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hello and welcome to the Rockford Systems machine safety compliance 101 webinar we are ready to begin my name is Keri Haley and I am the moderator for today's session your presenter is mr. Roger Harrison director of training with over 25,000 hours of machine safeguarding standards and regulations training under his belt and is a frequent speaker at the precision metal forming Association fabtech various safety councils and other venues through his teaching methods you will learn to interpret the OSHA and ANSI standards as they relate to specific machine applications and production requirements you have arrived in mute mode so that the presenter can speak clearly without background noise if you have any questions please type your questions in the chat box at any time during the webinar and we will address your questions to the best of our ability at the end of the webinar before Roger gets started I wanted to take just a brief moment to introduce rockford systems to you we are located in Rockford Illinois just outside of Chicago offering quality machine safety solutions since 1971 as a trusted advisor to industry Rockford educates organizations on how to interpret and apply the complex OSHA regulations and ansi standards for machine guarding in addition Rockford offers a full suite of machine safety solutions ranging from on-site risk assessments and machine surveys through product installation training and supports and culminating with ongoing compliance validation please visit our website Rockford systems comm to learn more about our full range of machine safety lifecycle management solutions join our mailing list and follow us on social media our webinar topic machine safety compliance 101 was chosen as a response to the fact that annual injuries resulting from a lack of proper machine guarding are not declining at a significant rate as reported recently in safety and health a lack of machine guarding is consistently on OSHA's top 10 most cited violations report moving in fact from number 9 in 2015 to number 8 in 2016 resulting in over seven million dollars in osha fines each year the actual price tag for an injury is actually much higher than simply the OSHA citation because indirect costs must be taken into account such as damaged facilities or equipment medical expenses lawsuits lost productivity and replacement personnel worst of all these accidents can cause extremely severe potentially life-changing injuries to employees or even death it is estimated that workers who operate machine and maintain machinery suffer approximately 18,000 amputations lacerations crushing injuries abrasions and most profoundly more than 800 deaths per year in 2016 alone eighty eight percent of the total number of osha machine guarding violations were classified as serious meaning one in which there is a substantial probability that death or serious physical harm could result and the employer knew or should have known of the hazard after a decade of dismal improvement we need to make machine safety a top priority Rockford estimates that alarming 50% or more of metal fabricating machinery in the US do not comply with the critical safety requirements for guarding outlined by OSHA and anzi this non-compliance statistic applies to both old and new machines and contrary to public perception old machines are not grandfathered in as part of ongoing market research Rockford recently purchased a new mill drill and a new drill press from leading machine manufacturers after undergoing machine surveys both machines were found to be in dire non-compliance brand new out of the box any one of these violations would render the machine unsafe to operate new out of the box and subject to OSHA citations and mods this topic will be explored fully in our February 7th webinar so in summary Rockford systems is committed to helping your organization improve machine safety by offering a full suite of safeguarding solutions that not only reduce operator risk but also improve productivity cost savings and overall productivity here's just a quick view of the topics that Roger will be covering and for now I will hand it over to Roger thank you good morning everyone my name is Roger Harris and I'm the director of training here at Rockford systems and conduct to 11 seminars a year two and a half day classes here at our training center as well as custom classes on the road so happy to be doing this webinar with you today as you can see we're going to be covering OSHA regulations keeping in mind about half the states have a state approved plan the rest use federal for ocean gonna be covering an CE Marking National Standards Institute B 11 series on metalworking machines which have been out there since the 1920s in some cases National Fire Protection Association and FBA 79 the electrical standard for industrial machinery along with an FBA 70 II for arc flash issues we've got a few references at the end for robot animation or automation to CSA or Canadian standards Association which are very similar to European standards and regulations because that's where Canada got those so in OSHA regulations the most general thing is nineteen ten to twelve a one general requirements that require the employer to protect the operator and other employees of Machinarium from exposure to recognized hazards point of operation hazards in going nip points rotating parts flying ships and sparks are all in there but the one that gets the most attention is the first one point of operation every machine has at least one point of operation some more than that that's where a lot of serious injuries occur and that's why so much emphasis on that one safeguarding methods well the three that OSHA includes here at the bottom are just a few of those that we're going to talk about actually you're better off to go to the ANSI B 1119 safeguarding standard which has five basic methods of protection those being guards devices distance also known as safe holding location also known as a position of operator control and safe opening well we're going to concentrate on is guards and devices in this class so in the next slide here let's talk about risk assessment this is something spent around since 2000 I think the first standard I ever saw in was industrial robots so you've got severity of injury probability and frequency you've got to deal with go through the risk assessment process which we're not going to take time to do here but we will have a webinar on in April to figure out a hazard risk number for that machine so you look at each of the three color groups make a number to represent the exposure stack it up against the scale to see what level of exposure you have which will then tell you what's appropriate for safeguarding the level of exposure to saw they've got severity probability frequency and actually the fourth one is avoidance that's going to come up later under break safeguarding avoiding the hazard would be easier on a slower machine than a faster machine the press break safeguarding standard addresses slow speed safeguarding something brand-new and the ansi standards although it's been around in the european regulations for a long time so an CB 11/0 2015 the safety of machinery and risk assessment is this standard you want to get a hold of to understand risk assessment on machinery just like be 1119 ansi standard to understand safeguarding itself on lower level hazard exposures consider awareness barriers for safeguarding talk about railings chains and cables now these are not the same level of protection as a guard no yes you could crawl underneath them or step over the top of them yes but they're a lot better than just a yellow line on the floor because of the yellow line you can inadvertently or on purpose step over the line so this sets up an obstacle between you and the has you have to make a conscious effort to get beyond it along with a contact with it to get beyond it so railings chains cables they really should be accompanied by danger or warning signs now general signs like the one you see at the top right corner well that's better than nothing but ideally our best practice you'd have a specific danger warning sign that lists the hazards in going beyond the chain like sharp steel edges moving coil stock in going pinch points things like that so for lower level exposures consider awareness barriers let's talk about point of operation guards something that actually keeps you out of a hazard area that's what you're looking at here if you have a guard according to OSHA you cannot reach over it under it through it or around it even if you really try it so if you look at the left side of this guard you see a reach through hazard there an opening big enough to get a small hand far enough there to get hurt that's an issue that's a problem you need to deal with also down at the bottom of this slide you notice the Enix II considerations for transparent guards that came out in 2010 that's something that recognizes that polycarbonate guards lose their impact protection over time especially if their can they come in contact with cutting fluids or other industrial chemicals or even with sunlight they lose their impact protection so a point of operation guard requirements if you look at OSHA regulations and if you look at ANSI standards there's five things unique to consider first of all over under threw it around and mention that which actually comes out as an acronym out of this card should keep you out of here secondly you have a measurement scale for guard openings and guard distances to make sure somebody with a small hand can't reach far enough through the guard opening to become injured thirdly you don't want pinch points between the guard and the moving machine parts good visibility into the point of operation is usually polycarbonate but it doesn't have to be fasteners not readily removable means they want a tool to get into the guard that's OSHA saying at a tool now if you have an interlock switch to back you up on that garden you could get in there without the use of a tool and still be okay so the first five items show up in OSHA May as mandatory for guards the last two on the bottom talks about material strong enough to protect people from recognized exposures like a punch breaking and coming out towards the operator and free from sharp edges that could injure people those who show up only in the ANSI standard not in the OSHA regulation but they're common fest if you think about it the guard opening scales that are available out here and we offer them as you can see down here at the bottom include the OSHA scale and the ANSI scale OSHA scale have been there ever since OSHA came out in 1971 that scale is based on a woman's six glove with average finger length ii ansi scales based on a woman's size four glove with average finger length both of these initiated from the Liberty Mutual Insurance Company in the ANSI standard writing committee so if you took the OSHA scale and the ANSI scale and put them side-by-side as we've done here through exactly the same size guard opening you see that the OSHA scale and the top right photograph doesn't quite reach the dice when you lock it in place that's good you just passed a test on the OSHA scale on the ANSI scale below it the tip of the scale goes into the die and that's a problem could you fix it yeah you could move the guard further back and/or make the opening smaller one of those two methods who's likely to use the ansi guard opening scale that would be insurance company lost consol could lost control inspectors especially if they get into a plant where there's a lot of people with very small hands occasionally that's what you see interlock switches perhaps some of you have guard interlocks and adjust the push button or a lever arm interlock switch which if it's working and you can prove it's working may pass an OSHA inspection however the best practices are to use an interlock switch that's designed to be difficult to defeat like the one in the lower left corner notice you have a unique shape or geometry on the key so you can't fool that interlock switch by using a screwdriver a piece of metal you've got to have that size and shape actuator so that's a safety feature on the newer best practice switches you don't have on the old lever arm or push button in the top right you've got a latching feature the black tab is circled because then the operator closes this door slides the latch over the black tab goes into the body of the interlock switch and is locked in place by a solenoid solenoid locks it in place so you can't open the door again until the as it is motion going on behind the guard has come to a stop function testing guard interlock switches is required by ANSI is a best safety practice before you start each new operating shift one to make sure the interlock is working and two to make sure it hasn't been cheated which may be one of the same thing so function testing guard interlock switches see an example of a function test checklist which is something that we offer perhaps others as well look at the bottom here other function test checklists would include like curtains to ink controls perimeter guards and so on because it's a universal requirement to check out your safeguarding whatever that is before you start every operating shift to ink control is always better than a foot switch to initiate the cycle of the machine because at least you know are the operators hands are occupied on the palm butts whereas with a foot switch you don't know what that is but if you want to use the two in control as a safeguarding device as this might be the case on ax or a power press where you manually feeding one part at a time in this single cycle mode of operation there are rules that you have to follow in order to do that and have it qualified as a safeguarding means those rules are found both in the OSHA regulations as well as the ANSI standards infrared light curtains have been out there since 1954 dr. Erwin sick and been ADIZ and they were used in Western Europe through the 50s the 60s and then when the 70s came around where OSHA was promulgated there was another of other manufacturers had started making like hurt today I think there's 20-some different manufacturers worldwide there's a lot of applications for these you look on the left side they can only be used on machines that can stop consistently and immediately anywhere in their stroke or cycle without damaging the Machine the tooling the work or creating another hazard now there's two different categories here point of operation light curtains and perimeter like Hertz one of operation light curtains have closed channel spacing so even if you were to reach through that vertical sensing field flat handed you would send a stop signal in time to keep from getting hurt if your hand kept going so a point of operation operation light curtains have a closed minimum object sensitivity which is to sell or channel spacing perimeter light curtains are designed for whole body protection torso protection walking through the sensing field so the cells or channels can be much further apart and that's okay what you're looking at here is a mechanical power press with three different types of safeguarding you've got light curtains that's the yellow light bars there you've got two hand controls near the bottom and you've got hard guards or on the sides the top the bottom and the back what are the side guards for to protect other people from getting in there whereas the like currents to hang controls are for operator protection actually that combination of three different types of safeguarding is very common on a lot of different types of machines not just power press it's probably the most common combination of safeguarding that there is about a two sided perimeter light for whole body protection with three single beams that go around the corner with a mirror yeah you can do that make sure you in your bid spec when you buy new light curtains that should tell the manufacturer how long of an optical shot you have and how many mirrors you're going through if any because that does decrease the signal strength or gain of the light curtain by the way the beam should be no more than 24 inches apart and there should be no more than six inches bet
een the lowest beam and the floor two things you can do with light curtains muting and blanking muting means you automatically shut off the light curtain during the non hazardous portion of the cycle assuming there is a non hazardous portion of the cycle so it's got to be active for the hazardous motion portion you can shut it off or mute it during the non hazardous portion it's usually to speed things up for productivity is a reason people mute a licker banking is different and blanking is oftentimes abused because people overdo it now the one at the top the top left photograph there as blanker covers on the other end of the line curtain you can see them circle there and I think what they blanked here is adequate like her is far enough away and the blanking is low enough in the sensing field that I don't think anybody could reach in next to one of those crap trays and get hurt so the top one looks okay the bottom one has a problem there's ten blinkers stacked up in a row so somebody could stand outside that light curtain reach their entire arm through the sensing field into the moving dies and never be detected by what's left of the affective cells or channels you know the channels that are still active so the top one okay the bottom one not okay you see where it says no protection below this line that's a dead zone lying which ideally would be marked on your Likert and if it's not I might suggest you find that line and do that market because there's no protection there so if somebody were say seated in front of that machine and putting their hands in the point of operation to feed and remove the parts they're using a foot switch they think they're protected but they're really not they're below the active area of the liker so easy solution would be to move the light curtain down a few inches to deal with that indicator lights unlike Hertz you got red you got amber and you got green to tell you what the status is now those indicator lights are needed to do a function test procedure of the Likert and something you should do before every shift and here's an example of a function test checklist for Likert although as you can see in the first line this is generic is that what you should be using an electric or function desing well ideally know if your light curtain manufacturers still around you go online and get the make model specific function test procedure that they suggest for that like her so don't settle for generic in the place she uses a generic is where you have a Likert menu that's no longer around so you have to start with something to develop your own procedures notice the photograph with the two black sticks beating held by those two hands there those are test rods or like hers most like Kurds require to test routes of fat one and a skinny one and their diameter is very specific it's not like one size fits all know that have the right size test rods with that light curtain to wand the sensing field as part of the function test procedures safety distance is required for two lane control and for light curtains so the operator can't beat the machine and get into a hazardous area and become injured so to do this on a machine like a power press you have to measure the Machine stopping time by interrupting mid cycle x 63 inches per second which is the average reaching speed come up with a minimum OSHA safety distance which is what you see in yellow down there 12 and a half inches is that really practical for a safety distance on a small press yes because they stop pretty bad in general what's in white at the bottom is the ANSI standard safety distance which is significantly further away than OSHA like 4050 percent further that comes the Likert maybe only 15 or 20 percent when it comes to to hand control so you're supposed to be consistent within your plant that has similar machines and within other locations that you have wherever they might be you're supposed to be consistent in type of safeguarding and the rules that you elect to follow this is a portable stop time measurement safety device designed for calculating the stopping time which one plugged into a formula will give you the safety distance for light curtains or two lane controls if you have a newer control system manufacturer the last 15 or 20 years you probably have a built-in stop time measurement device you have older controls like relay logic controls that are older yeah you probably need a pourable device like this one so you could purchase a device like this or you could contract the service done I know we have a service that does that here at our company to do stop time measurement tests those of you that happen to have mechanical power presses see that reference down here at the bottom are required to use an interlocked safety block when you are adjusting or repairing dyes while they're in the press that's an OSHA mandatory thing you see the chain with the yellow plug on it when you pull that chain it drops off the main motor power you wait for the flywheel in the motor to come to a stop then you can place the safety Block in the dye and what you're doing is propping up the dead weight of the slide in the upper die if the breaker counterbalance on the press should fail that's a mandatory thing on a mechanical power press on a straight side press like this one is you may well require two safety blocks because it's tough to get a safety block large enough to hold back that much dead weight so one on the front one on the back and they would both need an electrical interlock plug talk about press brakes for bending materials this is last updated in 2012 and as you can see this operator is using a licker the black light bars on either end so that he can initiate the cycle with a foot switch which brings the dies down to within a very small opening like a quarter inch or less slide the park through the dyes against the backstop make another press on the foot switch to initiate the bend now once he comes down to the quarter inch the light curtain is muted or turned off so he can reach in and hand support the part as it bends that's referred to as foot down foot through sequence and yeah that's legit to do it that way otherwise you sometimes see palm buttons like two hand controls that she used to bring the Machine down to within the quarter inch place the part through the dyes against back stop use a foot switch to finish the bend that's referred to as two hand down foot through sequence and that's also a legitimate method of safeguarding now both foot down foot through sequence and and on foot through sequence use the quarter inch safe opening that we discussed earlier hydraulic press brakes and also use a laser device of which there's four five different manufacturers this is correctly categorized on the right hand side there is a close proximity point of operation laser active opto electronic protection device in the ANSI b11 3 standard it's sometimes used well it's always used on a hydraulic press brake you've never seen these on mechanical press brakes because mechanical are not stopping fast enough to justify the use of the device it's mounted with a zero safety distance remember that previous slide where we had a light curtain well those are mounted about eight inches from the dies that's the safety distance required these require zero safety distance which has two primary advantages one is that you can handhold small parts up close like this guy at the top and hold small parts up close down at the bottom you got a part with a tall side leg a tall side leg that creates the same problem and it's that is if you're using a light curtain you could blank out so many cells or channels if the light curtains not doing any good so that's a real advantage on a hydraulic press spring is a laser safeguarding device danger signs keep in mind need both verbage as well as graphic symbols pictograms they call them so here's three specific situations where you could become injured on a press break bending die grinders oh yes we all know about the 8 inch maximum opening doing the work rests on a wheel on a bench or pedestal grinder that's an OSHA mandatory things matter of fact that's the most common machine guarding violation in the US and has been for 45 years ever since oh she came around in 1970 1/4 inch maximum opening for the tongue guard up above is also a common OSHA violation and you want to make sure people are following the rules in mounting the grinding wheels so that you right spacers blotters they don't torque it down too tight and to make sure that they ring test the wheel before they mount it that is to suspend the grinding wheel from its center hole and then tap it around its outside diameter with a nonmetallic object like a piece of hardwood make sure you can ring the wheel like a bell a bell tone as opposed to the thud or crack plate sound that you might get if you have a cracked wheel you never want to mount a crack wheel now when you start up a bench or pedestal grinder they suggest that you stand off to the side for at least a minute because if that grinding wheel is going to shatter it usually happens within the first minute so keep that in mind also the bolts or the fasteners for the wheel cover here there's some fasteners missing which could be in a possible OSHA violation as well here's a gauge to check the eighth inch for the word grasp quarter inch for the tongue guard on that grinding wheel which is also something that we handle on our website as far as metal sods there's an ANSI P 11:10 standard for this of course ours osius concerned it's a 2:12 machine general requirements what's the main OSHA problem with these they either don't have a blade guard or it's a miss adjusted blade guard so the one at the top looks to be relatively well adjusted the one at the bottom though has an exposure where the blade is supposed to be covered and it's not so that's the most common thing they look for on saws whether they're circular saws or band saws pressure-sensitive mats are being used and a horizontal tube bender it's an l-shaped thing notice the yellow ramp around the edge of it which has provisions underneath the ramp to anchor it to the concrete floor because people will shove these things out of the way if you give them the chance to do it especially smaller lighter mats there's three different mats here they're buttered up next to each other there's no space to sneak in between and that's good they're also large enough they have to take at least one if not more steps on the mat before he can get to the hazard to assure that the hazardous motion has been stopped by the time you get there so the mats have to be large enough so three things anchor to the floor buttered up next to each other and large enough radiofrequency is an antenna system that gives off an invisible capacity to field so the operator in this case standing down down there at the bottom long as she's got both feet touching the floor she is a properly grounded object so if he reaches if she reaches towards that antenna it's within about 16 18 inches of it it sends a stop signal to the guarded machine that's assuming the sensitivity is set properly because the sensitivity on these devices is adjustable inside of the control box so if somebody gets a hold of a key to open the control box and turns down the sensitivity you might have to come up almost grab the antenna because if the stop drop probe devices ring drop devices halo devices is something that mechanically verifies that your hands not the wrong place as you cycle the Machine most commonly it's used on riveters where you're hand holding the part and using the foot switch now you have a protection device in the form of what you see that are on the left our in our company's case it's referred to as a detective finger drop probe device on a Riveter do you see the probe that drops out of the control box place the piece part on the lower part of the machine step on the foot switch first thing that happens is the probe drops down to just above the part then the Machine cycles as long as it drops its full drop depth however if your fingers in there along with the piece part which means the probe can't drop all the way down it won't go it's a present sensing device that prevents the cycle only so 95% success rate on riveters only about a 65 percent success rate on spot spot welders like the one you see on the right because you can't spot weld into a core but they are applicable to both machines and some others by the way can use this device here we have an old engine lay the number one OSHA violation number one accident that insurance company inspectors look for is that somebody left the Chuck wrench in the chuck forgot it was there started the Machine up and sent it flying that has actually caused fatalities which is why over on the right side you see an example of a spring-loaded self ejecting Chuck wrench which self ejects you have to hold it in there as you're using it in other words one more thing the top left corner of this lathe is a manual motor starter with stiff mechanical clicks to turn the machine on and off problem with a manual motor starter is it doesn't give you a dropout protection drop on protection in other words if the machine is running and you suddenly lose power to it powers off for 15 minutes power comes back on yes with this machine it'll restart unexpectedly if the start button is engaged with a magnetic motor starter no you'll have to come back to the motor start button so I'll show you some magnetic motor starters later but this one is mechanical and should be replaced what you're looking at here is four different examples of Chuck shields I'm not talking about guards now these are shields which are hinged and as you can see each one of these is in the open or up position so before you use them you bring them down to the closed position this is not a garden this is not giving the same level of protection as the over/under through and around we talked about before nor does this have to be electrically interlocked at least not here in the United States but it is required because they keep you from inadvertently coming in contact with the rotating work holder that Chuck Shield can you get electrically interlocked shields yes the one on the left is electrically interlocked Chuck shield to European design on the right is a typical and shield with a built-in electrical interlock switch so yes that would be best practice it's what's required in Western Europe and Canada telescopic stainless steel sleeves to cover the horizontal rotating components like leads group feed rod Traverse rod camshaft stuff like that this is not clearly defined in OSHA but it's certainly a best practice and it came to light about five years ago or was a young woman at Yale University too lost her life because she came into the shop in the middle of the night she had a key to get in there because she was a supervisor of the shop and couldn't get enough machine time during the day so she came in to finish her senior project middle of the night unfortunately she did not adequately restrain her hair was grabbed by one of these rotating components and she died by asphyxiation strangled by her own hair so it's I guess that's good evidence that a lot of these safety standards are written in blood has to be some fatalities for people to pay attention to them to knock down chips and coolant you've got simple Universal ball-and-socket shields like these well and but I'm wearing safety glasses well the question is are the safety glasses adequately controlling the chest or do you still have chips hitting you in the upper body which is unacceptable or collecting on the floor which might create a slip trip hazard which is unacceptable so shields pick up where your PPE leaves off you want to think of it that way this is another example of a telescopic chuck shield actually it's a European design with three segments of telescope into one another notice the visibility windows on the two bottom segments you can also lock one segment up like in that second one from the left there and depending on the length of the drill bit that you're using so this is like a two for one yes it knocks down the chips are coolant and drops them out the back that's good but it also restricts your acc
ss to rotating parts like the drill bit the chuck the shaft it's a sort of a 2:19 Kanaka power transmission cover at the same time it's a chip cooling shoe area laser scanners have been around about 20-some years now four or five different manufacturers out there so most of the ones I see are on the left side for area guarding matter of fact you look at the lower left what you got is that yellow thing looks like an eighth cup mr. coffee doesn't it sitting down there around ankle height which sweeps a laser beam back and forth to give you a field of protection now there's two different zones the light shading is a warning zone the dark shading is a fault zone if you step inside the warning zone you slow the robot down to creat speed flash a light beam a horn if the operator keeps walking into the fault zone it sends a stop signal to the guarded machine now those zones the warning zone the fault zone are both programmable as far as their size and shape you can program that right out on the shop floor with a laptop computer and more importantly you can change the configuration if your parameters change you can reprogram this thing unlike the use of pressure-sensitive mats which they oftentimes replace by the way so this gives you a lot more flexibility safeguarding an automation cell like this is usually a combination of safeguarding combination of light curtains various types of guard interlock switches pressure-sensitive mats things like that remember that there is a 2012 version of the u.s. robot safeguarding standard that's current 2012 but the 2012 version does not address the fence height issue which has become a problem with some fatalities where people sneaked underneath the fence so down at the bottom you see 12 inch sweep and 60 inch height that was a 1999 US regulation in other words you could have 12 inches open at the bottom at least a 60-inch total height from Florida top rail that is really not adequate which is why the Canadians now use their 2003 standard which I believe has been updated once since then to say no more than 6 inches open at the bottom and 72 inches for total height now I think that's what you're looking at in the right hand vote of 6 inches at the bottom 72 inches height with a light curtain entry area on the front which is fine the one on the left yes I think that also has 6 inches at the bottom with an 84 inch height that's even better because they're afraid of the end effector suddenly releasing a part of its emergency stop and throwing the piece part over the top of the fence that's why they increase the fence height down at the bottom they brought it lower so people wouldn't crawl underneath it because that's where fatalities have occurred but they started the automation sequence and then forgot something inside the cell so they try and sneak underneath the fence those of you with conveyors if you go to the website at the bottom semenette dot org you find five or six of these color cards that you can plastic laminate and hang on the conveyor to teach people what the hazards are so this is only two of them there's four five more of these by the way there's another manufacturer that you may want to jot down that has safety placards like this for conveyors only they have them in both English and Spanish that would be hi troll comm that's hy trol comm hi troll is a conveyor manufacturer but they also have safety signs that they offer with conveyors the often times you can use a grab wire East stop cable also known as a rope pull he stopped in lieu of putting a series of red emergency stops along the line of the conveyor because it could be a lot of stop buttons so the grab wire cables can go a long distance and they can be strung around the corner as you see in the top left there now on the right hand side you can see where there's a manual reset for the confor the grab wire says to and there's a yellow cover over rotating components because remember anything that rotates that can tangle up your hair clothing is required to have a guard or cover up to a 7 foot level now there's two basic principles at the bottom of this slide that conveyors is start up automatically you need an audible oh there's visual warning device that you can see or hear at all points of people may be present and on the right you've got a manual reset or start at the location where the emergency stop was initiated to resume operation actually I read something that said that 90 some percent of conveyors are protected by operator location as is defined in the B 20.1 standard NFPA 79 is the electrical standard for industrial machinery that includes things like emergency stop buttons with four basic principles you got a red mushroom shaped button a manual latch which you see is engaged on the left side but released on the right side so you have to release it pop the button back up go back to your regular controls and start up the Machine it's got an immediate background that's yellow and you have it readily accessible to the operator four basic principles for emergency stops that again come from the electrical standard for industrial machinery NFPA 79 which is not to be confused with NFPA 70e that contains the arc-flash issues for people that have to work on energized panels and have a certain amount of protective equipment in order to do that so actually your electrical and maintenance people should have both the NFPA 70e and NFPA 79 so 79 contains things like the rules for main power disconnects motor starters voltage reduction using step-down transformers properly grounded circuits emergency stops and three different categories of motor stop controls so on the left you need a disconnect switch you can padlock in the opposition it's a flange type disconnect where the handle goes up and down and yes it's lockable only off on the right you've got a roll type disconnect it's also lockable only in the off position notice the start button underneath that that's a symbol of a magnetic motor starter because the push-button is spring-loaded a spring-loaded push button as opposed to that old mechanical switch that we saw on the engine lathe there's also a red emergency stop button as you can see so this stuff comes out of NFPA 79 a couple of questions that have come up for a mechanical power press that you run in single cycle you need both guards and like Hertz well actually know you're in the u.s. yes in Western Europe do you need both guards and likers also question comes up it's not listed there but do you have to have two hand controls and light curtains well again on the US but yes in Western Europe number two what's the most common personal protective equipment used on grinders well that's by far a full face shield a full facial not just safety glasses but for the last 20 years or so most all plans I get into have a full face shield 3 it's a line marking the dead zone or the bottom edge of a light curtain required by OSHA or ANSI well the answer is it's the ANSI standard suggestion is a best practice to mark the dead zone so that you can verify that people are not reaching underneath the licker number 4 do all industrial machines require dropout protection with a magnetic motor standard like the one described according to best safety practice in NFPA 79 yes they do so replace your manual motor starters with magnetic to give you that anti restart feature thank you ok thank you so much Roger for your excellent overview on machine safety we are running a little tight on time so we're going to have to skip the questions that have been submitted in the chat box we will get back to all of you individually if you'd like to send a direct email to Roger feel free to send your email to Roger Harrison at Rockford systems comm and we will get back to you so thank you so much for your participation on our webinar today if you found this webinar helpful and would like to learn more we invite you to register for future webinars or training seminars both of which can be found on our website under education our next webinar is February 7th debunking the top three machine safeguarding myths which we'll cover in more detail the topic that was introduced earlier on safeguarding new machines we are also offering the same machine safety compliance 101 webinar in Spanish on March 15th and April 4th the topic will be risk assessment versus machine survey which is right for your organization also we do invite you to attend our in-depth two-and-a-half day hands-on learning seminar at our headquarter location here in Rockford Illinois you can download all of this information on our website under education ok that wraps it up for us today again thank you so much and be safe thank you everyone
