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screen printing => General Screen Printing => Topic started by: mhprinting on February 14, 2017, 12:29:39 PM
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Hey guys,
I'm having a problem with my Diamondback S 8/7. See the youtube video below. The press operator says this is happening more often and it wasn't occurring as much before. Basically, whenever the press operator needs to use the restroom or whatever, stops the machine, unplugs the yellow cord, and whenever he's ready to start the machine again, it only indexes half way and we have to restart it. Sometimes it takes one try, sometimes it takes up to 5-10 times. I've contacted M&R support and sent the tech the videos and still haven't gotten a response. Any ideas what is causing this and how can I fix it?
Thanks!
https://www.youtube.com/watch?v=Od-5j6UrelI&feature=youtu.be (https://www.youtube.com/watch?v=Od-5j6UrelI&feature=youtu.be)
https://www.youtube.com/watch?v=aPhJkZEUDwc&feature=youtu.be (https://www.youtube.com/watch?v=aPhJkZEUDwc&feature=youtu.be)
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Why do you unplug the yellow cord? I have an older diamond back and I have never this issue. Sorry I am no help.
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Doesn't the yellow cord act the same as pressing the e-stop button? I'd imagine you'd have to restart the machine any time you did that while the machine was in print mode.
Why is he using the cord to stop the machine to go to the bathroom instead of just stopping the print cycle?
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Stop using the cord as a cutoff. Just stop the cycle, and release the fork on it (which isn't even needed really). It's not going to just kick back on and start cycling by itself.
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Hey guys thanks for the input. I've spoke to the tech and it may be because my servo motor is failing. I'll be getting the part this week to replace it and I'll let you know if that helps.
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Hey guys thanks for the input. I've spoke to the tech and it may be because my servo motor is failing. I'll be getting the part this week to replace it and I'll let you know if that helps.
Curious if the tech addressed your pressman's "alternative" method of turning the press off via the safety cord.
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Nope lol. We're still fairly new to automatic printing so we're learning everyday!
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Could also be a bad connection with a yellow cord.
We had that issue and it would prevent it from printing after index or print 1/2 the print stroke and stop. Finding the bad connection in the yellow cords fixed it.
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We have an old '94 Gauntlet, and a tech disconnected all the yellow cords, a safety precaution we didn't really need, many years ago. But as others mentioned, you don't have to disconnect the cord to stop and walk away...
Steve
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Maybe I'm not reading what you guys are reading, but sounds like he said he stop the machine then unplugs the yellow cord, didn't sound like he was using the cord to stop the machine to me.
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You're right, but the cord thing was such an attractive target! ;D
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Maybe I'm not reading what you guys are reading, but sounds like he said he stop the machine then unplugs the yellow cord, didn't sound like he was using the cord to stop the machine to me.
Not so much when he did it, as to why he did it. It's been a while, but if I remember correctly, they were very easy to unplug, so if someone walked into it, it would disconnect and stop the machine before someone could get hurt...
Steve
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I was printing a diamondback a while back and it would kind of do the same thing index halfway and release the clevis fork and bang something bad. Very sporadic but happened mostly when we stopped and the restarted.
Not sure why but would seem its happened to others so it is a problem.
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I remember having cords on my old multiprinter, but I like how the press I have now has safety bars, you lean on one and it's off, don't know who came out with it first but I see a few other press's have the same setup.
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Maybe I'm not reading what you guys are reading, but sounds like he said he stop the machine then unplugs the yellow cord, didn't sound like he was using the cord to stop the machine to me.
Yes, exactly! He doesn't use the yellow cords to stop the press, he just uses it as a safety precaution just in case the machine happens to index on its own (highly unlikely). Another scenario would be if he's adding more ink onto the screen and accidentally unplugs the cords, it does the same thing.
I was printing a diamondback a while back and it would kind of do the same thing index halfway and release the clevis fork and bang something bad. Very sporadic but happened mostly when we stopped and the restarted.
Not sure why but would seem its happened to others so it is a problem.
Yes that's exactly what happens to us. It's happening more often now. I'm glad I'm not the only one.
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your contacts on the cords are more that likely wearing out. I would stop using them like that. Make sure the machine stops and disengage the clevis with the reset button and offset your platens.
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our old gauntlet acted strange when air flow was restricted. Do you have any air issues?
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our old gauntlet acted strange when air flow was restricted. Do you have any air issues?
Nope, not that I know of.
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If that's the ONLY scenario where the indexer stalls, why would they think it's a bad servo? Doesn't make sense to me. Looks like it indexes fine after the reset and if it NEVER does it unless a stop action, yellow cord, restart sequence is done then it seems like a software/programming issue. Yellow safety cord signal is either connected or not, a poor connection should result in a "no-index".
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If that's the ONLY scenario where the indexer stalls, why would they think it's a bad servo? Doesn't make sense to me. Looks like it indexes fine after the reset and if it NEVER does it unless a stop action, yellow cord, restart sequence is done then it seems like a software/programming issue. Yellow safety cord signal is either connected or not, a poor connection should result in a "no-index".
Yes, that's what I was thinking too. It seems to me it is a software problem. I'll keep you guys updated once I get the servo motor in and replace it with the new one.
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Hey guys we had some down time this morning and I was trying to find solutions to the problem.
This is what happened this morning:
1.) Started a print run
2.) Put it on standby
3.) Pressed the green reset button to move the pallet out the way, put the pallet back to the load station, hit reset again, waited 15 secs, tried to index it, but it only moved half way.
We did not remove the yellow cord this time and it still only indexed half way so I'm thinking that it may not be a cord problem. What it seems like is that the machine works fine once a job has started, but if my press op puts it on standby to reload ink, use the restroom, or whatever, it has trouble indexing once we try to start it again.
Could it still be the servo motor going bad? My press is only 2 years old with 90k imprints.
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Hey guys, want to give you guys an update with my diamondback. We received the new servo motor almost a month ago and it seemed to work for a couple days, but the problem has returned. My machine still indexes half way after we put it on standby.
We'll be doing a print run, we stop the machine to inspect a screen (add more ink, fix a pinhold, etc), no yellow chords were unplugged, and when we go to index the machine so we can resume the print run, it indexes halfway and sometimes it takes a couple times for it to go back to normal, but sometimes we have to turn off the press 4-5 times in order for it to go back to normal. So we have to wait for the machine to boot up and if it doesn't work, we keep restarting the press till it gets back to normal. Unnecessary down time...
We have been experiencing a lot of down time and we are getting extremely frustrated having to deal with this problem. I will be contacting M&R to see what their recommendations are.
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http://www.pressdoctor.com/ (http://www.pressdoctor.com/)
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I would hanker and idea of the battery on the cpu. Turn off, take it out take it down to batteries plus and have them make you one for under $50. Have them check it of course. now on some machines if you do that you lose the program, check the book to see how they tell you to do it.
Shane
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Not sure what all you have coverd with M&R but I would have a talk with them about your PLC maybe needing reprogrammed or replaced. At the very least it sounds like you maybe you need to change the battery on the PLC if you haven't already.
Murphy
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I would hanker and idea of the battery on the cpu. Turn off, take it out take it down to batteries plus and have them make you one for under $50. Have them check it of course. now on some machines if you do that you lose the program, check the book to see how they tell you to do it.
Shane
This is a bad idea with the PLC's I've used--unless the new ones are very different.
The battery is what keeps the program, if the battery is still good you still have a program, if the battery is bad, nothing would be running right now. IIRC, M&R says you have thirty seconds to put a new one in once you pull the old one.
It certainly sounds possible that a faulty PLC could do exactly what you say, but I don't believe the battery has anything to do with the actual processing, only backing up the program in 'volatile' memory when power is off.
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Inside the ends of the yellloow cord there is a screw. If the screw comes somewhat loose, the cords will not work properly.
The serceno is, that when, on most presses, the emer cord is dis connected, the computer need to be reset.
Is the operator bringing the press back to the right location before he is starting back up. I also agree that the press should have a pause setting.
Never totally disconnect you saftey cable. Bad stuff could happen and aweay goes your
company and hard work.
He could put it in foot pedal mode and cover up the foot medal.
In allmodes...SAFETY FIRST.
or, ask M&R foor someone to come and properly train your employee on the press...or buy a Workhorse...