What is causing this and how do I fix it?

[mhprinting]

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=aPhJkZEUDwc&feature=youtu.be

[balloonguy]

Why do you unplug the yellow cord? I have an older diamond back and I have never this issue. Sorry I am no help.

[sqslabs]

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?

[LoneWolf2]

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.

[mhprinting]

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.

[Frog]

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.

[mhprinting]

Nope lol. We're still fairly new to automatic printing so we're learning everyday!

[Admiral]

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.

[Sbrem]

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

[3Deep]

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.

[Frog]

You're right, but the cord thing was such an attractive target! 

[Sbrem]

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

[jsheridan]

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.

[3Deep]

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.

[mhprinting]

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.