Electronics Forum | Mon Apr 11 08:27:10 EDT 2011 | leemeyer
I have had similar problems before where the machine will intermittently stop with a limit error. Reset the machine and away it goes. Replacing the ribbon cable that runs from the head (37 pin D-sub)has solved this problem. This cable gets flexed a l
Electronics Forum | Fri Apr 08 21:39:17 EDT 2011 | jimlas53
Hi, We have a Quad IVc set up with all picks, placements, and sequence working. I have managed to get through several passes with some pain, mainly from SOT-23 parts, but it is getting better. On occasion, when picking from one of three feeders loc
Electronics Forum | Tue Apr 19 14:58:05 EDT 2011 | rdoss
The ribbon cable would be my guess. I ran a IVc for about 3 years and we use to have to change out our cable at least once per year. I also wanted to add that you can contact Precision Placement Machines (PPM) for parts and service. We use to use
Electronics Forum | Mon Sep 30 16:36:00 EDT 2013 | richardconnell
I have a Universal Instruments Corporation TAB Bonder. Oldish machine. Initial fault on machine : - "Axis Head 1 Z DAC Limit error during move absolute command" Other fault seen after we reset power, Zeroed axis etc. - Axis Head 1 - Z error not re
Electronics Forum | Tue Oct 01 18:44:24 EDT 2013 | richardconnell
Hi, I have limited capability on the Z axis. The axis will home to the mechanical switch limit and then drop to a point which I asssume to be the fiorst zero point below the mechanical switch limit. Then it gives the error. There is power to the mo
Electronics Forum | Tue Oct 01 17:56:10 EDT 2013 | swag
I'd take a look at the power supply for the failed axis and see if it's still working. I've also seen encoders fail on motors but it's rare in my experience. Usually it's a power issue.
Electronics Forum | Thu Sep 08 13:07:18 EDT 2016 | claudea2
Hello Bob, we changed the nozzle z parameter until we got limit errors and backed up 1 mil. There was a slight reduction in the limit errors on the pickup of the component but it is still a problem. With the mod code we adjust the soft z height to ab
Electronics Forum | Thu Sep 08 15:22:32 EDT 2016 | bobpan
If its a tall part and you are trying to scan it lower than 200 or so...you can have this problem (limit error). Thinking of things to look at.....Is your z-rod spring sticking? Push up on it and it should spring back with NO hesitation...if it does.
Electronics Forum | Thu Aug 25 07:43:24 EDT 2016 | claudea2
We have been having a recurring error on one of our Quad 4Cs. When it picks up the first of 8 47uF SMT capacitor it stops with a limit error. If we do 2 consecutive function 30s, the problem goes away until the next board. The first function 30 re
Electronics Forum | Thu Sep 08 15:45:21 EDT 2016 | claudea2
Thanks Bob, I will change the z-rod just to make sure. It is a tall part read at 180. The nozzle height bugs me because we have 3 machines and the first one has a nozzle height of 238 while the 2 others around 200. I am thinking this parameter may ad
