Electronics Forum | Mon Apr 17 00:21:31 EDT 2006 | smtuser1234
Get rid of the machine would be the best fix.
Electronics Forum | Thu Apr 13 15:31:52 EDT 2006 | daxman
Yes, you are correct, no fiducial correction. If I force a fiducial correction, then the placement is alright. I should also mention that the placement gets worse as the production continues. I checked the lead screws and bearing holder...looks o
Electronics Forum | Thu Apr 13 16:21:29 EDT 2006 | jdengler
Make sure the pulleys on the motor and lead screw have not come loose. Look for damaged encoder wires in the cable way. If all of this mechanical stuff checks out then you probably have a bad encoder. Jerry
Electronics Forum | Fri Apr 14 10:07:18 EDT 2006 | vikkaraja
Have you checked the table itself. It seen it where either a PCB lifter or adjustble rail brake is operating properly.
Electronics Forum | Tue Apr 25 12:01:17 EDT 2006 | daxman
Just thought I'd post and let you all know, SMT Research helped me identify the issue here. Turns out it's the outer moveable rail on the XY table. The clamp bracket brakes were in bad shape, and the outer rail was slipping.
Electronics Forum | Thu Apr 13 11:07:15 EDT 2006 | jdengler
If I follow your description correctly (no fiducial correction occuring between load position and 19000 pulses) I agree that the encoder area is the problem. The encoder may be OK but the mechanical connection from the motor to lead screw may have c
Electronics Forum | Fri Apr 14 13:36:44 EDT 2006 | cyber_wolf
Dax, More than likely your moveable rail is slipping on the X-Y table. Make sure there is no oil where the breaks grab the table. Sometime the breaks wear out and need replaced. The contact surface on the break lever is only a couple of thou.. We hav
Electronics Forum | Sat Apr 15 11:18:58 EDT 2006 | oldtech
I once had a problem with the fid camera that caused this problem Try turning on the fid camera and align the cross hairs over the tooling pin or any stationary object. lightly tap the edge of the light housing with a alan wrench if you see the cro
Electronics Forum | Sat Apr 15 19:11:53 EDT 2006 | daxman
If I've been clear, the parts become offset as the XY table moves around, without fiducial correction. It's when it does a fiducial correction that the placement is alright. If the placement is excellent, and I just zip the table around...load posit
Electronics Forum | Thu Apr 13 10:05:47 EDT 2006 | daxman
Okay fellas...I posted awhile back regarding CP4 and CP6 placement issues. I think we may have figured it out. XO/YO and mark read positions were not correct. However, we have a new problem with the CP4-2. I was running the Fuji board, placing a s
