Electronics Forum | Mon Oct 31 09:31:30 EST 2005 | meritajs
Thank all for help Good luck
Electronics Forum | Tue Oct 25 09:20:10 EDT 2005 | meritajs
Hi, We have problem with y-axis offset at YM84 After setting the ORIGIN machine operate exactly but after sometime y-axis recieves offset bis 5-10mm.After repeated setting ORIGIN Y-coordinat became exact. The same things take place if we operate in W
Electronics Forum | Wed Oct 26 03:43:11 EDT 2005 | meritajs
Hi Ken, Thank for your advice We suppose that with home position all is OK and ratio is in interval 40-60%.Y axis offset is not constant 5mm or 10mm but change ratio with working time and may be more than 10mm We think that problem is with Yservo mo
Electronics Forum | Thu Oct 27 03:15:14 EDT 2005 | Jeff Roberts
The Y-axis motor of the YM84 Series is well known for failures. The bearing between the encoder and the armature fails causing dirt to fall on the encoder wheel, hence the encoder mis-counts. If you re-Origin the machine the problem is resolved for a
Electronics Forum | Thu Oct 27 03:01:25 EDT 2005 | mike
Peter, have you rany your local agent and got the service guy to fix it ??
Electronics Forum | Tue Oct 25 22:50:16 EDT 2005 | KEN
What is the (initial position) ratio of pulse counts to home encoder pulse (relative to the home sensor). It should be 50% +/- 15% Run this test several times in between a warm up. I bet your numbers are all over the place. I bet you have a loos
Electronics Forum | Wed Oct 26 21:44:42 EDT 2005 | KEN
If your sure your drive lines are staying put then it must be the motor. ... odd no servo feedback alarms though. That's why I thought problem might be mechanical. Does the yv84 use servo's? IF yes, then no brushes to wrory about. Don't bother t
Electronics Forum | Tue Oct 25 22:54:55 EDT 2005 | KEN
sorry. re-read your post. The problem is the home sensor relative to the home pulse. You're catching the wrong home pulse. a 10mm offset sounds about right for a 360 degree error. You need 50% +/- 15 % to ensure you always zero to the same phys
Electronics Forum | Wed Oct 26 18:25:13 EDT 2005 | darby
The encoder on the Y axis motor is almost certainly kaput. Debris from the wear of the motor brushes or whatever else can find its way onto the encoder and give an ever increasing false pulse. The axis will start OK but progressively go out of whack
Electronics Forum | Thu Nov 10 18:58:38 EST 2005 | darby
What is the problem Peter? See a recent posting on a Y axis problem with the same style of machine. If the encoder is cactus, buy a new motor. Sorry, this is the only solution I know of.
