Servo Motor Running away.

[murphy625]

UPDATE...

The encoder simulation port on the old servo drive WAS bad....

I replaced the drive with an identical one I bought.. (Buy one get one free deal)..

The 2nd drive seems to work fine upon quick test. All encoder counts are smooth all the way back to the computer monitor. They count forward and backward very smoothly.

By the way Al, I disconnected the +5v line from the encoder simulation port to the ICM2900 and left the gnd on...
There is NO CHANGE in operation so I just left it off !

I wonder if that could have had an effect on the other drive.

Should we discuss that for another 35 threads????

THANKS TO EVERYONE AND SPECIAL THANKS TO AL the moderator.

Murphy

[Al_The_Man]

Originally Posted by murphy625 By the way Al, I disconnected the +5v line from the encoder simulation port to the ICM2900 and left the gnd on... There is NO CHANGE in operation so I just left it off ! I wonder if that could have had an effect on the other drive.

Glad you solved the problem, normally connecting both +5v supplies is not neccessary and does not normally cause damage ( but there's always a first time). The defective drive is not a complete loss as you would still be able to use it with a motor that has a descrete encoder.
Al

[murphy625]

I called Control Techniques.. They want $810 to fix it....

I dont see a use for the drive if the endcoder port doesnt work.....

Next time I will stick with normal encoders.

Thanks again.... Im going to start another thread on a 5volt supply.

Murphy