Viper,
Thanks for the help.
I went threw the tuning of the servo motor. I can tell the servo drive to show me the rotor position with a parameter. When I do this, the number stays very stable. + or - 1 encoder count. (it looks stable to me)
oscillating ? I don't feel anything when I put my hand on the motor and as I said, the encoder shows the rotor position is stable.
When I remove the servo drive enable circuit, the position indicator on the camsoft interface still counts up !!!!
My setup shows the position indicator in inches and with the servo enable circuit removed, the camsoft position indicator (CPI) ? shows it traveling about 15 ft/ minute. (not exactly sure but obvious it is traveling a few INCHES every second or 2). If I leave it alone for a bit, it will count up to the thousands of inches.
When I remove power from the servo drive, it stops.
The motor encoder is connected to the servo drive and the servo drive has an "encoder simulation" connector on it. (it looks like a 9 pin serial port on your computer).
I hooked up a CAT5 cable to this and ran the cat5 to the ICM2900 breakout box that connects to my computers Galil 1832 card (all of 7 or 8 feet). (the connection between the motor encoder and the drive is made with real cable as 4 twisted shielded pair with overall shield.)
I don't want to hear about it.. I know a CAT5 is NOT what should be used but the shielded cable was on order. Anyhow, it was a temporary solution and it was working fine for hours and hours of testing. The cable will be replaced soon but I really dont think its causing a problem unless theres something Im not thinking about.
The cat 5 has only 24 volt DC lines next to it. Even at the closest, (next to the drive) it is still 8 inches from any power line.
ANy suggestions??
Thanks,  |