OK Guys....got this thing on the ropes..... I swapped the Y card to the Z and it worked fine.... so I got a good card from Ebay...... installed the card.... no jog on Z or holding power....turn motor by hand with drive engaged.... Set card to factory pot setting per servo dynamics manual.... still nothing..... started increasing (CW) CL pot..... got motor to start a slow Z- jog ..... backed it off until jog stopped....
Then with a scope hooked to Z axis and Y axis it tried moving pots to make Z waveform look like Y ...... right now my Z is holding...cant move it much by hand with drive powered and it returns back to zero as soon as you let off with pressure..... I adjusted balance pot and have Z lag nice and steady...... Aux is all the way CCW ...... Signal is 10 turns CW ...... Tach is 5 turns CW ....... Comp is 10 turns CW ...... CL is about 8 turns CW..... and Balance is about 10 turns CW ......
Leaving CL and BAL alone.... if i turn SIG .....COMP.... or TACH ..... much in either direction (individually) I will either trip the drive with no motor movement OR turning TACH or SIGNAL too far CCW will bring back -Z jog with no signal input.....
SO..... motor is holding Z but not jogging when I call for it....but it will move all by itself if I turn "down" the tach or sig.... right now everything but the CL and BAL are at factory manual settings....
What do i do next....??? I REALLY dont want to try and turn the Y pots to try and duplicate those settings....I would rather just try and get this "new" Z card tuned in.... any thoughts on what to trim next ?? These pots are much more sensitive than I thought they would be....