Re: [CAD_CAM_EDM_DRO] Servo amplifier boards.

I'm inclined to believe it's the STG card based on the following
deductions....

1) When I first started hooking up wires, I had DAC0 connected to the Y axis
- because I was told that there may be a problem with the X axis. At that
point I got the Y axis working. I hooked up the X axis to DAC1, and saw
behavior in the X axis similar to what I'm now seeing from the Y axis.

2) While double checking my connections, I switched DAC0 and DAC1 to X and Y
respectively. I also switched the X and Y driver boards. Then I was able to
get the X axis to work.

3) Yesterday, I switched the X and Z boards. I was still not able to tune
the Y axis, but I did play around briefly with the Z axis and it seemed to
respond similarly to the X axis.

Hence, my deduction that it's the STG card's DAC output. At +.004, it's
actually the highest offset. There is a blurb in the ServoDynamics setup
literature about how to change out a resistor on the driver board to double
the adjustability of the balance pot. It seems like that should work, but I
would rather compensate for it in the software and keep the driver boards
consistent. Either that, or I would rather make an adjustment on the STG
card, if possible. Perhaps there is an exponential error (?) from the DAC -
it just doesn't make sense!

-John