Adjusting Infinity IRS servo controller

For some reason the picture did not post.  Anyone know how?

DC offset is adjusted for minimum DC on the output. The level trim adjustments are just that.  Apply a similar signal to each input and adjust so that the outputs are equal.

Thanks for that picture, jtucker. Is it possible there is an error?

Referencing the ECU schematic seen here, it seems to me that you show adjusting potentiometer R30 for the level. But that seems like the wrong one to me.

I think the correct one is R23, since it is controlling the amount of negative feedback of the amplifier comprised of ICa, ICb, and ICc. Potentiometer R30 sets the level of the output from the amplification of the accelerometer signal.

I’m going to see what some of my electrical engineering buddies think.

I suppose it is possible that I made a mistake, but I had to re-calibrate my servo on a regular basis.  Those were the pots that used.  If you have access to a scope, it would be easy to verify.  I'm pretty sure I gave the schematic to the new owner, so I have nothing else to compare.  Also, I ended up replacing all the electrolytic capacitors in it.  As I mentioned, all this was back around 2010, so I don't recall any more details.  If I come across anything else in the next few days, Ill let you know.