I am currently working on a retrofit using the Mesa 7i92, 7i77, and AMC 30A8 drives in torque mode which should be very similar to your setup. I don't know if you have seen them, but AMC has multiple manuals on their site that provide details on how to setup the drives in torque mode, adjust offsets, and such. Go to their website and search for your model:
https://www.a-m-c.com/products/?page=product&id=25A20
This will give you the datasheet for your specific model. On the above page, if you click on the reserved and discontinued items link, there will be a link to the classic analog drives HW manual which has a bunch of good information on setting up the drives. A direct link is here:
https://www.a-m-c.com/wp-content/upl...alog_Panel.pdf
PCW_MESA is correct in that the inhibit line left open enables the drive by default (it has an internal pull-up to +5VDC). I wanted the drive to be disabled by default and and didn't want to modify the drive's circuit board so I am using a normally closed solid state relay to pull the inhibit line to ground at power up or any other time when either the E-Stop is triggered or the drive enable switch isn't turned on. I also use another NC SSR for the fault line feedback to the 7i77 since I'm using 24VDC for field IO and the AMC drive uses a 5VDC TTL output. I can provide a hand drawn schematic for my interface board if you are interested. It uses 6 x CPC1333G ICs (4 pin DIP NC SPST SSR) and 6 resistors for current limiting.
I am currently working on tuning this and can get it to a following error of < 0.0005 at specific cutting speeds but currently need a max following error of around 0.005 to handle high speed direction changes. I think my encoders may not be helping here (magnetic AMT113Q-V). I haven't actually tried making chips with it yet in CNC mode as I currently have the upper end of the head torn apart for maintenance and to add a spindle encoder (J head clone).
Sean