converting a tos/intos fngj 40

Do you have 5V and field power on the 7I77

(four yellow LEDs and one red LED illuminated on the 7I77)

Also posting your hal/ini files may help

looks like i haven't flashed the 7c81 correctly, now it seems to work.
PCW suggested to connect the analog out and ground to the differential input J2  1,2. I have now found some interesting info online about the drive. I am interpreting this like that: i will connect the analog out to one of the diffential inputs and the ground to the Pin J1 4 or 9. Is this correct or should I connect the ground to the other diff input too?

7I77 AOUT --> Pin1  (IN+)
7I77 AGND --> Pin2 (IN-)
7I77 AGND  --> Pin9 (common)

In the Ini File I have set the encoder scale, they seem to work correctly. But I can't figure out where i need to set the ratio to the motor (for example 5mm Ballscrew+ 1to2 belt). The manual specifies it for steppers, but not for servos

if that's a 2 to 1 encoder to ballscrew ratio. the encoder scale would be

encoder counts/turn * 2 / 5

where encoder counts are PPR*4

If these are torque mode drives (no tachometer feedback) the output scale can be left as-is

if these are velocity mode drives with tachometer feedback, it's helpful to set the OUTPUT_SCALE
to mm/s at 10V (full scale) so the PID values are normalized (and FF1 is 1.0)

They do have tacho feedback. But they don't seem to be velocity mode drives, is that correct?

 

If they have tachometer feedback, they are velocity mode drives.
 (a velocity mode drive is a torque mode drive with local velocity feedback)
 

Thank you very much PCW, you are helping me a lot with this project.

Ok, so if I understood this correctly, to calculate the output_scale, I need the rpm the motor makes at 10V input signal and from that calculate the linear velocity, but since i cant find anything like that in the specs, I guess i need to measure it?

Its not the RPM you need but rather the linear mm/s velocity at 10V
If you have your encoder scale set correctly (check first) you can
measure this at the encoder velocity pin (it should read in mm/s
if scaled properly)

Edit, I miss-understood, yes, measuring the RPM if you have a way
to do this without LinuxCNC should work as well
 

Pin8 of the servo driver is like written in pinout a inhibit pin. So this should be connected to the mesa enable+ pin and enable- pin to GND. The Manual i ve attached says Pin 8 can sink about 200mA but this has nothing to do with how much it draws. So the 50mA of the enable switch should be fine right?