Setting up Servos in step/dir position mode

They are steppers from LinuxCNC point of view.

Understood, they will be treated as steppers as long as the command signal is step/dir and it comes determined by the type of controller card.

RoberCNC wrote: Understood, they will be treated as steppers as long as the command signal is step/dir and it comes determined by the type of controller card.

Its not really the command signal that's important, it s whether or not LinuxCNC gets
external position feedback from an encoder.

Ok, then to treat as pure servos you must connect encoders feedback, but then, as you said before, problems come unless you have scales to fully close the loop.

I will first get acquainted with them in step/dir mode which is how little I know so far and then I will touch on the subject of backlash (pending subject) before going to the next level.

I really appreciate the help and info mates.

Hello again, let's see if you can help me (sure), I'm doing tests and running the machine and it happens to me several times that suddenly one of the servos goes into an alarm state, with the consequent annoyance, I can't give with the reason and I can think of how to identify the problem.
The fault is in one of the Y's (it is dual) and the work is a rectangular matrix of circles. I identify the fault because suddenly he observed that instead of circles there are ovals. What could it be due to?
How can I solve it?

I would disconnect the servos from the machine and see if you still get a servo fault
just to eliminate mechanical problems