Toyota embroidery machine - retrofit

Hello everyone,

I need your advice on an industrial embroidery machine.
I've managed to recover a Toyota ESP embroidery machine, but it's broken down to the level of the electronic board, I have the impression that it has lost all its parameters, there's a ‘-’ on the screen and then nothing.

I'm going to retrofit it and drive it with linuxcnc.

Following the dismantling of the casings, I have a few questions:

-1: I have a DC 30W servomotor with 500 pt encoder in single ended 5V. and at the end of my axis I have a Copal JC30S potentiometer. Does this potentiometer correspond to a tacho (speed control)?

 

 

 

-2 : On my motor, the maximum voltage is not indicated. To power my machine, I use a power supply that mixes 5V and 24V DC. I assume that its motors are powered by 24V DC, correct? Do you know of any DC driver references for this motor power with tacho (if the potentiometer has one) 

 

 

I think the potentiometer is being used as an absolute position feedback device.

(probably meaning that the long shaft only turns a few times)

 

OK, I understand.

But what is the operating condition of this potentiometer?

- Is it precise enough for me to use it for position control and the encoder for speed control?

- it only allows the machine to be homed without moving to a homing switch (the embroidery machine doesn't have a home and limit switch).

- does it allow homing and limit switches? If so, would a potentiometer for travel limits be useful in addition to the soft limit, or is the soft limit enough?

 

Not sure how the potentiometer was used but It could replace home/limit switches
(and since it's absolute no homing cycle would be needed at startup)

The encoder is possibly used for both position and velocity feedback

Is there another motion axis?