That looks remarkably similar to the Warco unit I bought & fitted a couple of years back, Might be worth checking out

Regards Mike.

I would recommend speaking to Machine DRO. They sell a number of adapters to connect different systems and have a lot of experience in this area.

I don't think the internal error code on the display unit can be caused by the scales being faulty or not connected. From your connector pinout it looks like the sales are pretty standard quadrature scales with the "R" signal being for a pulse which is generated as a reference point near one end of the scale travel. The "A" and "B" signals will be the quadrature outputs. As these signals are not at any fixed value the display unit has now way to know if the scales are faulty. Your scales are single ended output. If they were differential output they would have A+ and A-, B+ and B- and R+ and R-. As the scales are supplied with 5 volts the logic levels will be 0 and 5 volts. (These signal levels are often called TTL levels.) With power to the scales if you look at the "A" or the "B" signals with an oscilloscope you should see them changing state as the scales are moved. You will also need to know how many pulses per mm of movement that your scales provide. This can noemally be set with a setup function on the display unit. If you try to get into the setup function of your display then you may be able to see what the pulses per mm setting has been set to.I agree that Machine DRO will be able to tell you if their display units are compatible with your scales

Les.

Les,

The fault is a failed display startup self test both with and without the scales being fitted.

He's trying to match a new display to his existing scales

Wrong button

Edited By duncan webster on 16/02/2023 19:55:18