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Wippen is right on again, the hydraulic solenoid valving (on those generation Mazaks at least) is standard DIN.

On all of my hydraulically-indexed Mazak lathes, I install a flow control valve in...

Wonder if your tech could de-solder a couple of similar chips that your machine doesn't use, then re-purpose them for your chuck open/close?

Most boards are loaded with microchips, and lots of...

I agree with wippin', the 24v has to be within +/-5% variance, at the most! The ice cubes probably won't close reliably on 21 volts.

And I too have always measured 24.XX volts on the 24v...

There is a parameter to set whether the control looks for chuck open/close confirmation from proximity switches.

If your machine doesn’t have the prox switches for chuck cylinder stroke (a lot...

Marc,

You can swap out ice-cube relays to test them.

Remove one from a function you're not currently using (tail quill FWD, coolant ON, machine light ON...), plug into your questionable chuck...