this has been going on for 3 weeks now, getting progressively stranger.
started out spindle would just stop in middle of program, would have alarm saying spindle override is off. tap on the switch and it would start back up.
replaced the pot, initially then wouldn't work at all??. put old switch back in and it worked, had parts and smarts send another switch
well put it in, ran for 4 days started doing again, only no alarm.
called a electrical engineer friend of mine to come over with his meter, couldn't find anything wrong as far as connections.
as it is now after re seating all connections, the spindle comes on at half what ever the programmed speed is. and the spindle override has no effect other than on off.
the mtb board seems to have maybe a grounding problem though, we had the front panel off and the spindle running. was just wiggling wires and the spindle would stop
but would do same thing if you sort of put just finger pressure any where on that board??
going to call zps tomorrow. just lookin for ideas. got to try to find correct set of schematics for my machine???
thanks in advance