N0VUSUN and Mitsubishi-D700-SC

[Doddy]

Can I ask you to confirm a couple of things that I've read/interpreted/misinterpreted...

1) When measuring the voltage on the relay you're looking at the side connected to the NVEM? And what you said in the last post was that when "on" the voltage here - at the NVEM side of the relay (pin 13 on the relay) is 24V? The relay LED is ON (dim)?

2) When the spindle is intended to be "off", if you measured the relay (pin 13) voltage it is 24V? The relay LED is OFF?

3) When you connect the NVEM output from to the relay (pin 13) to 0V the relay switches, and the relay LED is ON (bright)?

These first two appear contradictory to me - the side of the relay connected to the NVEM must drop by the forward voltage of the LED for it to light up - even dimly. I might expect the NVEM side of the relay coil to be 24V when OFF, but somewhere less than 22V when ON (a red LED is typically around 2V forward voltage drop). If you can confirm this behaviour then I can solve your problem. But if you're saying that the LED comes on (dimly) for condition (1) and off for condition (2) without the voltage on that side of the coil changing then I cannot understand the physics at play.

If you confirm that the voltage on pin 13 of the relay drops at least a couple of volts when the relay is supposed to be "on" then I'll get something in the post for you tomorrow to fix it.