One of my mills will not run programs when in the low setting. It gives the alert that the spindle is not on. It works in the high position just fine.
I did some comparison with my other mill today and checked the voltage at the high/low selector. I get 121 volts going through each leg of the switch when selecting either high or low. When the high or low side is selected, I get 47 volts on the non selected side.
Now on the other mill, I get 120 volts on each side of the switch regardless of selecting high or low. I do not get any reduced voltage reading regardless of the switch position other than off. This mill works fine and will run programs in the high or low selection.
I have been attempting to read the schematic and cannot find where the 120volts or the 47 volts on the unselected side of the high / low switch is coming from.
This switch also has to run the forward/reverse relay for the motor.
I did some comparison with my other mill today and checked the voltage at the high/low selector. I get 121 volts going through each leg of the switch when selecting either high or low. When the high or low side is selected, I get 47 volts on the non selected side.
Now on the other mill, I get 120 volts on each side of the switch regardless of selecting high or low. I do not get any reduced voltage reading regardless of the switch position other than off. This mill works fine and will run programs in the high or low selection.
I have been attempting to read the schematic and cannot find where the 120volts or the 47 volts on the unselected side of the high / low switch is coming from.
This switch also has to run the forward/reverse relay for the motor.