Warco 16B Mill Tachometer

[Clive Brown 1Participant @clivebrown1]

The tacho on my Warco 16B has stopped working. The display lights up but the reading remains at zero. I can find virtually no information on the circuitry. Just an on-line schematic showing the display connected to a "controller pcb"

The mill is otherwise working as normal.

Any suggestions for investigation / repair gratefully received. If not then it's a call to Warco tomorrow.

[Clive Brown 1Participant @clivebrown1]

[not done it yetParticipant @notdoneityet]

Is it likely the transducer has moved, or something similar? Best to check the simple things before delving into the electronics.

[Clive Brown 1Participant @clivebrown1]

Posted by not done it yet on 28/01/2021 19:45:41:

Is it likely the transducer has moved, or something similar? Best to check the simple things before delving into the electronics.

Thanks. I may be wrong, but I think that the signal is derived from the PCB, it's a brushless motor BTW. There doesn't appear to be a pick-up near the spindle.

[Bo’sunParticipant @bosun58570]

My WM250's motor is brushless and has a mag pick-up on the lathe spindle.

[Clive Brown 1Participant @clivebrown1]

Doh!, just realised my last comment was nonsense. The machine has two belt positions, so the tacho must sense direct from the spindle. I'll have another look.

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