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Rev. Counter

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Howard Lewis14/07/2022 21:37:51
7227 forum posts
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Not having any expertise in electronics, assumed that an electronic tacho as used on our machines would be a counter of the pulse produced for each revolution of the rotating member, whether on a lathe or a mill.

If that is the case, the magnet passes the Hall sensor and produces a pulse (Sine wave form? ) one per rev, which the board counts against a time base and displays the count per minute.

Presumably the original sensor still has the pin out intact, so a replacement, wired in the same configuration, should function in the same way.

If the machine is belt driven, there will be a chart showing the speed for a given pulley /belt layout for a single phase motor running on 50 Hz or 60 Hz supply.motor.

If the machine is VFD driven, and if you want to be confident of your speed read out, a separate tachometer is needed as a datum.

Howard.

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