Re: Tach pickup Location
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From: [email protected] <[email protected]> on behalf of John Dammeyer <johnd@...>
Sent: Wednesday, December 20, 2023 11:47:30 PM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Tach pickup Location ?
For my 1942 single lever Heavy 10L I didn’t want to muck up the gear cover so I pressed a rare earth magnet into the opposite end of the bearing clamp hole and then put a small TO-92 size hall sensor in a plastic tube shoved into a bracket.? One pulse per revolution is fine for my Electronic Lead Screw which shows spindle RPM or if the tool tip is calibrated from the centerline it’s possible to read SFM. ? From: [email protected] [mailto:[email protected]]
On Behalf Of Gary Johnson via groups.io ? This is for a heavy 10L, but maybe it will give you some ideas. I used 1/8" dia rare earth magnets (four), mounted in 3/8" dia aluminum pucks epoxied to the gear. They are sized so that the magnets would pass very close to the Hall-effect
sensor. The sensor was mounted on an aluminum tee bracket affixed to a spot I flattened off and added a tapped hole. This sensor was part of the accessories offered with the old MachTach kit which unfortunately is no longer made. |