Lathe Tach

[Kernbigo]

4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN
( 301805369305 )
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Has anyone installed one of these, could use some advice, one thing where to mount the magnet, not much clearance on the needle bearing take up nut. I have a south bend 9" wide bed( Thanks)

 

[mattthemuppet2]

i have one of those on my Atlas 618 and it works a treat. magnet is on the bearing collar between the bearing and the spindle gear and i glued a magnet onto the pick up to stick it to the head stock. it does get knocked occasionally but it's easy to move back. i like it allot - looking forward to putting one on my drill press

 

[TOOLMASTER]

how did you power yours?

 

[mattthemuppet2]

some random 12V wall wart from my "might be useful one day" stash. It only needs 20mA or so and from 9-15V, so most likely you'll have something lying around or Goodwill will have one for $1 or so. I stripped mine of its casing so I could wire it direct to the on-off switch of my treadmill board.

 

[Kernbigo]

anyone have pictures of there mounting?

 

[mattthemuppet2]

here's mine, Greatwhite has one on his Atlas (bigger) from memory too


you can just see the 12V wall wart in the bottom right of the picture

shonky mounting. I'll get round to a better mount at some point, but this works fine for now and I have plenty of other projects to do first

 

[T Bredehoft]

Do these RMP Hall units come with a magnet, or if not how much magnet is needed? I have access to some 1/4 dia, .100 thick, rare earth magnets, would these work?

 

[mattthemuppet2]

I'm pretty sure both mine did, although the 2nd one is still in its packet and I haven't looked at it for a while. Any rare earth magnet should work just fine.

 

[T Bredehoft]

I'm pretty sure both mine did, although the 2nd one is still in its packet and I haven't looked at it for a while. Any rare earth magnet should work just fine.

Thanks, Matt. My mill lost it's RPM capability, power surge, I think. It reads 0 at any speed. I'm going to order a whole unit then try to wire the reader into the old unit.

 

[mattthemuppet2]

you're welcome and that sucks Is it one of these units that blew or one integrated into your mill (like one of the small PM25 style mills?). Mine reads 0 whenever the pickup gets knocked out of position, so it may just need a new pickup if it's an integrated one. They're really cheap, so that might be worth checking out before buying a whole new one.