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Rev counter for miller

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seadog:
I fitted one of these to my lathe last year. It worked fine for a few monthe and then one day it wouldn't register. I suspected the pickup and mailed the seller. After much toing and froing they decided to send me a replacement display. Whilst waiting for the replacement, for some reason, I tried turning the magnet over. Lo and behold it worked :doh: It's still working some 14 months later, and I now have a spare display. I bought a new sensor for about £3 and this will eventually find its way onto my bench drill when I compete the three conversion for it.

Will_D:
 And as I like blue displays I ordered a couple of temperature displays, one for the old Myford Motor and one for somewhere else like the front head stock bearing or maybe the counter shaft. Oh Eff!  Should have ordered 3 temp. displays.

Pictures to follow!

Btw: Why fit these? 'Cos Santa is bringing me a 2 axis DRO for the old Myford so I don't want to burn out anythging!

SteveT:
I got one about 6 months ago for my mill at the price its great it came with a magnet, which was a small disk and no good for my application but I had no problem getting a replacement magnet from Ebay for pence.  :D

jcs0001:
Can the magnet be mounted on an aluminium pulley without major work?  I have a taig mill and the pulleys are stepped aluminium pulleys.  Sure would hate to have the magnet come off at 5000 rpm or so :D

Any thoughts would be appreciated. 

Thanks,

John.

seadog:
You could mill a small pocket in the pulley and then carefully peen the edge in two or three places. Remember, though, that these magnets are very brittle.

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