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Calculate thread pitch and feed rates...
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Darren:
Now that is very enlightening !!

Somewhere, not that I have a cats chance in finding it, I have a small reed switch....ummm,

You started something now John.... :clap:
sbwhart:
OK Chaps

Whats a read switch look like then  :scratch:

Stew
Darren:
Stew,

A reed switch is two little strips of contact that are pulled together when a magnet is brought near to them. Usually encapsulated, mine is in a glass tube.
Very cheap and very versatile little switches.

Last time I was using one, some many years ago now, I was winding some transformer cores on a Myford 7 lathe. I used a reed switch to count the turns and a magnet simply stuck on the chuck to activate it with each turn. It was done slowly so no fear of the magnet flying off.

I used a simple 12V counter to do the, erm,,,,counting... :lol:

A couple of thousand turns is way beyond the 10 I learnt at school. So was really quite helpful.  :ddb: :ddb: :ddb:
John Hill:
Reed switches are available for home security systems, they are the little plastic switches that come in two pieces, one bit to fix to the moving window or door and the other piece that has two wires connected to it.  The one with the wires is the switch and the other has a little magnet in it, of course they work with other magnets too.

I am thinking of putting a permanent switch on my spindle, maybe at the 'far end'.
sbwhart:
Darren/John

Thanks for that, I used a reed (correct spelling this time) when I wired the alarm in my shop just didn't know what it was called.

Cheers
 :beer:
Stew
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