What kind of limit/home switches so you guys use?

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10 Mar 2010 19:57 #2266 by Davenc
The magnetic ones or the standard mechanical ones? I've seen the small ones on ebay at $16 for 20 of them. Any of you guys have pictures of how you mounted them? I'm planning on using the standard configuration that is in the documentation for EMC2 on wiki which uses a separate pin on the parrallel port for each axis.

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10 Mar 2010 20:54 #2267 by tenaja
If you need safety, you need to use normally closed switches. That way if the wire breaks, it fails to a safe mode rather than allowing a dangerous crash.

Having said that, I've used both kinds. Recently I got some cheap SMC reed switches with LED's in them. They are normally open, but for the Sherline lathe I am not concerned.

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10 Mar 2010 21:42 #2268 by alex_joni
don't forget optical ones..

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10 Mar 2010 22:51 - 11 Mar 2010 02:38 #2269 by tenaja
Optical switches are great in a clean environment--I wired one up a couple months ago. If the lighting is not consistent or if dirt or machining chips can get on it, you may have inconsistent results.
Last edit: 11 Mar 2010 02:38 by tenaja.

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11 Mar 2010 13:08 - 11 Mar 2010 13:09 #2276 by BigJohnT
That's why you always choose a normally closed switch for your limits. I have micro switches on my plasma cutter and proxes on my lathe (factory).

This shot shows my Z axis limit/home switch (rear one) and my floating torch holder touch off switch.



John
Last edit: 11 Mar 2010 13:09 by BigJohnT.

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