What type of probe.

[johngoodrich]

I'm looking at possibly getting one of these proves
https://www.ebay.co.uk/itm/CNC-3axis-digitizing-touch-probe-SET2-tip-3mm-NPN-NO-NC-MACH3-scripts/203027707402?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D225119%26meid%3Da76888a847c34 612a17619ce20af9435%26pid%3D100675%26rk%3D1%26rkt% 3D15%26mehot%3Dnone%26sd%3D203027707402%26itm%3D20 3027707402%26pmt%3D1%26noa%3D1%26pg%3D2380057%26br and%3DUnbranded&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A0c371689-c85a-11ea-b07d-1a5990b66da3%7Cparentrq%3A5e00a1cc1730ad397ea3fd38 fffc4c42%7Ciid%3A1

What would be the best type to get, normally open or normally closed. I will get it in 24v to suit my controller. I am currently running mach 3 bit will be switching to uccnc soon.

Thanks all

[driftspin]

I'm looking at possibly getting one of these proves
https://www.ebay.co.uk/itm/CNC-3axis-digitizing-touch-probe-SET2-tip-3mm-NPN-NO-NC-MACH3-scripts/203027707402?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D225119%26meid%3Da76888a847c34 612a17619ce20af9435%26pid%3D100675%26rk%3D1%26rkt% 3D15%26mehot%3Dnone%26sd%3D203027707402%26itm%3D20 3027707402%26pmt%3D1%26noa%3D1%26pg%3D2380057%26br and%3DUnbranded&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A0c371689-c85a-11ea-b07d-1a5990b66da3%7Cparentrq%3A5e00a1cc1730ad397ea3fd38 fffc4c42%7Ciid%3A1

What would be the best type to get, normally open or normally closed. I will get it in 24v to suit my controller. I am currently running mach 3 bit will be switching to uccnc soon.

Thanks allHi John,

I am thinking of making one of these myself.

Just to see if i can.

Maybe a fun project.

Grtz Bert.




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[m_c]

I always prefer NC as it helps avoid problems from disconnection, be that operator error, or some kind of physical failure.

However touch probes are typically NO internally due to how they work. Any NC/NO flipping has to be done via electronics, but even at that, having the flipping done in the probe itself still gives you protection from any disconnection problem.