I bought a number of the prox switches to retrofit the lever micro-switches. Can't find them anywhere at the moment nor can I find who I bought them from. So sad...
I did make sure what I ordered could be wiredin the way that a broken wire would be the same as tripping the limit. Also the ability to parallel the switches so the limits at one end of each axis travel could share one input. As for connectors, I'd solder and heat shrink to cables if they weren't long enough to reach the cabinet. Inside the cabinet I'm not sure it matters if the connectors are liquid tight. The AMP CPC connectors can be acquired with an O ring to seal. And if moisture is an issue there are tubes of sealant you can squish into the connection to prevent ingress of fluids. We used the 4 conductor CPC connectors on the back of these lights. The installers dabbed a bit of sealant into the connection. http://www.autoartisans.com/rings/YVR-ORings.jpg The mistake we made with these was to make the lamps airtight and we failed miserably. Air expands as heated during the day and leaves the lamps. Then as it cools the inside because a low pressure zone and air moves back in past leaky gaskets. That is moisture laden evening air. That cycle of pumping air in and out resulted in some of the lamps half filled with water as the water condensed out. Needless to say the leaky lamps PC boards did not survive. We vented the second set and conformal coated the 1500 boards. These did not have any failures over the 5 months they were in operation. http://www.autoartisans.com/rings/Barge1a.jpg John > -----Original Message----- > From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu] > Sent: November-03-21 9:57 PM > To: emc-users@lists.sourceforge.net > Subject: [Emc-users] Prox sensors and wiring > > I have finally started stripping out the control cabinet on my cnc mill in > preparation for my retrofit. The brushed servos and > mechanical limit and home switches were wired up with crimped "bullet" quick > connect pins. I'm replacing the servos with brushless > servos, and am considering replacing the mechanical switches with inductive > prox sensors (pnp, nc type). All the old wires are sticky > with coolant and metal chips. > > So, I am interested to hear what other lcnc retrofitters have found works > well for modest priced coolant proof connectors (3 or 4 > pin), and opinions on cheap Chinese prox sensors (since the name brand ones > are so expensive, even on ebay). An example is: > https://www.ebay.com/itm/US-5Pcs-NC-PNP-LJ18A3-8-Z-AY-Inductive-Proximity-Sensor-Switch-DC6V-36V-/143861840692 > > Photos (rather unorganized) of the retrofit are at: > https://photos.app.goo.gl/yBSRVf3QAVUK39PC7 > > Thanks, > -- Ralph > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
