I’m about to pull the MiniRambo off the drop table and replace it with the Rambo and endstop wiring. While I do so I’d like to incorporate a touch plate so I can nail my tool changes finally. If you all saw how I do them currently you’d wonder how I ever got good results…
What’s the best way about this according to the collective here? One of the tall disc and alligator clip things form Amazon? A diy moveable piece like Jeffe’s spatual plan? A piece milled in flush on the work surface and hard wired into the table/board?
I use a magnet and some metal tape…ghetto fab baby. I do have a few super fancy high tech one here that I have not tried out yet…ghetto works so well I never walk up the stairs to get the fancy ones.
I have to admit I haven’t looked deep enough into it yet in terms of how they are wired up. I assume the cutter contacting the metal closes the circuit to the end stop. So one wire from the board goes to the metal plate, the other wire has an alligator clip that you clip to the cutter? Is it that ‘simple’?
Thanks gang. Then once I know the thickness of the plate I add a start code that alters the z axis by that amount and I’ve got perfect zeroes for the rest of my days?
The end stop will trigger at .8 but set the machine’s coordinate (understanding) to 0. By using G92 z0.8 you’re telling the machine that it’s ACTUALLY at 0.8 right ‘now’ and so any following gcode will be reduced by 0.8?
Would M851 Z-0.8 do the same thing? And if so, why use one over the other?
i don’t think so. i guess it dedicated to hint machine how to interpret probe coordinates when you perform bed leveling with G29. I think G29 not useful for CNC application
Imho, foil isn’t best solution. It’s easy to get it creased and you can’t be sure that it lays flatly on the surface. I guess you can’t just hold by one hand or just drop and make homing.
I cut a square of aluminum foil out of the flat bottom of a heavy duty disposable pan, like from Thanksgiving. To make the connection I soldered to a paperclip and slipped it on the foil. So, far working great!