Web Goblin cnc has begun

[JAZZCNC]

Nice that Ian, are you going to change the script to touch down faster.?
I've set mine up so does a double touch 300mm/min first then retracts few mill's, can't remember what I set it at without checking, then does slow 75mm/min for accurate touch off in case over shoot. . . . . Works very good and one of the best things I've added to machine.

[Jonathan]

Nice indeed. Can you link me to the switch you used? I had not considered using a switch, only measuring resistance. I thought at one point of using a piece of PCB as the contact as then if something goes wrong the PCB is weak (as long as it's not FR4) and will break instead of the cutter.

Have you checked the repeatability?

Your spindle mount looks a tad flimsy to me ... only one support.

[JAZZCNC]

Nice indeed. I thought at one point of using a piece of PCB as the contact as then if something goes wrong the PCB is weak (as long as it's not FR4) and will break instead of the cutter.

Jonathan PCB works great thats what I use for quick top surface setting, very easy very quick and super accurate. . . . Doesn't even leave a mark on the cooper. You won't belive how sensitive it is.

Brilliant when combined with edge,corner and centre probing routines save hours of setting up time. Just the top of surface alone is worth the effort. . . All 5 mins it takes to make. . .:tup:

[Jonathan]

Doesn't even leave a mark on the cooper. You won't belive how sensitive it is.

That's mildly surprising. Maybe the electrons tunnel across the gap :heehee:
If I put an op-amp in between it could be incredibly sensitive, though that may not be a good thing. Combine it with averaging of the readings ... assuming the difference is actually greater than the resolution.