Does “auto squaring” happen every time the machine is homed, or is it a separate function?
If I XYZ home the machine and the limit switches are
not correctly calibrated (or some debris gets in the way of the switch), will the machine stop both Y steppers when the first switch is triggered, or will it plow on with the un-switched motor and un-square my gantry?
I see, it seems that this happens every time the machine is homed.
IMO this is not a desirable behavior to be the default functionality, because of the potential for a switch failure to cause misalignment.
I think I will put a SPST relay in place of the Y2 switch, and proceed to calibrate the physical Y2 switch as usual, with a toggle to enable or disable the linked relay mode for calibration after a crash.
In my experiences the switch failures will cause enough racket and an alarm to keep you from proceeding. There is a “search distance” where the machine looks for a limit switch as compared to the others and it will alarm if that isn’t met.
I’ve yet to replace my original limit switches, vut had to take them apart and clean coolant residue off of the contacts due to 2 of them failing to make contact. Believe me, you’ll know if it doesn’t see a limit switch during homing. Plenty of banging from the steppers to get your attention.
As long as the switches and stops are set appropriately I don’t mind the auto squaring though. The few times I’ve pushed it too hard and had a part move or spindle stall the auto squaring has put everything back within .0005" over 3" as I had set it originally. The only manual squaring I’ve had to redo after all that was the tram going out a couple thousandths after a spindle stall in a heavy cut.
That would work but if you every skip a step it wont be square when it it homes and you wont know, you will also need to autosquare after each power cycle as the positioning is lost. Youd be better off investing in more reliable limit switches.
Amos- did you wire them in yet and if so whats the wiring? Because of the led I assume the polarity absolutely matters. But I’m not sure what is positive vs ground on the stock wiring.
im pretty sure there is black and red wires, but its easily checked with a multi meter otherwise.
