Hi all, I’ve been attempting to write the script to leave in Estlcam for bit changes on my Primo. I don’t have working end stops, so this has been a bit of a challenge.
I ran through several iterations this afternoon, but since it’s dark and late for noise, I thought I might share here and get some feed back.
Here’s what I’ve come up with (code below).
There are two weakness, that I can see:
- The Zero point (set in Estlcam before generating the gcode) needs to be off of the work piece. I’ve found that with a 1/4" bit, the amount I can raise the gantry over 3/4" material doesn’t allow me to get the bit out. This means that for a one-off item, there’s some guessing about where the material goes and where clamps can fit.
- After the bit change, the machine returns to where it was, and zeros the Z axis (using the very cute Tiny Touch Pad). But this assumes that the material at this point in space is still the original height.
Any thoughts are appreciated…
M05 ; PID, Stop spindle
G00 Z05 F500 ; Raise Z probe off of surface
G60 S0 ; save current position, with z axis lifted
G00 X0.0000 Y0.0000 F2100 ; Goto home position [note: home needs to be off of the work surface]
M00 ; Wait for LCD button press - button press means the bit has been changed
G61 S0 ; return to saved position
G28 Z ; Home, w/zprobe
G92 Z0.5 ; Account for probe thickness (set your thickness)
G00 Z5.0000 F500 ; Raise Z probe off off of surface
M00 ; pause for LCD button press - button press means that everything is good to go
M03 S17000 ; PID, set spindle speed