GCode Confusion

I know this isn't completely 3D Chameleon, but it is necessary to get mine working.

I'm trying to write the gcode to use my 3D UnderClippy, referencing the profile included with the 3DClippy. The part of the code that just won't work is as follows:

G0 X235; move to cut position
G91; set to relative mode
M92 X8 ; Set X steps to 1/10th (high torque)
G92 X0 ; Set X to 0

; cut off filament tip
G0 X300 F10000 ; Cut the filament quickly
G0 X-300 F10000 ; Move X back to position
G90; back to absolute mode

; set X back to normal
M92 X80 ; Restore X steps
G92 X235 ; Restore X position

Now, my problem is that any movement of X after this cannot be moved below 230. M211 reports:

Min:  X235.00 Y-30.00 Z0.00   Max:  X495.00 Y240.00 Z230.00

How do I set X's minimum back to 0?

Thanks,

Tony

5 comments

5 Comments

wjsteele

Apr 05

I think the easiest thing would be to home the X axis. Once you've restored the correct stepper values, it should have no issue with that, but I have no idea how the X Min is getting set, it's not any of that GCode.

G28 X; Rehome X Axis

Bill

wjsteele

Apr 06

Replying to

What printer is this on? That method of changing the steps has been being used on Creality and Prusa printers for years... So it is something recent that has changed.

Bill

las_vegas

Apr 06

Replying to

I'm using my own compilation of a recent Marlin bugfix version (November) on my Ender 3 Pro.

It just occured to me that I might try temporarily increasing the current of the X stepper to boost the torque during cutting. This would reduce the risk of the motor skipping during the process.

Bill

Apr 06

Replying to

Yes... that's what I do on the Sovol SV-06 version of the 3DClippy code.

Bill