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Hi im using a K40 with c3dmini and Grbl firmware and latest lightburn. I just switched to grbl and the files i ran perfectly on smoothie, now come up with this error the gcode isnt going out of bounds is there another reason?

Below is the gcode

; LightBurn 0.9.02
; GRBL device profile, absolute coords
G00 G17 G40 G21 G54
G90
M4
; Cut @ 7 mm/sec, 60% power
M9
G0X10.57Y10.3
G1X287.9S600F420
G1Y114.3
G1X10.57
G1Y10.3
G0X10.57Y114.02
G1X287.9
G1Y218.02
G1X10.57
G1Y114.02
M9
G1S0
M5
G90
; return to user-defined finish pos
G0 X0 Y0
M2

Your finish position is X0 - is it possible the return to zero is hitting the limit switch? Smoothieware doesn’t have soft limits enabled, so that could possibly be it.

You should also check to see if you have a workspace offset enabled - type $# and hit enter in the console - make sure what it emits for G54 is all zeros.

Ok i tried th $# this is the result

$#

[G54:0.000,0.000,0.000]

[G55:0.000,0.000,0.000]

[G56:0.000,0.000,0.000]

[G57:0.000,0.000,0.000]

[G58:0.000,0.000,0.000]

[G59:0.000,0.000,0.000]

[G28:0.000,0.000,0.000]

[G30:0.000,0.000,0.000]

[G92:0.000,0.000,0.000]

[TLO:0.000]

[PRB:0.000,0.000,0.000:0]

ok

Starting stream

ALARM:2

On or near line 11:

Stream completed in 0:00

[MSG:Reset to continue]

the gcode its producing is

; LightBurn 0.9.02
; GRBL device profile, absolute coords
G00 G17 G40 G21 G54
G90
M4
; Cut @ 7 mm/sec, 60% power
M9
G0X11.33Y1.14
G1X288.67S600F420
G1Y105.14
G1X11.33
G1Y1.14
G0X11.33Y104.86
G1X288.67
G1Y208.86
G1X11.33
G1Y104.86
M9
G1S0
M5
G90
; return to user-defined finish pos
G0 X0 Y0
M2

Im still none the wiser really its odd how the same program doesnt work on grbl. Anymore ideas?

Ok i managed to get it to cut by removing the soft limits form the machine settings. Will this cause an issue in the future or is it ok to carry on as is?

I notice one of the lines says “G1 Y208” - That would be out of bounds for a 300 x 200 machine like the K40. If you haven’t changed the travel limits in the machine, that would be why you’re getting the alarm.

I usually tend to use the full space of the board so sometimes its just a trim cut, ive always done it like that since i bought the c3dmini and started using lightburn (excellent software BTW).

Goign to test today with the soft limits off and see if it runs ok, then start saving for another years license lol

What I’m getting at is that the board itself has settings for the dimensions of the machine to use with soft limits. Look at the “Max Travel” values for the X & Y axis in the machine settings, or look at the $130 and $131 settings from the console. The defaults for those are 300 x 200. If you’re trying to use more space with soft limits enabled you’ll need to increase those.

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