I have build my laser with printed parts from this: Laser Engraver 15watts by infectedfpv26 - Thingiverse
Everthing is working fine but to get from DXF to Gcode is a big of a hassle with inktscape and the well known plugin thats why i wanted to try light burn, but i’m running in some strange problems. the size that i burn is way smaller than with laserGRBL and everthing is in mirror and i can not find the solution to my problem, can any one point me in the direction to solve it? ik using a arduino one board with a breakoutboard with steppers on it in 32microsteps mode, i’m thining i need to find it there, a do not want to change my settings in my arduino board because with laser grbl everything is working fine
@RalphU THanks for the reply,
I’m using mm and that what is configured in the file settings.
If I change the origin to left then the zero point changes from left to right and i have the zero point on the left in laserGRBL.
any one else got some idea’s ? untill now i’m unable to use lightburn and would not buy it.
the biggest problem still is that the part that I burn or cute is way smaller than the actual thing, if i look at the size in lightburn everything is the correct size but not when i burn it.
i can not find the problem because the configuration on de arduine uno board is good, LaserGRBL in working fine.
Please send screenshots and photos showing what you’re talking about. It’s not clear to me what you’re referencing in the above. Is the actual thing the dimensions in LightBurn or you’re referring to the original DXF?
Also please attach .lbrn file here for review.
i’m speaking actual size wise. if B would be 400mm then a would be someware like 75mm
You’re saying that the item that you burn is A right? So what you burn is actually coming out smaller than what is in LightBurn? If so, this is almost certainly a configuration problem. Possibly where GRBL is setup in inches.
Attach .lbrn file here please.
Also, send output from these commands:
$I
$$
$#
Waiting for connection…
ok
[VER:1.1h.20190830:]
[OPT:V,15,128]
Target buffer size found
ok
$I
[VER:1.1h.20190830:]
[OPT:V,15,128]
Target buffer size found
ok
$$
$0=10
$1=25
$2=0
$3=0
$4=0
$5=1
$6=0
$10=1
$11=0.010
$12=0.002
$13=0
$20=0
$21=0
$22=0
$23=1
$24=25.000
$25=500.000
$26=250
$27=1.000
$30=1000
$31=0
$32=1
$100=42.500
$101=42.500
$102=42.500
$110=8000.000
$111=8000.000
$112=500.000
$120=1000.000
$121=1000.000
$122=100.000
$130=900.000
$131=900.000
$132=200.000
ok
$#
[G54:-599.741,79.906,0.000]
[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]
[G28:39.139,53.799,60.000]
[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
How is the machine setup? Do you have limit switches installed? To what corner is the laser homing?
Which corner are you expecting to be 0,0?
normaly i do not home, i just place the wood on my table set the laser to the point i want to start, press the button to set zero and start to burn
from my point of view i want to have it on the bottom left to be 0,0
where to i find the .lbrn file ?
How did you arrive at these values? If you’re saying you’re in 32 microstep configuration this is almost certainly not right.
Did you set these up deliberately? I’m trying to figure out what you’re trying to do with this. Especially since you’re reporting machine position with $10=1.
The .lbrn file is the project file that you save. It’s located to wherever you save the file.
Send a screenshot of your Device Settings.
Quote:
[G54:-599.741,79.906,0.000]
…
[G28:39.139,53.799,60.000]
No i did not set it by my knowledge
Hi Thank you for the Warning, i use safey googles when i operate it no worries 
Lets get back to the configuration problem, i have safety in my mind and coverd.
quote:
How did you arrive at these values? If you’re saying you’re in 32 microstep configuration this is almost certainly not right.
my caculation:
after fine tuning i had the value of 42,500
it’s 8 microsteps, my 3D printer had 32 microsteps…
i had to wait 24 hours befor i could repost…
Are you saying you simply misquoted 32 microsteps as you were thinking about your 3d printer or do you mean you’re somehow using this machine in both configurations?
Please attach .lbrn file and send a screenshot of your Device Settings screen.
jeroen-Overall Test File-2.lbrn2 (117.0 KB)
this is one of my tests.
if i masure the size and compare it with is actual being burned there is a big size difference
Screenshot of your Device Settings window please.