Laser position messed up

[Kyriakou (Andreas)]

Hi guys, I have been having issues when trying to print and cut on paper and I can understand why this is happening. Basically I have followed through the print and cut video setting the wizard with both reference points. All good to this point, but when I go to preview my design does not show at all. Something that I have noticed is that the laser position in the lightburn software is messed up, and the job origin is also messed up. I do have it set to absolute coords.

Actually why does my laser does not center it self in the center of the actual working area? If that make sense…

[Kyriakou (Andreas)]

[Kuth (Luis Jardim)]

Maybe you found a solution here:

Coordinates & Origin - LightBurn Documentation

[ednisley]

@Kyriakou

the laser position in the lightburn software is messed up, and the job origin is also messed up

Apparently Snapmaker has been messing with the GRBL and G-Code conventions everybody assumes should work:

Announcement: Snapmaker firmware updates have affected LightBurn usage

Hi everyone! Just wanted to make you all aware that all Snapmaker devices have recently updated their firmware, and this has affected LightBurn communications. Please see the below post for details.

So it may be broken as intended …

[Kyriakou (Andreas)]

Is there a way around Absolute coords for print and cut? Like a way to set reference points and still manage to cut a specific location?

[ednisley]

@Kyriakou

a way around Absolute coords for print and cut?

You might be able to set a User Origin at the machine’s home position and use that mode, but I have no idea if that will (or ever did) work on a Snapmaker.

@berainlb: Am I overlooking the obvious, like a coordinate system offset affecting everything else?

[berainlb (PY)]

What Snapmaker device do you have?

You list GRBL as the controller type in your profile. If you indeed have a GRBL based Snapmaker device can you run these commands in Console?

$H
$I
$#
?

[Kyriakou (Andreas)]

I run an Snapmaker Ray 40w. It’s GRBL based, I did run that code and I think it has reset the home position or something like that! But still haven’t been able to do a print and cut. I have taken a video showing the whole procedure… maybe you can spot something that I do wrong…? But I can not upload it here though

[Kyriakou (Andreas)]

Ok I have made a progress! Now, the machine working area does not much the lightburn working area. How to fix that?

I have manage to set the wizard and found it in the preview window. When I started the job it did the indeed shape cut but in a completely wrong location.

[berainlb (PY)]

@Kyriakou

I did run that code and I think it has reset the home position or something like that!

These commands wouldn’t have reset any persistent configuration. These should only output data. However, the first command homes the machine which would re-establish your origin position. If that gave you different results that makes me think that you’re losing steps somehow.

Are you by chance moving the laser head by hand at any point? If so, that’s not going to work as that will cause motion that’s not tracked by the controller. Use the jogging controls in Move window or on an offline controller exclusively after the machine has been homed.

If that’s not the problem, then run these commands and return the output here please.

$H
$I
$$
$#
?

@Kyriakou

I have taken a video showing the whole procedure

You can host the video at a 3rd party site and link here.

@Kyriakou

Now, the machine working area does not much the lightburn working area. How to fix that?

What is your expected machine area?

Can you take a screenshot of Edit->Device Settings?

[Kyriakou (Andreas)]

Hi,

I run the codes, it didn’t do anything as far as I can tell… same outcome as before. I uploaded a video that I took while going through the wizard to set up my reference points and got a link with We Transfer.

Snapmaker Ray Absolut coords

Here is a print screen with my Device Settings.

By the way thank you guys for your time trying to help me out! Much appreciated!!

[Kyriakou (Andreas)]

Another think, here is a screen shot of the lightburn. Please notice the laser position, note that its in Absolut coords. And the second screen shot shows the actual laser position. The two of them do not correspond. Isn’t that an issue as well?

[berainlb (PY)]

@Kyriakou

I run the codes, it didn’t do anything as far as I can tell

I need you to run the commands, then once the commands return output to the Console, copy the text output and return that in a response here. I need to see the output.

@Kyriakou

Here is a print screen with my Device Settings.

It seems the upload failed. Can you try again? Make sure that the upload complete before pushing the Reply button.

@Kyriakou

Please notice the laser position, note that its in Absolut coords

Position of laser head and Absolute Coords is not directly correlated. However, I suspect that your laser is not configured properly. It seems that the Ray is shipping with an incorrect configuration. I have not seen anything definitive that explains how it should be setup. There are a number of Topics here with the same problem.

Take a look at this one.

Snapmaker Ray - no crosshairs when framing

I’m looking back at a separate topic with a Snapmaker Ray. I’m not sure what’s going on but it seems like these machines are not getting shipped with the proper configuration or it’s not clear how they’re meant to work. The conclusion in that Topic was that machine homed top-left with origin at bottom-left. In order to accommodate this a work offset was applied. Let’s reproduce that. Can you run these commands in Console: G10 L2 P1 X0Y-400 $10=0 Then home the machine. Test jogging controls…

I’d suggest not simply applying the listed fix as your conditions could be different unless you first work through the entire Topic and confirm that you have the exact same situation and output from the commands I requested earlier.

[Kyriakou (Andreas)]

Its strange, from my site it seems that the screen shots have been uploaded.
I’ll try again below with device settings

Here I have run the commands and below is the output

$H

$I

$$

$#

?

<Idle|MPos:0.000,0.000,0.000,0.000|FS:0,0|WCO:0.000,0.000,0.000,0.000>

ok

[VER:V1.6.8.20240124:]

[OPT:PHSW]

[I][PLAT]Machine: Snapmaker Ray Controller

[I][WIFI]Mode=STA:SSID=:Status=Not connected:IP=0.0.0.0:MAC=34-85-18-8C-54-FC

ok

$0=1

$1=100

$2=0

$3=2

$4=0

$5=0

$6=0

$10=1

$11=0.006

$12=0.002

$13=0

$20=0

$21=1

$22=1

$23=1

$24=300.000

$25=3000.000

$26=250.000

$27=2.000

$30=1000.000

$31=0.000

$32=1

$100=80.000

$101=80.000

$102=100.000

$103=888.889

$104=100.000

$105=100.000

$110=30000.000

$111=12000.000

$112=1000.000

$113=1500.000

$114=1000.000

$115=1000.000

$120=2000.000

$121=200.000

$122=200.000

$123=500.000

$124=200.000

$125=200.000

$130=600.000

$131=400.000

$132=300.000

$133=3600.000

$134=300.000

$135=300.000

ok

[G54:0.000,0.000,0.000,0.000]

[G55:0.000,0.000,0.000,0.000]

[G56:0.000,0.000,0.000,0.000]

[G57:0.000,0.000,0.000,0.000]

[G58:0.000,0.000,0.000,0.000]

[G59:0.000,0.000,0.000,0.000]

[G28:0.000,0.000,0.000,0.000]

[G30:0.000,0.000,0.000,0.000]

[G92:0.000,0.000,0.000,0.000]

[TLO:0.000]

[PRB:0.000,0.000,0.000,0.000:0]

ok

ok

[berainlb (PY)]

This puts you in the same position as the others.

Try running these commands. Then test again.

G10 L2 P1 X0Y-400
$10=0

[Kyriakou (Andreas)]

I thing it worked!!
I will try a testing to make sure. Do i need to run this codes every time I open lightburn though?

[berainlb (PY)]

Nice. Let us know how your testing goes.

@Kyriakou

Do i need to run this codes every time I open lightburn though?

No. The changes are permanent until you actively change them again.

[Kyriakou (Andreas)]

It worked! It totally worked! I really want to thank you guys for your help! I appreciate your time and effort so much! It means a lot to me! Thank you!!

It works perfectly, now I finally can communicate with my laser fully!