Laser Changes Power Between Jobs

LightBurn Software Questions
1

So I don’t know how long this has been going on but now that I have spent quite some time with my machine I noticed a very frustrating bug.

I set my cut settings for my fiber laser on a project and when I begin the engraving the setting don’t take. The machine defaults to some unknown values that aren’t displayed.

After I have adjust my cut settings, If I go into device settings, then save, then start the project, the machine uses the power I have chosen.

If I run the project again, yet again it defaults to something other than what I have set in the layer settings and I have to repeat the process.

I noticed this yesterday when I had my power set to 90 and the intensity of the cut was clearly not 90 percent but when I did the aforementioned process it engraved at a visibly higher power.

Solution’s?

2

You say the engraving works but not the cut. If you engrave at 90% power, then it likely won’t cut.

I don’t know of any mechanism that will cause this. I don’t know what you change in the Device Settings, but I can’t think of anything, off hand, that would correct this.

PWM (laser power) is determined by the control board, which you can measure with a voltmeter.

Do you mind posting the offending .lbrn2 file?

:smiley_cat:

3

By cut I really just mean the laser firing. It does it on every file. I set my settings and it fires at some other power level. I go to device setting, press okay and run the project again and it’s uses the power setting I had entered

4

When you start it and it fails, you need to measure the pwm voltage value and again after you save the device settings and see if they changed.

This is what controls the apparent laser power, this will determine if the controller or laser module has an issue.

:smiley_cat:

5

What do you mean by fail? It doesn’t fail it just operates at a power setting lower than what I have told it to be

6

If you tell it to lase at 50% and it doesn’t, I’d call that a fail. It’s either the controller or the laser module.

I know of no software way to induce this, so it makes me think hardware.

You’d have to post your file and let support examine it for any software issues. I don’t know of a setting that would help you out.

:smiley_cat:

7

Alrighty. Ill send one of my projects this evening

1 Like
8

Here you go Share - Google Drive

9

wOw what a difference.

One of the layers has bi-direction on, the other does not. Is that intentional?

I know of no way to do that.

I’d suggest you delete the sub layer and see if that changes anything.

:smiley_cat:

10

I set it up that way for some reason I cannot remember. Anyways. Yeah I’ll try with just one layer later. It’s very annoying

11

Regardless using LightBurn I need to have the multilayer option😂

12

Understand.

I’m sure Lightburn would like to know if there is a bug in the software. It should work.

I’m hoping one of the people will voice some assistance, such as @JohnJohn

:smiley_cat:

13

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