Could someone explain what I’m doing wrong. I bought CR Falcon 10W laser and it seem I can’t have full power from it. There is no problem when I’m engraving. But if I try to cut somethin I just can’t have full power. $30=1000 $31=0 $32=1. S value max =1000. I have tried lightburn and laser grbl. Here few examples. Here below engraving f6000mm/min s60%. And above “cutting” f250 s98% but it seems the laser is barely on….. Edit: if I send M3 S1000 to the consol I have full power.
Easiest place to start is probably to save the G code that LightBurn is creating and check to make sure that it’s as expected. You can save it with the “Tallenna GCode” button and then open it in Notepad (or Notepad++).
Only thing that comes to mind immediately is variable power due to speed, but at 250mm/min speed you’d have to have some pretty slow acceleration settings for it to have an impact. I guess check your acceleration settings, too.
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; LightBurn Pro 2.0.02
; GRBL device profile, current position
; Bounds: X0 Y0 to X61 Y78
G00 G17 G40 G21 G54
G91
M4
; Cut @ 350 mm/min, 100% power
M8
G0 X61Y0
; Layer C00
G1 X-61S1000F350
G1 Y78
G1 X61
G1 Y-78
M9
G1 S0
M5
; return to starting pos
G0 X-61Y0
M2
So you’ve only got 30.5mm to accelerate. I don’t know what your accels are, but I expect you’re being power limited for most of the time by variable power control as you’re likely moving well under the 350mm/min for most of the travel. You could turn off variable power control in the LightBurn layer settings if you want (M3 mode vs. M4 mode), but then you’re going to be applying a variable amount of power inversely proportional to your acceleration. I wouldn’t do this.
I would check your acceleration settings and increase them if reasonable to do so. If you can’t, and you need to cut such small shapes, then you’ll need to resort to multiple passes.
LightBurn is generating the correct code.
Also, air assist to clear the cut, and 2 or more passes is probably required to avoid charring in 1/4” plywood.
It’s the console output of the $$ command that you care about. $120 and $121 are the X and Y acceleration values.
Can I find it from setting without plugging the laser to the computer? I’m at home and the laser is 6km from me
Only if you have a backup of the configuration file or settings as they are on the hardware. LightBurn does not control the settings of the controller. It does have the option to sync the settings to LightBurn for preview time estimate use, but you’d have had to have sync’d it manually.
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Thanks from your inputs. I’ll buy air assist ( and honeycomb)if I manage to cut something. The plywoods were 2-4mm. I have tried multiple passes up to 5 with no good luck. I have also treid M3 and M4 with same results. I was also wondering if there is some kind of power limit as when I tried lasergrbl I was able to see current S-value from UI and it was roughly 100. I’ll check accelarations as soon as possible.
S100 is 10%, that will be essentially nothing if your machine controller is configured for S max of 1000.
That’s the thing… you need the air to be able to cut something like plywood.
“roughly 100” sounds like variable power control in action to me.