Laser not firing at Full Power?

[UrsidaeSVG]

Hey there, now since a few months i got a 3018Pro CNC with a 7W 450 nm Blue Laser. Many tests later it seems that i can't cut with full Power in LaserWeb.

If i use "EngraverMaster" the 4mm Beech Plywood cuts perfectly through in less cycles.

Settings i use: 100% Power 6 Passes 0,6mm Pass Depth 2mm/sec Cut Rate

With these settings i created a .nc file and tested it on EngraverMaster with these Results:

Here are my GRBL Settings: $$ $0=10 $1=254 $2=0 $3=2 $4=0 $5=0 $6=0 $10=0 $11=0.010 $12=0.002 $13=0 $20=0 $21=0 $22=0 $23=0 $24=25.000 $25=500.000 $26=250 $27=1.000 $30=1000 $31=0 $32=1 $100=800.000 $101=800.000 $102=800.000 $110=2500.000 $111=2500.000 $112=1500.000 $120=160.000 $121=160.000 $122=48.000 $130=300.000 $131=180.000 $132=44.000

In LaserWeb i set the Max Power to 1000 and tested with 255 and 9999 with no change.

Any ideas what could be the issue?

[arthurwolf]

Are you sure the Z doesn't go to a different position in each case/the focus is the same ?

On Thu, Dec 5, 2019 at 3:56 PM Ursidae notifications@github.com wrote:

Hey there, now since a few months i got a 3018Pro CNC with a 7W 450 nm Blue Laser. Many tests later it seems that i can't cut with full Power in LaserWeb.

If i use "EngraverMaster" the 4mm Beech Plywood cuts perfectly through in less cycles.

Settings i use: 100% Power 6 Passes 0,6mm Pass Depth 2mm/sec Cut Rate

With these settings i created a .nc file and tested it on EngraverMaster with these Results: [image: LaserWeb] https://user-images.githubusercontent.com/58560529/70246082-6d44e480-1777-11ea-84cc-44465c744437.jpg

Here are my GRBL Settings: $$ $0=10 $1=254 $2=0 $3=2 $4=0 $5=0 $6=0 $10=0 $11=0.010 $12=0.002 $13=0 $20=0 $21=0 $22=0 $23=0 $24=25.000 $25=500.000 $26=250 $27=1.000 $30=1000 $31=0 $32=1 $100=800.000 $101=800.000 $102=800.000 $110=2500.000 $111=2500.000 $112=1500.000 $120=160.000 $121=160.000 $122=48.000 $130=300.000 $131=180.000 $132=44.000

In LaserWeb i set the Max Power to 1000 and tested with 255 and 9999 with no change.

Any ideas what could be the issue?

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勇気と気分

[UrsidaeSVG]

Jep, focus is always checked before lasering.

[arthurwolf]

Are you sure they really go at the same speed, etc ? Maybe post the first 100 lines of each file to pastebin.com and give us the links here ?

On Thu, Dec 5, 2019 at 4:25 PM Ursidae notifications@github.com wrote:

Jep, focus is always checked before lasering.

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勇気と気分

[UrsidaeSVG]

I use the same file for both programs. I set up the task in LaserWeb and saved it as .nc.

https://pastebin.com/y8gsS8hD

Double Checked the Speed. It's 120mm/min in EngraverMaster and 2mm/sec in LaserWeb.

[cprezzi]

What controller and firmware are you using?

[UrsidaeSVG]

Arduino Uno and GRBL 1.1

[cprezzi]

Can you please try if it makes a difference when using M3 instead of M4? I guess the adaptive laser PWM limits the power you reach, because the line segments are short and your accelleration is low.

[UrsidaeSVG]

Tested and it did not really make a difference.

[ghost]

I was having problem like yours anf found my solution today. (Maybe it's not that but worth telling if it helps resolve your problem...). My problem was the opposite. When at 2%, the laser was almost at full power. I found that my GRBL pwm settings was completly wrong (my PWM frequency was at something around 2 Mhz when my laser was expecting 20Khz). So I changed the GRBL board settings to generate a proper PWM frequency for the laser. Maybe you could try to look for this...