Just installed an MKS DLC32 on a 130W CO2 laser.
On the left, I have 20% power and a speed of 20 mm/sec.
On the right, I have 20% power and a speed of 100 mm/sec.
I don’t understand why the laser doesn’t burn all the lines when running at a higher speed.
When I run the same job on my K40, the result is perfect at the higher speed.
Could it be that the DLC32 isn’t fast enough?
I can’t tell the size of the artwork. If the art is small it might not be able to reach 100mm/s in such a short distance.
No. The DLC32 has a 230mHz clock speed, or there bout… so cpu or board speed isn’t an issue.
How did you interface the DLC32 with the is the laser power supply (lps)?
The basic two, IN and L on the lps, how are these wired to you controller (DLC32)?
It is just 30 mm high, and I can run the exact same file with perfect result on my K40 with a Cohesion board.
IN goes to S
And I do not use L, I use H istead, connected to +5V on the DLC2 board.
It looks like it’s making up for corners, using something like min/max power.
Do you have these settings?
Is this a line or vector image? Each line is the laser beam width?
I don’t use max/min. I don’t understand what you mean by vector or line? It’s an imported DFX, and each line is the width of the laser beam.
It’s a vector (line) file. The other options are a fill or image type. How the machine processes these differently.
Is it available on your machine?
If minimum is set, it might go low enough your machine won’t lase.. That’s why I asked.
Aha, that’s what you meant 
Is it available on your machine?
I thought max/min was a software setting. I only control the power from 0 to 100 using PWM from the board, driven by G-code from LightBurn.
Could it be an acceleration setting for the card, perhaps?
Is your $30 value set at 1000 along with the S-Value Max?
If these are off, then it could effect your power settings.
Do you have a mA meter for tube current?
So strange. If I lower the speed to 70 mm/sec, the result is a little bit better…
The mA meter works correct.
Can you see something odd in the settings?
$0=6 (Step pulse time)
$1=25 (Step idle delay)
$2=0 (Step pulse invert)
$3=0 (Step direction invert)
$4=0 (Invert step enable pin)
$5=1 (Invert limit pins)
$6=0 (Invert probe pin)
$10=1 (Status report options)
$11=0.010 (Junction deviation)
$12=0.002 (Arc tolerance)
$13=0 (Report in inches)
$20=0 (Soft limits enable)
$21=1 (Hard limits enable)
$22=1 (Homing cycle enable)
$23=5 (Homing direction invert)
$24=300.000 (Homing locate feed rate)
$25=1000.000 (Homing search seek rate)
$26=250.000 (Homing switch debounce delay)
$27=1.000 (Homing switch pull-off distance)
$28=1000.000 (Spindle frequency)
$30=1000.000 (Maximum spindle speed)
$31=0.000 (Minimum spindle speed)
$100=266.660 (X-axis travel resolution)
$101=266.660 (Y-axis travel resolution)
$102=80.000 (Z-axis travel resolution)
$110=8000.000 (X-axis maximum rate)
$111=8000.000 (Y-axis maximum rate)
$112=6000.000 (Z-axis maximum rate)
$120=500.000 (X-axis acceleration)
$121=500.000 (Y-axis acceleration)
$122=500.000 (Z-axis acceleration)
$130=1500.000 (X-axis maximum travel)
$131=900.000 (Y-axis maximum travel)
$132=50.000 (Z-axis maximum travel)
The problem is solved. I changed from active high to active low, and now everything works. Thanks for the support!
Out of curiosity, which setting did you change?
Sorry for my lack of clarity. It was the wiring I changed. Previously, I had connected +5V on the MKS DLC32 to H on the laser PSU (and TTL to ground). I changed it so that TTL on the MKS DLC32 now goes to L on the PSU. No connection to H anymore.
Clarify if you’re referencing TTL as the ground terminal of the LED connector on the DLC32… that being wired to the L terminal.
Hi!
The issue might be due to the power/speed relationship. At 100 mm/sec, the laser doesn’t have enough time to burn properly at 20% power, especially with a 130W tube. The K40, with its lower power, can handle higher speeds better.
Try adjusting the power slightly (e.g., 22-25%) for higher speeds, and check the acceleration and jerk settings in LightBurn or the DLC32 firmware. These tweaks should help improve the burn at faster speeds.
Hope that helps!
Just installed an MKS DLC32 on a 130W CO2 laser.
On the left, I have 20% power and a speed of 20 mm/sec.
On the right, I have 20% power and a speed of 100 mm/sec.
I don’t understand why the laser doesn’t burn all the lines when running at a higher speed.
When I run the same job on my K40, the result is perfect at the higher speed.
Could it be that the DLC32 isn’t fast enough?
Do you have overscan enabled? It would help to see the cut settings for each to give you feedback.
Can you please explain?
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