Framing dosnt work on bsl dbk22b(control board is new 2026), working fine with dbk21b(for fiber laser). Update: i use gzt laser, they use inverse gate, but in seacad 5.2.7 working fine
Update again. For gzt laser gate in framing must be 0, but in lifhtburn gate in framing 1 in marking 1 to. Near pin is redpt 1 in framing to
Are you referring to the IO Ports section here?
If you import the SeaCad config file when you added the laser to LightBurn, it should already set the ports correctly.
These pins are only used to start the framing with the pedal input of your controller. Framing should still work when you click the “Frame” button in the Laser window. Can you confirm this?
Yes, all ports disactivated. Problem only in dbk22b with Uv laser from GZTech. I asked BSL last night. They said the problem on lightburn side(maybe). When i click Frame, gate state is 1, but for GZT gate must be 0, set 1 only for marking. For example dbk22b have 2 pins for framing. Gate pin(must be 0) and Redpt pin(must be 1). Please check this information. I know that JPT has inversive gate. Now i only can use hardware for set in a frame gate is 0, for the difference use 1 in a Redpt. Thank you!
@DaniilGorid I’ve moved your posts to this separate thread for easier reference.
Can you send us a screenshot of the “Ports and Laser Settings” and the config file you imported?
It cannot be ruled out that SeaCad uses different ports than LightBurn, but I’d like to confirm it.
If you can add screenshots of the device settings in SeaCad, that would be helpful.
Which exact laser are you using?
As mentioned: The “Start Framing” pin is only used to start the framing with the external switch.
Clicking the “Frame” button in the Laser window should still start the framing. Can you hear the galvo mirrors move when trying to frame something?
You might just be missing the Red Dot. Not every UV source has this. Some can only frame with the UV laser, which is invisible to the eyes.
Try enabling this setting “Red Dot Always On”
The port for “Red Dot” is set to None, so LightBurn can’t turn it on.
We still don’t know which laser you are using or whether it even has a separate Red pointer laser.
Could you take another look at my previous messages and answer the questions? That will help us help you.
Hello! Please check this.
We use the following pins on the controller: pin 22 for PWM, pin 24 for laser activation (should be 0 when the frame is displayed), and pin 23, which is used in the controller as an alternative pin for the red pointer (we don’t have one). In Lightburn, when the frame is displayed, pin 24 is active (1) and pin 23 is also active (1), so the frame is not displayed. In BSL Seacad, pin 24 on the frame is inactive (0) and pin 23 is also active (0), but pin 23 can be set to (1) in the BSL settings. I can send video to you.
I think some trouble in SDK
P.S. Cor files dosnt work too!
We still don’t know which exact laser you are using. This information is important for us to be able to help you.
Again, please review my previous messages and try to answer every question.
Also, please provide the information we asked for.
We need a little more context here. What did you try, and what exactly doesn’t work?
Feel free to send us the .cor file for investigation.
Okey i share to you link of zip(configs of bsl and laser datasheet, screen of ports in bsl)
Cor file with test coordinates too, work stable is bsl.
LimeWire… That brings back old memories! 
Not sure, what went wrong, but I can’t download the config.zip on this link.
Hello! Yes galvo moving correctly. Problem only with LaserOn pin(high level when framing)
I tried to check “red dot always on” and still nothing happened. About corfiles. Yes, cor work only in BSLcad. In lightburn cor files correctly work only with jcz board and ofcource jcz cor files. Thank you
I’m still not sure what the actual problem is.
Can you confirm that framing correctly works in BSLcad? Does it frame with the UV laser, or do you have a dedicated Red Dot laser on your galvo head?
Please show us a screenshot of the “Port” tab in the SeaCad settings as requested.
Some of the settings don’t seem to be transferred to LightBurn correctly.
If I’m not mistaken, the “cortest.cor” file in the config.zip you uploaded contains the “raw measurements” rather than the hardware lookup table that’s being used by the machine. LightBurn would need to convert these measurements first, which it can’t presently do.
The file can be loaded in the Device Settings, but a warning should probably be displayed if an incompatible .COR file is loaded!
I’ll look into this and get back to you.
BSL decided to make their tool use the .COR extension as well, which makes things much more confusing (and it’s not something we control).
BSL’s COR files should work no matter what, because they produce the files, and we simply pass the files to their SDK for use. If the COR files you produced with SeaCAD or their tools don’t work in LightBurn, I can double check to make sure we’re passing the filename along correctly, but beyond that we don’t do anything with those files.
Also, worth asking - Have you run a job with the COR file set, or are you only looking at the red-light when framing? We had an issue in the past where BSL framing moves weren’t being corrected, but the running job was corrected.
For the red-light pointer issue, BSL has a function that we call to set the laser type, and when calling that function we also tell it if we want it to enable the red light. They have a separate function to “enable laser control” which to me sounds like “should the laser be controllable” not “should the laser be on”. Their docs and samples aren’t always clear - I’ll make a change and get you something to try.
I will try cor files with 3x3 5x5 etc.
As a test, I take one of the corners and shift it significantly to understand its performance. For example, I take point 1 with a coordinate of -50 50 and set it to -25 25, so I can see the distortion of the first point.
I also noticed some pin inoperability and signal inversions. For example pin 18 in lightburn pulled down to gnd in alltime. This pin needed only for engineers who produce marking machine, but i just report to you about this.
