# Galvo fiber frames but will not engrave – “Unrecognized board signature: 0000238409002002” **URL:** \ **Category:** LightBurn Hardware Compatibility\ **Tags:** driver, galvo, windows\ **Created:** [May 17, 2026, 10:15pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799 "2026-05-17T22:15:23Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![philipschiff](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/p/51bf81/32.png) [@philipschiff](https://forum.lightburnsoftware.com/u/philipschiff)\ **Post date:** [May 17, 2026, 10:15pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/1 "2026-05-17T22:15:23Z")
Hi, I’m trying to use LightBurn with a 60 W ComMarker MOPA fiber (galvo). The laser will frame correctly with the red pointer and the head movement looks normal, but when I click **Start** the job immediately goes to 100% and finishes with **no engraving at all** on the material. I think I’ve tracked this down to the board not being recognized by LightBurn. **What I see in LightBurn** - Device type: **JCZFiber** (galvo) - Connection status: **Ready** - Device was created by importing my EZCAD2 **markcfg7** file, with the correct field size for my lens. - Fiber type in Device Settings has been tested as **IPG\_YLPM** (and others) with no change. - Simple test jobs (e.g., 10×10 mm filled square at 90–100% power, 500–1000 mm/s, 30–60 kHz, Output ON) frame correctly but still produce no mark. - At the bottom of the LightBurn window I get this message: > **Unrecognized board signature: 0000238409002002** From what I understand, that means LightBurn is talking to the card but does not recognize this particular JCZ board signature, so it won’t actually drive the laser source. **What Windows shows** - Controller appears in Device Manager as **USBLMCV4**. - Driver name: **LightBurn/BJJCZ EZCad2 Controller** (installed via the LightBurn installer’s EzCad2 driver option). - No warning icons; Windows thinks the best driver is already installed. **What I’ve already tried** - Re‑creating the JCZFiber device from my ComMarker EZCAD2 **markcfg7** file (fresh device, correct work area). - Testing multiple Fiber Type options (including IPG\_YLPM) in Device Settings. - Verifying layer Output, power/speed/frequency, and using a brand‑new simple file for testing. - Reinstalling the LightBurn EzCad2 driver and rebooting Windows. - EZCAD2 still gives “failed to open LMC driver” on this machine, but my main priority is to get LightBurn working. At this point it looks like I’m running into the unknown‑board‑signature limitation more than a configuration issue on my side. **Request** Could you please: 1. Confirm that board signature **0000238409002002** is currently unsupported, and 2. Either add support for this board in an upcoming or test build, or let me know if there is a configuration/device‑file workaround that will allow LightBurn to actually fire the lasetion/device‑file workaround that will allow LightBurn to actually fire the laser on this controller? I’ve attached: - My exported **.lbdev** device file for this JCZFiber setup. - A screencreenshots of my Device Settings and the simple test layer, if that helps. Thanks in advance for any help—happy to test a beta build or provide more information if needed. Attached the **.lbdev** device file for this JCZFiber setup. [k0ZDZkMzc5.lbdev](https://forum.lightburnsoftware.com/uploads/short-url/mvZSFtQJIgM6bTNA9cDd5mZzw0c.lbdev) (50.1 KB) ---
**Author:** ![MikeyH](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/43a26b/32.png) [@MikeyH](https://forum.lightburnsoftware.com/u/MikeyH)\ **Post date:** [May 17, 2026, 10:54pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/2 "2026-05-17T22:54:15Z")
I seem to remember reading all this in a previous posting. Is this a duplicate posting? ---
**Author:** ![philipschiff](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/p/51bf81/32.png) [@philipschiff](https://forum.lightburnsoftware.com/u/philipschiff)\ **Post date:** [May 17, 2026, 11:25pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/3 "2026-05-17T23:25:57Z")
Yes looks like someone else had the same problem. Unfortunately I don’t know if the solution will work for me. ---
**Author:** ![MikeyH](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/43a26b/32.png) [@MikeyH](https://forum.lightburnsoftware.com/u/MikeyH)\ **Post date:** [May 18, 2026, 12:28am UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/4 "2026-05-18T00:28:05Z")
Well at least you have someplace to start. Good luck! ---
**Author:** ![jkwilborn](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/jkwilborn/32/63089_2.png) [@jkwilborn](https://forum.lightburnsoftware.com/u/jkwilborn)\ **Post date:** [May 18, 2026, 1:41pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/5 "2026-05-18T13:41:36Z")
Don’t know about your device, but Lightburn uses a different driver in Windows than EZCad. [![](https://img.youtube.com/vi/lGO9IsJbN14/maxresdefault.jpg "EASY! Swap Between LightBurn and Ezcad FAST") ](https://www.youtube.com/watch?v=lGO9IsJbN14) * * * > [@philipschiff](#): > > including IPG\_YLPM You mention a JPT source, IPG types are a different manufacturer, not JPT, from what I know about this stuff. Source type in your description clashes with what you’re telling us about the source. 😺 ---
**Author:** ![system](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/system/32/64335_2.png) [@system](https://forum.lightburnsoftware.com/u/system)\ **Post date:** [June 17, 2026, 1:42pm UTC](https://forum.lightburnsoftware.com/t/galvo-fiber-frames-but-will-not-engrave-unrecognized-board-signature-0000238409002002/189799/6 "2026-06-17T13:42:34Z")
Closed on June 17, 2026, 1:42pm UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.