Twin Head Problem 2



It’s been two years since I opened the forum thread above. I’m still waiting. Is there any chance of solving the related issue?


1 Like

When presented with this information I’d want to test if there is a setting for HeadNum 0 and if it runs the first laser.

I will endeavor to find out the current status of this.

In the process of solving this problem; I can do the tests you request on my cutting machine and provide information support about the results.

Excellent. I accept your offer. :slight_smile:

I was informed by my colleagues that the dual laser head control is working as expected. In order to offer a possible counter-example I’d like to understand the entirety of the problematic workflow you’re experiencing.

I see the Thunder Laser screen and I see the Head Num and From what I can gather, I’m assuming that something is written to the controller that changes how LightBurn uses both lasers.

I downloaded the ThunderLaser and Rdworks files. I’m still digging in.

2023-05-24_12-16-19 HeadNum is zero forum 100715

Is HeadNum=0 in your set up currently?
I believe the laser enable is elsewhere.

Do you have a LightBurn file that you’re working with (for your workflow) with both laser heads enabled?

Please Close the ThunderLaser software, Load up the file in LightBurn and connect to your engraver. Set everything up as you would, if you were about to send the task to the engraver.

Click File, click Save As, and call this Project 1.

Click File, click Export Prefs, please name the file Step One and save the file somewhere convenient.

Click Edit, click Machine Settings, click Read, wait for it to finish, then in this window click Save to File - Save this file as Current Machine settings. Then close this window.

Click File, click Save As, and call this Project 2.

I’m after a second copy of the Prefs file here as well.

Click File, click Export Prefs, please name the file Step Two and again save the file somewhere convenient.

Click File, click Save RD file and name this file Step Three.

Sometimes a Ruida controller can get into an unknown state. My first goal is to look for settings that may have changed by doing this.
I’m not expecting anything but I want to lock down this baseline.

Please email these 6 files to
Subject: Attn John Re: Forum 100715 Dual laser Ruida.


1 Like

Thank you very much for accepting my offer.

Yes, in the setup, there is a HeadNum= parameter. This parameter’s logical value changes to “0” when I select “1” in the “Multi-head-auto-layout” tab of the soft.ini file. When I select “2,” it changes to “1.”

If the logical value in the soft.ini file is “0,” the second laser works in LightBurn. When it is “1,” the laser number two does not fire.

However, when the logical value is “0,” the Z motor origin switch does not work, and the machine does not function correctly.


I will send you the files you requested, and I have also recorded a video. I will organize the files and send them to your email address.

Thank you.

1 Like

I have forwarded the relevant files to your e-mail address.