I cannot get Lightburn (or the machine) to home in the top left position - it always wants to home top right.
I have changed the machine settings in Lightburn to say top left - but nope it goes to the top right and then hits the buffer until it times out. It was working before I moved to a new house - other than that it seems to be working - only I think my PC (an old one I have assigned to the engraver because it is now in a shed) may have low memory because it starts then stops after only a short line.
Where your laser homes itself is defined by the firmware and hardware on your laser, set by your manufacturer. To change the corner it homes to, you would need to physically change where your limit switches are mounted on your laser and update the firmware accordingly. It’s not enough just to change your settings in LightBurn.
Sorry for the delay - I was in the shed. No - no errors (only after it fails to reach endstop. Can I download and install the firmware again (something may have messed it up)?
Sorry just to be clear - if I just switch on the engraver it doesn’t home and fail itself - only when I select home in Lightburn. I may have switched off self homing when I was trying to troubleshoot the problem.
Thanks for the extra context. Open your Device Settings in LightBurn and make sure that the corner your machine homes itself to matches the corner in your origin. Here’s mine as an example:
Thanks for confirming that your origin is set correctly. If you enable your Move window and you use the arrows to jog around, does your laser move in the correct directions?
It’s possible that you need to adjust your $3 value:
Instead of downloading and installing LightBurn again, you can click on Devices in your Laser Window and use the ‘Find my Laser Button’ to create a new device profile for your laser. That will allow you to experiment with different settings. Do you know what kind of controller is in your K40?
Where the machine homes, determines which quadrant it operates within. The machine has a fixed home location and you have to tell Lightburn which quadrant you’re operating for it to generate the proper code.
All machines home at the center of the coordinate system.
Lightburn doesn’t control this, it the controller firmware setup in your laser that determines this… Lightburn has to know to generate the correct control codes.
Thank you for replying - it’s a Monport, I think it was recommended in Lightburn topics. I just want to remind everyone that it was working perfectly - then something happened, I tried various things from suggestions and now I don’t know where I am - I think it best to reload the firmware into the card - but I don’t know where to get it. I will try jogging the laser head around to see if the communications are correct.
We will keep at it as long as you do! Feel free to come back with screenshots of your device and machine settings if importing and migrating your preferences doesn’t fix your homing issue.
K40s can have a variety of controllers in them. A photo of your controller might help determine the type or you can use the ‘Find my Laser’ button in LightBurn to help identify it.
Thank you for replying. Lightburn picks up the K40 as GBRL. I have selected home as top left in Lightburn and because of hitting the endstops on startup I have disabled ‘home on startup’ because if it does hit the endstops then I cannot communicate with the engraver - it seems to think data is streaming.
I have found something new. My laser engraver is reversed! It starts top right and engraves right to left mirroring the image. For clarity the words are like you are looking from the back, all the letters face left but are the correct way up.
Does anyone know where I can download the configuration file for the Monport controller board - I think it would be quicker now to re-flash the Arduino with a clean install.
