The unit responds properly when the “Home” button is clicked, moving the laser head to the left, then down to the bottom, but once it completes the homing sequence and I click the “Get Position” button, the X and Y positions show “-299”, not “0” like I’m expecting. Also, I have to execute the $21=1…

Your firmware must assume that upper right is origin although you have it homing to lower left. Try this: $10=0 ; this changes your controller to report work coordinates instead of machine coordinates G10 L2 P1 X-299 Y-299 ; sets a work offset to get you 0,0 for lower left Is your actual working …

There is an “ease-off”, so that explains the -299 as opposed to -300. After executing “G10 L2 P1 X-299 Y-299”, it now reports “X=0 Y=0” after homing. I experienced another issue yesterday that I need to trace further. I ran a simple project with two layers. The first was an engrave, the second a…

Since your coordinates were not correctly zeroed out yesterday I’m assuming you were working with Start from in the Laser window set to “current position”. If so, LightBurn won’t necessarily know where the laser is positioned on the machine and will be happy to send instructions that potentially cra…

Regardless of the positioning method, why would the head move far away from the object between layers? The laser work area is 300mm x 300mm, and it started down in the lower left quadrant. The object (both layers) is only 30mm x 40mm, so if it started in the lower left corner for the first layer…

Likely something in the design. Upload here and I can take a look.

See my commentary on AtomStack here, this sounds similar: [image] AtomStack A5, Air Assist control, improper Homecycle LightBurn Hardware Compatibility AtomStack sent us one of their units, I just received it a few days ago and so far we have just assembled it, but not ye…

I believe that the issue was related to the setup prior to having the limit switches installed. LightBurn was set to “Current Position” instead of “Absolute Coords”. Now that I have everything setup, it worked properly. Also, when I executed “G28”, the head moved to the back-right corner and grou…

When I click the “Home” icon in LightBurn. what command(s) are being sent to the printer? I ask because when I click the icon, it performs the expected homing sequence using the limit switches.

[image] Trek2120: when I executed “G28”, the head moved to the back-right corner and ground the steppers I’m not familiar with G28 but I suspect it’s going to machine 0,0 which we know is back right. [image] Trek2120: When I click the “Home” icon in LightBurn. what command(s) are being s…

I believe that I need to move the limit switches to the back right instead of the front left. I initially went with front left because of a video I watched and that’s how it was done, plus, my 3D printers both home to the lower left and that’s what I’m used go.

Totem S with Limit Switches / Homing

LightBurn Software Questions

raykholo (Ray Kholodovsky) January 3, 2022, 6:43pm 10

See my commentary on AtomStack here, this sounds similar: