Hi, i’ve been having y axis shift issues with my sculpfun laser (with X & Y extension and yes i have the latest version of LB): basically when it starts cutting the lines on the y axis (after a few passes) will start to shift “upwards”.
I tried cheking if it was some mechanical issue by engraving some grids to check if it was the belts fault or some other “physical” issue but i had no luck, either the engrave would be ok after the first pass or it would totally mess up after the second one.
I uploaded some images to show you the issue.
*the circled image is the first pass, the next image (where you can see the problem has manifested) is the same grid after the second pass
It s the same thing i thought! I tripled checked the tension and I deduced It’s fine, since circles or other more particular forms came out well ( the big letters you see under the grids were engraved before i calibrated the belts)
I am assuming - and you can check on the preview window - the laser is doing a lot of travle then coming BACK to do the interior bits. This means a little bit of tension mismatch will be exacerbated - I believe that is what you are seeing
A simpler test.
Draw a square center of the bed
Home machine > engrave the square.
move head by hand
Home → engrave again
Do they match?
Hello, sorry again for my late response, i did the test you suggested and the squares don’t match, also i encountered a new problem, it seems like a power issue, basically the laser will automatically turn on whenerver it’s moving (i.e. while homing or using the position tool), and during the cut/engrave won’t use the correct amount of power; i’ve encountered this problem when i returned to the the default position the little screw of the resistance of the y axis on the motherboard (you can see what i’m talking about at this link https://www.youtube.com/watch?v=JIZa6yzob7k&t=327s minute 5:10)
Truly, thanks again for your patience and your help
You need to change the reference voltage by turning the potentiometer by 45°. Do not keep it in the original position.
Check your wiring and maybe even flash the firmware again if the laser is turned on continuously. But this could also be caused by an electrical defect…
I tried rotating the potentiometer both at 45°( in this position the laser head Will turn whenever It moves) and 90° (since It’s the way is suggested in the tutorial, in this position sometimes the laser Will activate whenever It’s moving, but if i turn on/off the Power the problem gets fixed).
I checked the Wires and everything seems in Place.
I Will check how to (and what It Means) flash the firmware and if there are any eletrical defects, thanks!
