my sculpfun cannot make a square or a perfect circle. (they are 1-2 mm off and 1-3 degrees off) I thought it was the laser until I found out that the cuts where exactly the same… same angle and measurement-deviations on all cuts. Hence I now think there might be a software fix…Any ideas??
That does not point to software as the problem unless only one software application has the issue, and others do not. For example, if you run the same square from LaserGRBL or another app, does it do the same? If it does, then it’s almost certainly hardware.
Can you show a picture of what a square looks like when burned?
Thx for the quick response.
Engraving introduce the same fault. This is a 200 mm engraving test illustration.
looks like it moves longer in the X-axis than in the Y-axis. But it is very consistent and precise.
Most likely the physical rails of the machine are not perfectly square to each other. I would check that first.
Hi Carsten,
this is nothing the control software should care about. It’s the other way around. You call this calibration of the machine mechanics. You do it quite as you did - you create a form of a size you exactly know. Like the 200x200 square. Then it’s lasered and measured as you did. If you have a deviation, you need to adjust the laser, not the control software. In this case, you adjust the firmware settings. In particular, $100 and $101. Those parameters define how many steps (turns) the motors shall do for a specific distance (1 mm). Since the mechanical setup slightly differs every time, you need to fine adjust for your laser. In LightBurn, you can use an assistant wizard to do this. Open the machine settings window and then select “axis calibration”.
If you corrected the steps / mm value, you laser the test pattern again and check if it fits. If not, repeat again.
One additional note: the laser mechanics are not set up perfectly from factory, you need to do the tuning yourself. A guide is here: Guide to mechanical adjustments and maintenance - Diode Laser Wiki
Thankyou, Melvin - very informative. The calibration issue is understandable, but it surprises me how difficult it is to setup the mechanics to a satisfactory level. The corner assemblies needs to be exactly 90 degrees, but they do not seem to be constructed to assure that. And the X-axis beam also needs to be 90 on the Y-axis, which is also a 10 times back and forth adjustmentproces. But thanks for the info - I will continue the 90 degree-battle.
calibration is done and the frame is squared… perfect and precise cuts now. Thx for your help, all.
This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.