I have an Ortur Laser Master 2 Pro S2 with an Ortur YRR 2.0 Rotary Roller and latest firmware (v1.91). Lightburn version 1.4.05.
I read many guides to setup, from this forum, youtube videos, etc.
Fist, I do this steps:
Reset Ortur to factory defaults and change Soft Limits ($20) and Home cycle ($22) to False, also disabled “Auto-home on startup” in device settings.
In the Rotary setup I change Rotary Type to “Roller”, and select “Enable Rotary”. My Rotary roller diameter size is 20.00mm so I set “Roller Diameter” to 20.00mm and “mm per rotation” to 62.83.
Then I try to engrave a Thermal Printer paper roll (for test), but I can’t get a good engraving. The laser don’t pass two times for the same place.
Are you sure your roller diameter is accurately entered?
Have you tried reducing the speed, and power, to see if that improves it?
If you are getting perfect circles when burning flat, it is not backlash or loose belt sprocket.
Look at the 6, 8, and especially the 3 in your image. that is a pretty good indicator of slippage. You might try try reducing the parameters $120 and $121 acceleration rates to reduce the initial start-up jerk of the rotary.
Or use the rubber band trick.
I will be traveling tomorrow, so maybe someone can comment about the results you get.
Yes, as you can see in the first test, I try intentionally wrong values and the result is the same.
Now tried with 1000 mm/s and 10% power. Same result.
Without Rotary, the machin works fine. The rotary and belt is brand new, in perfect condition and well tightened.
Ok, reduced to the half. Same result.
Done. Same result.
I tried with a circle, same result. It’s like it’s moving further in one direction. Something like 10 steps forward, 9 steps backward (random numbers for the example).
If a rubber band (assuming you had it holding the cup against the rollers, and not just around the cup) and reduced acceleration did not fix it, I say it has to be an error in the rotary motor positioning commands from the controller. In other words, there is a settings error.
Try this… Put a mark on the driven rotary roller. With the rotary attached, enter G00 Y251.327 in the Console window (if you get an out of bounds error, reverse the sign). That should command the rotary to rotate 4 rotations, and the mark should be in the same start position. Now enter G00 Y-251.327 (note the polarity change) and it should return to the exact same position it started from.
If it does not, your rotary calibration needs a correction.
If it does return to the same position, I am asking for @misken and/or @bernd.dk to step in because I am traveling today. If they join the conversation, expect them to ask you to redo what you have already done. That is part of the diagnostic process.
Basically, the steps or mm per rotation settings do not contribute anything to the issue. Those settings only change the actual size of the design, but it should be repetitive, just with a wrong distance.
As Mike already pointed out, usually slippage is the issue with rollers. Try to add weight to the object, e.g. fill it with water.
Next, you should never use line mode with a rotary. Only scan along the x axis, do not follow lines. The y-axis should only do minimal steps, no further movement. So check setting your layers to fill, scan angle 0 degrees. Additionally, never do multiple passes with a rotary. Adjust settings that you just need a single pass.
Hi Mikey, thank you for your trust , but I keep a little distance when it comes to rotary accessories or something I don’t know enough about. After the last pictures with tests of squares and circles and the numbers on a line from Rodrigo, I think it is a rotary problem, but it is more a “private” guess than real knowledge.
Welcome! And thanks for responding. I hate calling on you guys, but I am reluctant to leave the OP with nothing to go forward with. I learn very fast, but I am still a newbie at the laser game.
, but I keep a little distance when it comes to rotary accessories or something I don’t know enough about. After the last pictures with tests of squares and circles and the numbers on a line from Rodrigo, I think it is a rotary problem, but it is more a “private” guess than real knowledge.