First thing Iād do is check my belt tension to see if they are tight enough. Second thing is to see if it has to do with the diode not focusing to a dot. The 20W models are worst than the 15W and 7W because the way the diode is made thereās more of a line which emits the light. ie a 20W single lens setup will form more of an oval than a dot. There are multi element lensās you can get which produce more of a dot. You lose a little more power but make it up in the fact that you can concentrate the laser intensity to a finer point.
Ok thanks Iāll check into that as well!
This is covered in the docs - see here where it says, āif you end up with a flat part at the bottom of the engravingā:
This is happening on the outer edges of the graphics Iām trying to etch into the powder coat. Iām gonna check out the link you posted to see if it helps! Thanks!
This roller setup is only a couple of weeks old and theres no slack in the belt and the cups are not slipping on the rollersā¦ At this point Iām at a loss it was doing just fine right out of the box and then one day it just started acting goofy.
Does it do the same thing no matter where you place the index head?
Is there any way of getting phone support? Still having issues
I see you are getting some feedback here:
The other suggestion would be to reach out to the nice folks at Ortur Support for further hardware support. 
Well now it doesnāt have flat spots on the edges of the logo itās making it more like an egg shape than a circleā¦ also itās not consistent when doing it Iāve burned through dozens of good tumblers and a lot of money before realizing using masking tape to test it out first, (rookie mistake on my behalf) it seems like every other time the same logo is sent to the laser itās either egg shaped or ends up more wide than tall. I did the test of finding out how many mm per step it takes to get 1 full revolution using a line drawn out on the workspace (which was 66mm I believe and also way off of the numbers that everyone else seems to report) but it didnāt yield good results at all so I went back to the settings that yielded at least no flat spotsā¦ which is around 79-80mm I believe. Any help is much appreciated! Thanks!
Why does my setup say mm per rotation instead of steps? Is there something I need to change? Could this be part of the problems Iām having? Thanks !
In a chat I just had with Oz, he offered the following:
The Ruida DSP controller actually āunderstandsā the rotary and allows you to set the motor pulses per rotation.
With a GCode controller (ortur uses a grbl controller) youāre just using āan axisā and the steps settings are in the firmware itself. If you were using the Y axis to run the rotary, itās got a āsteps per mmā setting that you donāt want to overwrite, and the commands to move the axis are all in mm from LightBurn. Itās just how the hardware works.
The best approach is to use the A axis on GCode hardware (4th axis) and set that axis to move a full rotation when told to move ā360 mmā, so a mm becomes one degree.
So I should set it up as A axis? Is this an equation Iāll have to figure out every time I put a different diameter object in the rotary?
If you change the diameter of the object you want to lase, you need to inform LightBurn, but that does not mean you need to change or update the settings for āmm per rotationā or āRoller Diameterā, in LightBurn or your firmware. Once set correctly, those settings remain until you change the rotary device itself.
Awesome thanks for all the help!
If youāre using a roller rotary, you shouldnāt need to change anything once you have the roller & "per rotationā settings right. The only time adjustment might be necessary after that is if youāre trying to compensate for something thatās tapered instead of cylindrical. Anything with a taper is going to be harder to get right.
Awesome thanks! I think Iāve almost got it!
Does the object diameter matter after I find the correct number of steps per rotation?
With a roller rotary it doesnāt. The object diameter value is shown there because LightBurn will compute the circumference for you, so you know how ātallā to make the Y axis of your job if you want to go all the way around the object.
Ok thanks!!
This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.