I have a OMTECH 20W fiber laser and I bought an 80MM rotary unit. Can anyone help me set it up in Lightburn. I am using it for round applications that are flat and not for round tumbler applications.
Probably help with starting some communications if you would elaborate more on what you are doing.
Makes little sense to use a rotary for a flat object?
I’m sure you know what you’re doing, but it would help us to understand…
A discussion around marking hex bars may be informative:
The conclusion seemed to be that indexing from face to face required an external controller triggered either manually or by an end-of-job signal.
The part is round with a 4 degree angle 1 inch from the edge. So i kicked the indexer at 4 degrees and that is as far as I got. Ive tried x and y. Settings with no luck.
Pictures would definitely help …
If you set the angle on the rotary correctly, it should work as a rotary… It still needs to be rotated.
How is your artwork setup?
I’ve tried different angles. Am I missing something
Straight line text
If it’s setup as a rotary, it should rotate as it does the characters, just like a mug or cup.
Think of a mug with the same kind of slope… I think it should behave the same…
What kind of output are you getting?
I’m set up as a chuck
Now it’s obvious! 
Much as @jkwilborn says, set it up so the flat is perpendicular to the beam and the beam is centered on the flat.
Then measure the “diameter” across the center of the chuck, between the centers of the flat on either side.
You get the chuck’s step/rev value from the stepper driver. If there’s a gear or belt between the stepper motor and the chuck, multiply by that ratio. Use the Test button in the rotary setup window to check the result: it should rotate exactly one turn.
Tell LightBurn you have a chuck rotary holding an object of the diameter you measured, set the step/rev value you found, and it should Just Work™.
no external controller needed at all. Split mart is to mark a distance before the rotary index’s So you just lay out the distant flat of each wall.
To Clarify.
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Before you put the part in the chuck go to the Laser Tools Rotary setup and adjust the mm per rotation. Then click on test and the chuck should turn exactly one rotation in each direction and end up where it started. Mine is 165 mm but yours may be different. I use a magic marker on the rotary so i can see where it started and where it stops
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Then enter the circumference of the part in MM. Set your Start From to Current Position. Then mount your part and level it.
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Manually (By Hand) move the laser head where you want the design to start and click on Frame. Adjust the laser head as necessary and try frame again until you get the correct position and frame focus the laser and run the job.
This is the same process as doing tumblers except for tumblers you need to flip the design 90 degrees one way or another depending on which way your tumbler is mounted but i don’t think you need to do that here. This would be the same as if you had the tumbler mounted vertically and were engraving the bottom. Which of course you cant do. 
I guess another way to do this would be without the rotary and just use curved text to the diameter of the part. I’ve never done curved text in Lighbburn so i don’t know if it has that feature or not. Make a circle the diameter of your part then add curved text around the inside of the circle. But what your trying should work
I tried al kinds of tricks. Nothing is working.
Ok team
I got the text in position. But its on a slight angle any suggestions
You need to find the spot that makes each one square. It should be engraving like it was a mug.
In short. How do I do that. Its not a mug. Its a round part with a angel at the end. Please help