Using Jtech Laser with BB 4th Axis "Revolution"

Onefinity Rotary 4th Axis 'The Revolution" BB Buildbotics Rotary
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Apologies for the long post!!! Theres just a lot of stuff to go over with how many hours ive dumped into this.

I have purchased and recieved my Revolution back in July or early August. And i purchased this for my first project is to laser 20 to 30 water bottles with a customized logo and names for a company. Ive spent several weeks, now months attempting to figure out how to program this to work. Ive used Lightburn to create the design and generate the g code to send to the BB controller. When I run the file ive had every issue imaginable. Ive watched tons of videos to help for lightburn settings. Tons of the BB controller settings and made sure the settings are correct. And confirmed with OF support. Theres gotta be something im missing. I feel like im pretty technically minded and have never had any issues with any CAM or CAD programming. But this one has brought me through the ringer. Theres a youtube video of a guy engraving a lamp and attempted to reach out but no response. I reached out to onefinity attempting to figure out what im doing wrong but so far no cigar. I explained my issue with support and asked if it could be the transfer of the gcode not being right and they just replied “possibly?” So i am at a loss. I can attatch pictures of settings and gcode whatever someone needs. Please someone help me with this. Otherwise im just gonna have to send the water bottles back and reimburse them.

It says the videos i made are too long to attatch to this to show the issue but i can send screen shots or the videos another way.

When i run the file. The starting point brings the A axis to -30 inches before starting. And when i run the laser as fill where it goes back and forth that seems ok for the x axis. But the rotary is turning to far where there is like a 1/8th distance per each line. When i use the offset fill option the x axis only moves to that -30in starting point then freezes in the one position and the rotary turns just creating a single line.

In lightburn ive swapped the a and y axis to see if that would work and have also trying swapping the stepper motors in the controller. At one point i got the x axis to work correctly on the offset fill but then the rotary didnt turn.

Im hoping its just an easy oversight on my part but it really has me puzzled. Any insight would help.

Please and Thank you!

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The bb rotary post processor must be in metric. Is your file in metric or imperial? Make sure you only use metric gcode

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Im certain ive tried both. Ill will try again and verify. If i have the controller in imperial and the gcode is sent as metric would that cause an issue as well or just the sent gcode? Is there a different post processor i need to worry about and if so are you able to link it?

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I changed more settings in Lightburn. I did have one of the options set to inches. I have changed it all to metric and seems to be running the file correctly. but now i am facing a different issue. The velocity for the rotary doesnt exceed over 1 m/min even though i have the speed set at 5080mm. Which in turn would burn the project. and in lightburn it shows it should take 2 min to complete the file on the controller it shows it will take 30 min because of this. Also a new issue has begun where now the xyz axis will all home when i boot the controller but when turning on the rotary and im able to jog it. it does not allow me to home the A axis. What would you recommend to hopefully solve these issues?
@OnefinityCNC

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I don’t know laser set up but I have had a similar program where the speed setting had a decimal point in front of it which my tired eyes didn’t pick up during set up.
Maybe check there?

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The an axis cannot be homed on bb as there is no sensor. You have to manually set home. All these things are covered in the manual.

Change white space scanning to a faster speed.

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It looked to be all the setting were correct. Its working now im stoked!

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@OnefinityCNC

I appreciate the help. Its working now! With changing every thing to metric it was running the vector correctly but the velocity being super low. I changed the lightburn software to use “fill” so it does a raster cut instead of doing the “offset fill” where it would outline. That has fixed the velocity problem.

Hopefully i wont have any issues once i get to the carving side of things lol but ill reach out if i do.

Thanks again!

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