4th Corner Problem

LightBurn Hardware Compatibility Ruida controllers
21

Russ is a great guy, he’s always answered my questions and knows very well how these work.

Glad it’s resolved, even if it’s not what you want, sorry about that. One of the issues with large machines is you have to be able to align them more accurately.

Any clue about a next step?

:smiley_cat:

22

My next big hurdle with be figuring out a way to efficiently level a heavy piece of granite to the head of my laser. I would like to build some kind of 3 point table for the granite to sit on, but still need to put some thought into it.

23

No shame in that, I did wonder if the X gantry could have a slightly different tilt at the M2 mirror end to put the M2 mirror off slightly but keep the co-planar state the same at the level, or an uneven mirror, but it seemed a long shot… maybe your issue is just a freakish combination of hard-to-imagine scenarios?

24

Understatement of the year :rofl:

The machine has had quite a few issues I’ve had to overcome or have to deal with.

  1. bowing gantry due to weak material and large span.
  2. squiggles in curved lines due to bad frame design (resonance)
  3. squiggles caused by the extra weight from having a 2nd tool head for my 2nd laser on the machine
  4. Chinese shipment company left the crate in the rain so the guide rails were rusted upon arrival). This also killed the ruida controller and I had to buy a new one.
  5. All the air hoses had slashes/gashes from the factory and were leaking. I had to replace all of it
  6. The laser tube I have is a B grade reci tube (apparently this is common practice for chinese manufacturers to drive down their cost)

You get what you pay for true in this scenario.

Sad thing is I’m probably forgetting a few problems lol.

25

Oh man :weary_face:

That’s a good sign! forget them and move on! :sweat_smile:

I worked in stone benchtops (templating at site and office CAD work mostly) for a few years and granite is a pain to deal with, depends on size I suppose - in the factory they mostly used overhead gantry and swing arms with winches and suction grippers, but for smaller pieces you could consider making a trolley the stone sits on that you can wheel right under and rotate etc, is the floor pretty level? What was your thinking with the 3 points? - was that for getting the stone level?

26

I am just coming into this, but I did not see anywhere whee you discuss verifying the motion system is actually planer. It really sounds like the left and right rails are not parallel.

If the front of the right rail is 5mm higher than the left rail, it will raise the head 5mm, causing your burn to be 5mm lower on the head.

You can see this if you take some burns in between end points, there will become a linear line of dots.

If you have already checked and determined this is not the case feel free to ignore me :slight_smile: