Squaring Material on Tarkin

I’m making a top for a charcuterie stand and plan to use Tarkin to cut out all the holes for the hotel pans. Since the size of the top is ~ 55" x 37", I plan to precut the plywood to its final overall dimensions before cutting out all the holes with Tarkin. Note: using 3/4" 5x5 RBB multiply.

I’ve noticed the laser bed twists a little when lowering or raising the bed (I think only when changing direction). I’m not very experienced with lightburn and the lasers and am wondering if there’s a way to use two origin points (or two predefined points) to tell the laser where the material is so I end up with cutouts that are squared and located where they should be within the piece.

I can make two marks with a pencil at opposite ends of the plywood and then align the laser with those two points so it “knows” where it is, but I’m not sure if that is an option in lightburn?

I will appreciate your thoughts!

Here is a screenshot of my project.

Focus the Z.

Clamp ONE corner. This is your pivot.

Start with the red dot sitting on the edge by the clamp.

Jog to the other side of the material

Physically push the far corner back and forth to get the edge under the red dot. This is using the one clamp on the far side as a pivot point

Clamp the whole thing

That’s great.
I didn’t think of this before, but I just asked copilot and it came up with these options as well.
Not sure about print and cut, but the others make sense to me and are along the same lines as your solution.
Appreciate you, Danny!

From copilot:
Print and Cut Tool: LightBurn’s Print and Cut tool allows you to align your laser with registration marks. You can make two marks on your plywood and use the directional arrows in the Move window to position the laser over these marks. This helps in aligning the laser with your material accurately
2. Aligning with Pencil Marks: You can manually align the laser with your pencil marks. Move the laser head to the first mark and set it as the origin. Then, move to the second mark and adjust the position as needed. This method ensures that your cutouts are squared and correctly located

Personally I would recommend cutting 3/4 ply on the cnc the laser will offer only inconsistent results in this thickness

That makes sense, but haven’t taken CNC yet.