I’ve been meaning to work on replacing the red dot pointer with a cross-style pointer for 3 reasons;
- The alignment on the red dot changes if the distance to the target changes
- The mounting bracket isn’t very sturdy or solid and moves/shifts often
- It’s hard to see the dot if the nozzle is really close to the work surface
The pre-made and modeled ones I’ve found are made for the K40 or other device, are flimsy, or don’t work for other reasons.
I’ve combined a tube mount with a 3D printed bracked to address the issues:
- Aluminum clamp doesn’t have 3D-printed imperfpections and is a solid mount to the laser head tube.
- Less material used, and the arms are (or can be modified to be) far enough away from the head to show the line even if the nozzle is close to the surface
- X/Y lines are easier to see and, if aligned correctly, give a visual X/Y alignment for objects on the bed
- Z/object distance doesn’t matter (if aligned correctly).
I’m going to try to do the physical install tomorrow. OpenSCAD model file included for anybody interested in playing with it. I’ve parametized all the settings, so it can be adjusted for different environments.