Elegoo Phecda Laser Crosshair Holder

This universal laser crosshair holder can be mounted on the laser unit of the Elegoo Phecda (or other laser engravers) to provide a laser crosshair on the workbench. It mounts a crosshair laser (~5$ on Amazon) with a coin cell holder (~1$ on Amazon) and can be attached with a poster strip to the laser unit. 

The crosshair laser is press fit and is tight, but can be secured with an M3 screw and nut. The coin cell holder can be fixed down with a drop of superglue.

To use this, you need to measure the distance of your laser engraver laser point to the crosshair center. Do this by marking the crosshair center on a piece of paper and then engrave a square. Measure the distance in X and Y from the origin of your engraved square to the marked crosshair center. Use those values in Lightburn to set the offset. If you need detailed instructions, you may want to search on YouTube for a tutorial on how to configure crosshair offsets.