This is a utility part to assist in perfect zeroing your X and Y axis on an AtomStack A5 M40.
You will need to do a couple of modifications to the laser chassis while installing this.
- Move the belt retaining T-nut on the left side up to the 10 graduation printed on the extrusion:

- Fold the belt down if there is excess:

- Remove the axis end stop, this part will replace it, remove the two frame screws, align the part, and screw them back in:

- Verify that the zeroing is correct by pushing the laser module into the notch on the zeroing block:
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https://doslabelectronics.com/
https://github.com/LogoiLab