Alignment issues?

I’m running an Acro machine with a diode laser. I recently bought the 8MP camera and I’ve been trying to set it up. During one round of calibration and alignment I ended up slamming my gantry into the back of the CNC machine. Before the the “incident” my calibration engravings were bang on. Now they are off. I’m assuming I’ve jarred something loose. Any ideas of what it could be before I dive in to checking everything?

Alignment marks now (before all four were good).

It was a loose pulley set screw. The engravings are back to normal.

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