simplest 3d scanner

Very simple:

You need, a stepper motor.
a 3d printer
those 2 printed parts.
a line laser i used my dewalt construction one!
and a android cellphone or tablet with scan3doid (around 5$)

https://play.google.com/store/apps/details?id=com.gsohler.scan3droid&hl=fr_CA

Then I suggest unplugging x motor from your 3d printer and plug your new scanner's one.

Now you have to determine how many "x mm" makes a complete revolution of the stepper. To do it, I used pronterface and counted t