Engraver

This is a machine for creating printed circuit boards. It works by shooting an UV laser to a photosensitive film applied to the copper clad board.
Parts needed (links just for reference):
2x nema 17 steppers
4x 8mm diameter rods
8x 8mm bushing (https://www.aliexpress.com/item/10pcs-SF-1-0810-Self-Lubricating-Composite-Bearing-Bushing-Sleeve-8-10-10mm/1393921440.html)
1x PC case(or wooden box)
2x M5 threaded rods
8x M5 nuts
2x stepper motor coupler (http://www.ebay.com/itm/5x5mm-CNC-Motor-Jaw-Shaft-Coupler-5mm-To-5mm-Flexible-Coupling-OD-19x25mm-LU-/162331234217?var=&hash=item25cbb20fa9:m:m3W6cN0V5fJUprqoNVIGbfw)
20x M3 screws and nuts
1x 50mW+ UV laser (http://www.ebay.com/itm/New-Metal-Laser-Diode-LD-SLD3232VF-Fit-For-SONY-405nm-50mw-CW-Violet-Blue-1PC-/232136388708?hash=item360c683064:g:sj8AAOSwB09YIEZg)
1x laser housing (http://www.ebay.com/itm/2pcs-12x40mm-Metal-Housing-Case-for-5-6mm-TO-18-Laser-Diode-w-200nm-1100nm-Lens-/252086841192?hash=item3ab18bef68:g:mbwAAOSw4SlV8