CNC water bath

thingiverse

This is a water bath for CNC milling glass (I use it on a Shapeoko 3). Interior size is 7" x 10", giving you about 5.5" x 8.5" of work space when accounting for collet clearance. It's designed to take a spoil board with 2" x 2" spacing, and attach to a CNC with 4" X spacing, 10" Y spacing. I used screw-in threaded inserts from Carbide 3d for 1/4"-20 bolts. When I printed it with PETG it had a tiny leak at the joint where the tabs connected to the walls so I coated the interior in epoxy to seal it. I installed screw-in threaded inserts while the epoxy was still wet, being very careful to not get epoxy on the interior threads. I CNC-ed a spoil board from an old plastic cutting board with countersunk holes for 1/4-20" bolts. Glass was held to the spoil board using masking tape and super glue. Water depth of 1/4" over the glass works well for me. The fan in my router pushes the water away if it is too shallow.