This is H-bot style(not coreXY) printer I’m building.
I’m planning to build it with lots of aluminum and machinings. 
Originally shared by DongWon Han (DWONH)
After I failed to build simple printer with ‘printed parts’ for precision issues early this year, I’d decided to build ‘robust’ 3d printer.
My choice is H-bot (not CoreXY, which is more popular now) style. I know original H-bot style 3d printer has well known ‘racking issues’ which caused by twisting force of moving gantry from its inherited belt drive mechanism.
I thought racking problem could be overcome if design for linear movement is robust and stiff enough.
I decided to use linear rails and machined aluminum frames for stiffness of the system. Before I go for real implementation shown in photos, I got pretty promising result from the test by laser cut acrylic frames and linear rails.
I’m not sure finished machine can reach a level of precision I expect, it worth trying for me.
