After lurking for a long time and coming out of the winter slumber, I decided to bite the bullet and do the JGRO build.
A couple of variations:
- Most of the framework is made from 20mm thick HDPE (the stuff chopping boards are made from).
- The bearings are a mix of 20mm and 12mm linear pillow block bearings on ground shafts
The HDPE is brilliant to work with. It doesn't split, you can cut, drill and tap it like aluminium or steel and is is impervious to moisture and hence swelling or moving like MDF.
So far I have built the base framework (though that is in MDF and needs to be painted) ready to take the gantry and today finished the Z axis and router mount.
I am driving it all with Mach 3 using the custom ROUTER screen.
Photos to follow in the thread and all comments welcome.