The base for the machine is relativley simple. It consists of a sandwich of MDF sheets with an airgap in the middle. This design allows for a vacuum hold down feature by drilling holes into the top sheet and applying a vacuum to the middle void. Underneeth the cutting surface are two feet on each end with linear rails and a drive screw running the length of the table.
|Base with separator blocks attached|
|Stepper motor attached to foot with motor spacer|
|Second view of motor attachment|
|Custom machined motor addaptor|
|Stepper motors with addaptors attached|
|Base complete with linear rails and threaded rod installed |
(and yes that is toilet paper being used as supports)
The base turned out to be the weakest link of the entire project and the reason it was scrapped. The unsupported span was too great resulting in deflection of the table and the linear rails and lead to whipping of the threaded rod. Further discussion of these issues can be found in the lessons learnt.