Hello all! I ran out of pocket money for my own MPCNC, but I’ve just been handed a golden ticket by my University Professor to build one as our test rig for “small scale” proof of concept for printing in clay, mud, cement and other paste materials fed via a bowden tube into the nozzle. For reference I’m planning to experiment with huge nozzle diameters between 2.5-10mm at slow printing speeds.
I’ve shown him the MPCNC and have been asked to come up with a bill of materials for a 2’ x 2’ x 2’ build area (hopefully utilizing bundles for sale here on the website). I know that there really isn’t any issue with the X and Y axis, but looking around here on the forums, I’ve realized that the average Z axis is below 1’ due to needs for high rigidity required for CNC use, but if I’m using this only for printing, and only for relatively basic shapes (through a big honking nozzle at that), is this something that would be considered doable just by structural reinforcements and longer conduit?
Alternatively, I do have plans to design a Z axis with ACME rods at all 4 four corners, quite literally lifting and lowering the entire gantry to change layer height, but this would add quite a lot of development time that I hope to avoid. Otherwise, I think option 3 would be me haggling down the build height to 1’
What do y’all think?