[andyew]

Hi all,

It's been some 4 months doing research from ground up for both electronics and mechanical parts of my coming 1st CNC machine! After some longgggg time reading some hundreds of eye soaring posts from here and there, i've come out with this design (mixture of many expert designs i've seen from pictures)!

I need yours inputs about the whole structure especially the Delrin plastic homemade slide/guide on round tube (stainless steel) for all the axis. The X-axis has "half" of a cube that stays on the tube (or simply pipe) while the other Y and Z have "full" cube with hole that hug on the pipe.

The leadscrew is 12TPI ACME of 3/8" diameter and the stainless steel pipe is 30mm diameter. I'll use, as seen, MDF of 30mm thickness for the whole structure. Delrin, as said above, will be use for slider/guide on pipe, leadscrew homemade nuts (for tight fit) and also the thrust bearing pillow. Delrin is represented in "orange" color..... (except for the spindle which is B&D RTX for me)

One notable structure i've chosen is that, the linear guide has wider base than the leadsrew nut base. THUS, X and Y axises have longer travel distance WHILE keeping the load stable enough. That is why the stepper (of X and Y axis) is mounted "innerly" where the moving base (of X and Y axis) will clear over the stepper when reaching the ends....

OK, please do give me a hand and wish to do it very very soon after getting yours expert point of views! (worrying that my design is only a crap and it wont work at all!!!)

Thanks!
Andy