Second CNC table build, here we go again....

[Davek0974]

Got the gantry supports welded up - very little distortion which was great, impressed myself with that one

One thing I can now say is, that gantry beam is damn rigid, i put a dial indicator between the gantry and side beam and it's practically a solid object










Also got the X axis and THC mount welded up, came out nicely.

One question - I had to move the x motor rearwards, placing the rack on the back face of the beam - no biggy but, I had forgotten the rack bolts go across the rack face so are now screwing into nothing. Should i fit some short support angles like 10x20x4mm 100mm long and welded to the beam, and then mount the rack to them????

Or something better???

[njhussey]

One question - I had to move the x motor rearwards, placing the rack on the back face of the beam - no biggy but, I had forgotten the rack bolts go across the rack face so are now screwing into nothing. Should i fit some short support angles like 10x20x4mm 100mm long and welded to the beam, and then mount the rack to them????

Or something better???

Looking good Dave, I presume that you mean Z axis motor not X? I'm not sure how much force the stepper will exert on the rack but I would think a long piece of angle tacked on to the back beam would be ok to mount the rack, just have to be careful that you don't distort the beam welding it but you seem to have done a good job of not distorting things so far

[Davek0974]

No definitely X-axis, the Z-axis is mounted on the THC unit, X-axis on the carriage.

I have opted to try the 3M VHB double sided tape for this - no distortion and easy to fit, seems to be getting good remarks on other builds.