Thread: Steel tube build
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11-04-2020 #1
I am planning on making my first cnc router, without much experience. I want to cut wood, and hopefully the occasional sheet of aluminum and some copper.
My draft use 200x200x10mm steel tubes for the X- and Y-axis. Two 20mm linear rails and a ball screw on each section. 20mm steel blocks on top of the rail carriages. Z-axis use 10mm steel plates. I’ll look into adding a house for the Z, and maybe removing the spacers there as well.
The bed rests are 120x80x6mm steel tubes, bolted on to the square tubes as I don’t know how to weld. Total machine size is 1900x1400mm, with the gantry and Z-axis taking up about 400mm. Weight about 500kg without table. I guess I could make it shorter and try to tile my projects. Ignore the long rails on the z-axis, I’m still new to cad.
Currently looking to use levelling epoxy for the rail surfaces, but the surfaces are rather large. Any experience with epoxy for this large an area?
The gantry and Z-axis with spindle will be about 130kg. I haven’t done the math, but could two closed loop/hybrid servo nema34 steppers move it? Not looking to go very fast.
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