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18-06-2023 #1
Hi there,
I have already built two cnc machines from scratch using advice from here but I’d like a smaller machine able to machine a workpiece dimensions of 600mm x 300mm x 40mm. The machine is specifically for milling lots of parts for museum display in Corian type solid surface.
Critically due to the duration of some of these machining jobs I want be make a soundproof box to enclose the machine to keep the sound to a minimum. Having a dedicated smaller machine is therefore easier to build an enclosure for that the bigger machines.
I’ve been getting some prices from China to import a 6090 however with the import costs and my previous experience i’m pretty confident I would put together a decent machine well under the door to door prices I’m being quoted.
I would have thought a short gantry in 6mm wall steel box, all 20mm linear rail, twin ballscrew Y axis, closed loop setup would be the way forward. Saying all that I do have a Gecko540 controller, mach 3 pc and all the cabling and Nema 24 motors all ready to go so as a first port of call I really should look at reusing that.
Questions
Q. If using ballscrew on all axis should I be looking to use a gear drive with the motors?
Q. What size and pitch of c7 ballscrew on each axis?
Q. Where can I source a T-slot bed or t-slot sections to make a nice rigid bed surface?
Q. Should I be considering using a water cooled spindle with better lower end torque. One of the four or 6 pole 18,000rpm spindle?
Q. If I fabricate most of the frame from 6mm wall box and 12mm laser cut plate what profile size alu extrusion should I use for the gantry?
Thanks in advance.Last edited by marbles; 18-06-2023 at 05:11 PM.
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