The gantry weights around 20lbs currently and the steppers are nema 34 unipolor motors running 35v. I spent 60 on an 8 feet of rack and pinion and in its rough tested method in which i have no gear reduction (pinion directly mounted to the stepper) i have gotten 760ipm with reasonable accell/decl rates with the motor only producing aprox 2/3 tq spnning below the preffered rpm rangeįor reference my machine is designed to cut and profile wood as fast as possible with about the same accuracy your looking for. Id look at some form of rack and pinion or cogged belt setup. Its lightweight yet rigid and provides an ultra smooth track for precise motion. It is considered to be a 40mm x 80mm profile and all our standard V-Slot parts and accessories are compatible. This profile gives added strength and functionality. The C shaped profile is based on the V-Slot linear guide system. ![]() ![]() Even at 8feet the most aggressive ball screw that was thick enough to not whip (around 2" od iirc) was goign to cost a few K and i would still be limited to around 100ipm. C-Beam Linear Rail aluminum extrusion profile is the ultimate solution combining both linear motion and a modular, structural framing system. These high precision linear rails are based on the open-source C-Beam Linear Rail by Openbuilds. The side of the bar is going to be affixed to some 8020 with an undecided method of keeping the two sides squareĪs far as ball screws, you wont find any ballscrew 20ft long that you both want to buy and could spin at any reasonable rpm. Get the best deals for cnc linear rail kit at. ![]() Im using 1/4 x 3 steel (probably cold rolled) standing on the 1/4 end as guides which im going blanchard ground, and large aluminum blocks that are C shaped with barrings on all faces as guides. Im building a cnc router with 8 feet of travel in the Y.
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