Hello everyone. Newbie here.
I am starting a build log of a moving gantry milling machine.
I am not completely new to CNC as I have built one in the past. I have learnt so much from the CNC veterans on this site, and I hope to combine my learning here with my mistakes from an earlier build to come up with something better.
Your inputs are highly appreciated.
Here are some stats:
Machine type: I am aiming for a 36"X24" moving gantry mahine built from hollow rectangular steel tubes
Usage: Mostly used for milling aluminum and a few plastics. Occasional steel drilling.
Accuracy: I am choosing repeatability over accuracy. I am happy with a very rigid and repeatable machine at 0.01" accuracy.
42" hiwin linear guide rails on the Y axiz
32" THK linear guide rails on the X
some other (unknown) 12.5" linear guide rail for Z
Acme screw or ballscrew for X and Y, ballscrew for Z
2 nema 34 640 oz-in motors for Y, and 1 for X
1 Nema 23 motor for Z
4 microstepping driver (M542H). I believe its chinese.
48V 7.5A for X and Y, 24V 30A for Z and my spindle.
I have been working on a CAD model for a month now. I will post design pictures shortly.
Your critique/inputs are highly appreciated.