Aluminium profile CNC

[BriceO]

Hmm don't really understand but is "lead" the same as "pitch"?

Yes, exactly I mean pitch. I would like to cut mainly wood and a few tests with aluminium.

My goal is to have a resolution of 0.01 and an accuracy of 0.1mm. I tried to calculate the speed with a hiwin 2020 ballscrew, KL23H2100-35-4B NEMA23 and found a max speed of 500 IPM. Is it possible?

Here is the specs of the motors (4X):

[routercnc]

Ok thought you meant the linear bearings on the rails

For ballscrews my machine is 5mm pitch all round but if I was starting again then 5mm Z and 10 mm for X and Y. This gives better rapids in wood and should be Ok for aluminium but if you drive the X and Y via belt and pulley you can swap out the ratio on X and Y to give 2:1 to give more torque (and less speed) if needed on the aluminium
Not sure about 20 mm pitch - will give very high rapids but you loose some torque and could stall the steppers? Anyone tried this much pitch? May be ok with enough voltage on the steppers . . .

[BriceO]

Not sure about 20 mm pitch too :) Belt and pulley can offer more possibilities, good idea! Do you know where I could find good ones?

Someone made a graph for me for the same motor with different pitch considering the weight of the gantry, ballscrew type, motors specs,... :


10mm seems to be a good compromise. What do you think about that?