Motor/ballscrew ?

[ne-oublie]

After sending out a couple of info requests on what to use for my router, i am having a hard time getting my head around motor size. I got a very helpful reply from John at Keling inc. Obviously he is far more knowledgeable than i in these systems, i am just having a hard time seeing how a Nema 23 387 oz motor with a 1/4" shaft, can drive a 25mm dia ball screw? The Y yes, but the X pulling the weight of the gantry etc. I just do not want to have problems from under powered motors, before i even get started. As i said he know these systems, so i am sure he is correct, this is what he recommended to me,

http://www.kelinginc.net/ControlSystem.html
KL-G540-48 4 Axis G540 CNC Stepper Motor Driver Controller $599
Special Sale: $549.95

4 pcs of 387 oz-in motors

KL23H284-35-4B (1/4” Dual shaft with a flat) 387 oz-in

http://www.kelinginc.net/NEMA23Motor.html


Here is the link to the pics of my router i posted a while back.

Another newbie, Another Machine, same old ????

Any other info/advice/criticism, will be greatly appreciated, thanks.

Graham.

[irving2008]

Graham,

Take a look at the tutorial I wrote, it should give you some help... There is an excel spreadsheet (in post #2) but you'll need to convert from imperial to metric and back again...

[ne-oublie]

What a great write up, thanks. I will weigh the gantry this weekend and do some calculations, expect to hear from me

[ger21]

Be aware that the inertia of a 25mm screw may require much more torque to achieve rapid acceleration.