Giant 20' x 3' x 2' router build

**charlieuk** · 12-05-2014

Originally Posted by Jonathan

It's hard to say how good the driver from CNC4You is, as the description doesn't state what algorithm they use - just some 'buzzwords' which appeal to those who don't know so much about the subject. We can therefore only speculate as to which is best - e.g. the lack of software tuning could be a disadvantage, or it could just mean the drives uses algorithms to automatically 'adapt and learn', so manual tuning is not required.

I have not observed a tangible different between the two motors from the measurements I have taken.

You appear to have ballscrew on the Z-axis, so the mechanical advantage to the motor to lift the axis is already huge. You definitely don't need and therefore shouldn't use a bigger motor on the Z-axis as it is important for this machine to have quite high feedrates, which you certainly wont get with a Nema 34 motor, especially with a gearbox.

Many thanks Jonathan for that i will see if i can find out more about the cnc4you drivers if posable but it sounds like all you lot use the others so hopefully all your support will be sufficient to get me out of any problems im bound to have.

the z axis and y axis is a ball screw and will be the nema 23 3nm . The long X axis is what they suggested the nema 34 possibly with a gearbox for as the gantry weight will be some where around the 60kg area sorry i may have confused you.

best regards

**Jonathan** · 12-05-2014

Originally Posted by charlieuk

the z axis and y axis is a ball screw and will be the nema 23 3nm . The long X axis is what they suggested the nema 34 possibly with a gearbox for as the gantry weight will be some where around the 60kg area sorry i may have confused you.

Sorry, that was my fault - for some reason I read 'x axis' as 'z axis'. The gearbox is a reasonable suggestion for X - you need something there (be it a gearbox or belt) to get sufficient resolution and better acceleration.