Hello from Switzerland

[Jonathan]

Hello Jonathan, I still have to learn about feedrates, I would be mainly working with wood and some aluminium, what would the advantage be of having 10mm pitch on the Y axis, I'd rather go for "resolution" than speed, I will be getting a System 4C with 3.1Nm motors setup from Roy at DIYCNC

If you would rather have resolution then the best option is to use the 10mm pitch screw and use pulleys with 2:1 ratio to got the resolution. That way the screw will not whip as the critical speed will limit the feedrate to twice what you would get with 5mm pitch. However with the stepper drivers you have chosen the motors will not run very fast as it is only a 30V driver, so it probably wont make a difference. If you got 75V drivers it definitely would.

I definitely will be using rotating ballnuts on all axis with angular contact bearings on both ends, I've seen many on this forum recomend "Linear Motion Bearings" on eBay, I also thought I'd get a 2.2Kw Spindle from them

I think you may have misunderstood me... this is what I was referring to:

http://www.mycncuk.com/forums/showth...t-design-ideas

Again not worth it unless you use a higher voltage stepper driver.

Did you take a look at the P2 model from the link I gave, he uses 15mm thick AlMg4,5Mn Aluminium and the gantry sides are 440mm High!!
I'd like to have some height as I'm contemplating adding a 4th rotary table later, do you have a link to your router?

I have ... it's still not very stable in my opinion. This is mine, skip to the end of the thread if you want to see what I mean by having no gantry sides as I started off not so good:

http://www.mycncuk.com/forums/showth...outer-building...