Hi

Ok first my mistake and should have made clear, Only use 1610 on X & Y axis use 1605 on Z axis.

Yes I would have cover over Z axis has it protects everything.
I would only go to the trouble of oil system if access is difficult and really wouldn't go to all the trouble of Oil pipes when access is easy like yours would be.

Motor position doesn't matter really other than ease of fitting and working on pulleys etc, I tend to always position them with motor down and thread the motor holes has it makes for easy adjustment and fitting. Either works fine thou and I've done both ways.

Single or double Nut will depend on your requirements but for most router type work then single is plenty good enough and even for moderate accuracy milling work they are ok. If your wanting very fine tolerences, say for PCB or Engraving work then yes 2 nuts are best but then I'd say you've built the wrong machine anyway.!!

Quote Originally Posted by idefix View Post
Regarding the long X axis driven by two separate ballscrews and separate timing belts + motors, I plan to link the steppers on 2 different axis via mach3 sofware. Does its sound ok ?
This I'm not 100% sure what your meaning.? . . . . If your asking is it ok to use 2 motors for one axis and slave in Mach3 then yes that's fine and is done all the time. You just have to be aware of it's limitations and tune the motors correctly other wise you can stall one motor while the other keeps going which can be very messy and destructive.!!