New build.Stell frame cnc 1500X1000.Ball screw and gearing calculations

[JAZZCNC]

Jazzcnc thanks for everything
Sorry for insisting to ask but i am trying not to make mistakes ( at least to make as little as possible).

No problem and you are doing the correct thing asking questions. Just be careful not to get too hung up on specs and calculations they are helpful guides only not hard fast rules.!

Question #1 X & Y use 10mm pitch but for the Z axis you may want to use 5mm pitch for higher resolution/torque.

#2 If you where using steppers then I'd say yes possibly, but because you have Servos geared which give torque across the full rpm range and also geared 2:1 so doubling torque then No you will be better with 20mm to help reduce chance of screw Whip.

#3 The BK/BF are one type of correct end bearings but depending on your design you may prefer the FK/FF type both work the same just suit different mounting locations.

#4 Well you can buy belt tension meters but they are expensive I believe. After that then it's mostly experience and judgement I'm afraid.
So long has the belts isn't guitar string tight or washing line loose then with common sense you will tell if it feels right or wrong.

Regards Backlash then with the 15mm HTD belts I use then I see very little to none, certainly not enough to show in 99.9% of the work I do.
If you look at this Aztec Calendar you'll see the level of detail that can be done with timing belts and if any backlash was present this level of detail wouldn't be possible.!! . . . .(The timing belts were 4yrs old when this was done.! . . .and the screws are 1550mm long.)
VIDEO0021.3gp - YouTube