Quote Originally Posted by Jonathan View Post
If you stick with the 1605 screws then option 1 (1:2 to get 10mm effective pitch) will work substantially better than 1:1.'
You can't say that without knowing what's being done with machine.? 1610 doesn't work better it just allows higher speeds and if those speeds aren't needed then there's no point.! . . . Infact it's wasted resolution/torque.

That said I didn't realise Adil bought 5mm pitch screws for all axis and believe he mainly wants to cut wood in which case 10mm pitch would have been better suited. But as we know it's not the end of the world and with belt gearing easy sorted.

Regards Micros stepping then Really you shouldn't consider micro stepping for resolution it's biggest help is with smoother operation of the motors at lower speeds and like Jon says it helps with resonance. Just remember the higher you set the resolution the harder the Parallel port has to work putting out more pulses's for the same movement so you'll need a good PP port other wise you could easily lose steps. More than 2000(10x) micros steps is pointless really has most of the Cheaper motors can't resolve to higher than that.