Hello.
Sorry for off top.

I have some problems with stepper motors.
I just bought motors for axes Х and Y - 85BYGH450C-012 - 85*151 sm - (1600 oz-in), for Z - 85BYGH450D-002 - 85*94 sm (850 oz-in).

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Being guided by calculations - for speed of 4,5 m/min, for ball screw with step 5mm it is necessary to provide 900 rpm with the moment 0,94 N*m (loading 1000 N);
for speed of 6,0 m/min, for ball screw with step 10мм it is necessary to provide 600 rpm with the moment 3,74 N*m (loading 2000 N).
Being guided under diagram from a company website (there for 30 V), these speeds is possible to get (the photo is more low designated by lines).
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Being guided by calculations concerning inductance for the first model it is necessary 150 V, and for the second model 60V, but I plan to powering them from 48 V (or to tighten up till 52-54 V).
The drivers for 25-80V, 8,2 Amp.

Please tell me if i was mistaken in my calculations.