I am trying to calculate the nema23 motor needed for my Z axis.
My Z axis with spindle has 22lbs and chinese ball screw SFU1610 (diameter 16mm / pitch (lead) 10mm)
After much searching for discussions and articles, I found just that
https://buildyourcnc.com/FAQ/879
Is this formula correct? Does it apply to the use of ball screw as well (example is with lead screw)?
Effort = Sf + (Load/(2 x pi x (R/p) x Se))
Load = 97 N (22 lbs)
R = 0.314961 inch (8 mm)
p = 0.393701 inch (10 mm)
Effort = Sf + (Load/(2 x pi x (R/p) x Se))
Effort = 5 N + (97 N / (2 x 3.14 x (.314961 / .393701) x .2))
Effort = 5 N + (97 N / (6.28 x .8 x.2))
Effort = 5 N + (97 N / 1)
Effort = 5 N + 97 N
Effort = 102 N = 22 lbs = 352 oz-in