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Conditions of the Ball Screw

Conditions of the Ball Screw

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The following conditions are required when selecting a Ball Screw.
Transfer orientation (horizontal, vertical, etc.)
Transferred mass m(kg)
Table guide method (sliding, rolling)
Frictional coefficient of the guide surface μ(-)
Guide surface resistance f(N)
External load in the axial direction F(N)
Desired service life time Lh(h)
Stroke length s(mm)
Operating speed Vmax(m/s)
Acceleration time t1(s)
Even speed time t2(s)
Deceleration time t3(s)
Acceleration
(m/s2)
Acceleration distance 1=Vmax×t1×1000/2(mm)
Even speed distance 2=Vmax×t2×1000(mm)
Deceleration distance 3=Vmax×t3×1000/2(mm)
Number of reciprocations per minute n(min-1)
Positioning accuracy (mm)
Positioning accuracy repeatability (mm)
Backlash (mm)
Minimum feed amount s (mm/pulse)
Driving motor (AC servomotor, stepping motor, etc.)
The rated rotation speed of the motor NMO(min-1)
Inertial moment of the motor JM(kg・m2)
Motor resolution (pulse/rev)
Reduction ratio A(-)