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APPENDIXES
n Load torque (T
)
L
Moving speed
V
Reduction ratio
GL
Speed of motor shaft
N
- When lifting vertically
- When lowering vertically
- When stopping vertically
Mass of moving part
Reduction ratio
GL
Speed of motor shaft
N
- When lifting vertically
- When lowering vertically
- When stopping vertically
Mass of moving part
W
Lead of thread
L
W
Moving speed
V
Diameter of pinion
D
T
L
T
L
T
L
Appendix -4
Ball-screw
( µ W + F ) × 9.81
T
=
L
2 π η
µ
: Coefficient of friction
BP
: Lead of thread [mm]
W, W
: Mass of moving part [kg]
1
W
: Mass of counter-weight [kg]
2
GL
: Reduction ratio (no unit)
F
: Thrust force [kg]
( ( µ + 1 ) W
T
=
L
( ( µ - 1 ) W
T
=
L
(
W
T
=
L
Conveyor, rack and pinion
( µ W + F ) × 9.81
T
=
L
η
µ
: Coefficient of friction
D
: Diameter [mm]
W, W
: Mass of moving part [kg]
1
W
: Mass of counter-weight [kg]
2
GL
: Reduction ratio (no unit)
(( µ + 1 ) W
- W
=
1
2
η
(( µ - 1 ) W
) × 9.81
- W
=
1
2
η
) × 9.81
(
W
- W
=
1
2
η
BP
× GL
3
10
- W
) × 9.81
BP
1
2
2 π η
3
10
) × 9.81
- W
BP
1
2
3
10
2 π η
) × 9.81
- W
BP
1
2
3
10
2 π η
D
1
×
3
2
10
) × 9.81
D
1
×
3
2
10
D
1
×
3
2
10
D
1
×
3
2
10
× GL
× GL
× GL
× GL
× GL
× GL
× GL
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