Fuji Electric ALPHA5 Smart - Page 612

CHAPTER 15 APPENDIXES
15-20
Capacity Selection Calculation
15
Ball screw
µ: Friction coefficient BP: Screw lead [mm]
W, W
1
: Mass of moving parts [kg]
W
2
: Mass of counterweight [kg]
GL: Reduction ratio (no unit) F: Thrust [kg]
 Hoisting (vertically)
 Descending (vertically)
 At a stop (vertically)
Conveyor and rack & pinion
µ: Friction coefficient D: Diameter [mm]
W, W
1
: Mass of moving parts [kg]
W
2
: Mass of counterweight [kg]
GL: Reduction ratio (no unit)
 Hoisting (vertically)
 Descending (vertically)
 At a stop (vertically)
 Calculation of load torque (TL)
２πη
（μＷ＋Ｆ）×９．８１ ＢＰ
１０
3
Ｔ
Ｌ
＝
× ＧＬ
２πη
（（μ＋１）Ｗ
1
－Ｗ
2
）×９．８１ ＢＰ
１０
3
Ｔ
Ｌ
＝
× ＧＬ
２πη
（（μ－１）Ｗ
1
－Ｗ
2
）×９．８１ ＢＰ
１０
3
Ｔ
Ｌ
＝× ＧＬ
２πη
（ Ｗ
1
－Ｗ
2
）×９．８１
ＢＰ
１０
3
Ｔ
Ｌ
＝× ＧＬ
Ｄ
２
η
（μＷ＋Ｆ）×９．８１
Ｔ
Ｌ
＝
× ＧＬ
×
１
１０
3
× ＧＬ
Ｄ
２
Ｔ
Ｌ
＝
×
１
１０
3
η
（（μ＋１）Ｗ
1
－Ｗ
2
）×９．８１
η
（（μ－１）Ｗ
1
－Ｗ
2
）×９．８１
Ｔ
Ｌ
＝
Ｄ
２
× ＧＬ
×
１
１０
3
η
（ Ｗ
1
－Ｗ
2
）×９．８１
Ｔ
Ｌ
＝
Ｄ
２
× ＧＬ
×
１
１０
3
Traveling speed
V
Mass of moving parts
W
Screw lead
L
Reduction ratio
GL
Rotation speed of
motor shaft
N
Rotation speed of
motor shaft
N
Reduction ratio
GL
Traveling speed
V
Mass of moving parts
W
Diameter of pinion
D