CHAPTER 15 APPENDIXES

 Calculation of load torque (TL)

Traveling speed

V

Mass of moving parts

W

Reduction ratio

GL

Screw lead

L

Rotation speed of

motor shaft

N

 Hoisting (vertically)

 Descending (vertically)

 At a stop (vertically)

Mass of moving parts

W

Reduction ratio

GL

Rotation speed of

motor shaft

N

Traveling speed

V

Diameter of pinion

D

Ball screw

ＴＬ＝

（μＷ＋Ｆ）×９．８１

２πη

ＢＰ

×　ＧＬ

１０3

µ: Friction coefficient

BP: Screw lead [mm]

W, W1: Mass of moving parts [kg]

W2: Mass of counterweight [kg]

GL: Reduction ratio (no unit) F: Thrust [kg]

ＴＬ＝

（（μ＋１）Ｗ1－Ｗ2）×９．８１

２πη

ＢＰ

×　ＧＬ

１０3

ＴＬ＝

（（μ－１）Ｗ1－Ｗ2）×９．８１

２πη

ＢＰ

１０3 ×　ＧＬ

ＴＬ＝

（　　　　　Ｗ1－Ｗ2）×９．８１

２πη

ＢＰ ×　ＧＬ

１０3

Conveyor and rack & pinion

ＴＬ＝

（μＷ＋Ｆ）×９．８１

η

Ｄ

１

２ × １０3

×　ＧＬ

µ: Friction coefficient

D: Diameter [mm]

W, W1: Mass of moving parts [kg]

W2: Mass of counterweight [kg]

GL: Reduction ratio (no unit)

15

 Hoisting (vertically)

 Descending (vertically)

 At a stop (vertically)

ＴＬ＝

ＴＬ＝

（（μ＋１）Ｗ1－Ｗ2）×９．８１

η

（（μ－１）Ｗ1－Ｗ2）×９．８１

η

ＴＬ＝

（　　　　　Ｗ1－Ｗ2）×９．８１

η

Ｄ

１

２ × １０3 ×　ＧＬ

Ｄ

１

２ × １０3 ×　ＧＬ

Ｄ

１

２ × １０3 ×　ＧＬ

15-20 Capacity Selection Calculation