MHT258a (Engl.)
11-5
(d) Torque determination
Ball-screw
Ｗ
ＧＬ
Ｎ
Ｖ
BP
T
L
W F
BP
GL
=
+
×
æ
èç
ö
ø÷
×
(
)
.
µ
πη
9 81
2
10
3
・
T
L
at load lifting :
T
L
W W
BP
GL
=
+
×
æ
èç
ö
ø÷
×
((
)
)
.
µ
πη
1
9 81
2
10
1
2
3
−
・
T
L
at lowering :
T
L
W W
BP
GL
=
×
æ
èç
ö
ø÷
×
((
)
)
.
µ
πη
−
−
1
9 81
2
10
1
2
3
・
T
L
at stop (servo lock) :
T
L
W W
BP
GL
=
×
æ
èç
ö
ø÷
×
(
)
.
1
2
3
9 81
2
10
−
πη
Rack and pinion, conveyor
Ｗ
ＧＬ
Ｖ
Ｎ
Ｄ
T
L
W F
D
GL
=
+
×
×
æ
èç
ö
ø÷
×
(
)
.
µ
η
9 81
2
1
10
3
・
T
L
at load lifting :
T
L
W
W
D
GL
=
+
−
×
×
æ
èç
ö
ø÷
×
((
)
)
.
µ
η
1
9 81
2
1
10
1
2
3
・
T
L
at lowering :
T
L
W
W
D
GL
=
−
−
×
×
æ
èç
ö
ø÷
×
((
)
)
.
µ
η
1
9 81
2
1
10
1
2
3
・
T
L
at stop (servo lock) :
T
L
W
W
D
GL
=
−
×
×
æ
èç
ö
ø÷
×
(
)
.
1
2
3
9 81
2
1
10
η
Where
BP : Screw-pitch [mm]
D : Pulley, pinion or roll diameter [mm]
F : Thrust (axial) force (opposes feed on is + direction)
GL : Reduction speed ratio
J : Moment of inertia, total
J
L
: Ditto, load parts
J
M
: Ditto, motor rotor
where,
J
L
= J
M
x 100 : Load of low moving velocity
J
L
= J
M
x 50 : Load of positioning
J
L
= J
M
x 10 : Load of high frequent positioning
L : Length or distance of parts
N : Motor speed
T
L
: Load torque, total
v : Moving velocity
W : Mass (weight)
W
1
: Ditto, movable part
W
2
: Ditto, counter movable part
η
: Mechanical efficiency
μ
: Friction coefficient
Summary of Contents for Faldic-a Series
Page 1: ...RYS V Type User s Manual MHT258a Engl...
Page 55: ...3 28 MHT258a Engl 2 RYS amplifier a 0 03 to 0 2 kW 5 5 150 0 5 0 5 53 60 160 130...
Page 56: ...3 29 MHT258a Engl b 0 4 kW 160 130 60 80 53 150 0 5 0 5 5 5...
Page 57: ...3 30 MHT258a Engl c 0 75 kW 130 160 60 100 54 39 0 5 0 5 150 0 5 0 5 5 5...
Page 58: ...3 31 MHT258a Engl d 1 to 1 5 kW 160 130 60 115 54 54 0 5 0 5 150 0 5 0 5 5 5 Cooling fan...
