44
1.
S
pecification
s Che
ck
1.2.3 Driving System • Position Detector
Type
Motor Type
Lead
No. of
Encoder
Pulses
Ball Screw Type
Type
Diameter
Accuracy
RA4C
RA4R
35P
2.5
8192
Rolled
8mm
C10
5
10
RA6C
RA6R
42P
3
Rolled
10mm
C10
6
12
RA7C
RA7R
56P
4
Rolled
12mm
C10
8
16
RA8C
RA8R
60P
5
Rolled
16mm
C10
10
20
1.2.4 Positioning Precision
Item
Tolerance
Positioning repeatability
0.01mm
Lost motion
0.1mm or less
This is an option already attached when it is shipped out from the factory. It does not include the
consideration of time-dependent change as it is used.
1.2.5 Rod Tip Load
Type
lead
Item
Tolerance
RA4C
RA4R
2.5, 5,
10
Rod Tip Static Allowable Torque
(Note 1)
1.0N
・
m
Rod Tip Maximum Displacement Angle
(Note 2)
±1.0°
RA6C
RA6R
3, 6, 12
Rod Tip Static Allowable Torque
(Note 1)
1.5N
・
m
Rod Tip Maximum Displacement Angle
(Note 2)
±1.0°
RA7C
RA7R
4, 8, 16
Rod Tip Static Allowable Torque
(Note 1)
2.5N
・
m
Rod Tip Maximum Displacement Angle
(Note 2)
±0.8°
RA8C
RA8R
5, 10,
20
Rod Tip Static Allowable Torque
(Note 1)
5.0N
・
m
Rod Tip Maximum Displacement Angle
(Note 2)
±0.8°
Note 1 Static allowable torque around the rod center
Note 2 These are rod tip displacement angles when they are subjected to rod tip allowable torque at
the position where the rod is retracted the most.