THK ET20 Series, Manual

Page: 10 / 28

ET20
Controller Specification
Basic Specifications
Model Number Coding
Selection Information
Motor
wrap
Body height
30 mm
Stepper
motor
20×20
Turn
table
type
Servo motor
30 W
Servo motor
20 W
If "TS" is selected for ④ With or without motor/controller type,
selections must be made for
⑦
to
⑨
.
Model
Reduction
ratio
Stroke
With or without motor/
controller type
Motor
bracket
Sensor Motor size Home position Cable length
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
ET20 — 45 — 360 — 0 — A — U / 20P — D00 — S3
ET20 45 : 1/45 330 : 330°
TS : Stepper Driver
Controller TSC
No symbol : None No symbol : None
20P : Stepper motor
20×20
No symbol
: Multi-rotation
specifications
No symbol : None
360
: Multi-rotation
specifications
1
A : Stepper motor type
U : Sensor S3 : Standard 3 m
0 : Without motor D00 : Counter-clockwise movement S5 : Standard 5 m
1
: With motor
(THK will purchase
and mount the
motor you specify)
B
: Servo motor type
R00
: Clockwise movement
SA
: Standard 10 m
2 Varies based on angular velocity. See p. 10 "Angular Velocity versus Output Torque" graph for
details.
Motor size 20×20
Stroke (one side) (°) 330 or 360
Drive system Hypoid gear
Output shaft bearing Cross-roller ring
Reduction ratio 1/45
Max. permissible load torque (N·m) 0.3
Max. permissible moment of inertia (k
g
·m
2
) 0.0057
Max. angular velocity (°/s) 270
Max. angular acceleration (°/s) 2000
Positioning repeatability (°) ±0.04
Backlash
3
(°) 0.2
Permissible axial load
4, 5
(N) 30
Permissible radial load 4, 5 (N) 13.2
Permissible moment
4, 5
(N·m) 3.6
Permissible input torque (N·m) 0.039
Mass
6
(k
g
) 0.52 (0.35)
3
Depending on usage conditions, minor wear to the hypoid gear may cause increased
backlash.
4
Please use with a safety margin of 1.5 or greater.
5
This is the permissible value when loaded in one direction.
6 Values in parentheses are for no motor specifications.
Control device TSC
Motor size 20×20
Reduction ratio 1/45
Max. output torque 2 (N·m) 0.3
Max. permissible moment of inertia (k g ·m 2 ) 0.0057
Permissible Load and Permissible Moment
Axial
Moment
Moment Radial
1
There are conditions for
using the product under
TSC specifications in
continuous rotation in one
direction. Please contact
THK for more information.
The available sensor
options vary based on
the stroke.
330: No Symbol
360: U
360° stroke (multi-rotation)
uses a homing sensor (1 m
cable).
D00 and R00 use mechanical homing.
R00
D00
9