Harmonic Drive FHA-Cmini Series, Manual

Page: 44 / 68

2-4 Examining operating status
Selection guidelines
2-7
1
2
3
4
5
6
7
8
9
10
11
Apx
Se
lec
tion gui
de
lin
es
2-4 Examining operating status
The actuator generates heat, and starting and braking currents to the motor flow at a high frequency if
during its active state it is started/stopped repeatedly (duty cycle). Therefore, it is necessary to
examine the duty cycle.
The study is as follows:
Examining actuator rotation speed
Calculate the required rotation speed (r/min) of the load driven by the FHA-C mini series.
For linear operation, use the rotation speed conversion
formula below:
Select an appropriate reduction ratio from the 30, 50 or
100 series so that the calculated rotation speed does not
exceed the maximum rotational speed of the FHA-C mini
series actuator.
Calculating and examining load inertia moment
Calculate the inertia moment of the load driven by the FHA-C mini series actuator.
Refer to appendix 2 (Apx-3) for the calculation.
Based on the calculated result, tentatively select a FHA-C mini series actuator by referring to
[Allowable load inertia moment] (P2-1).
(mm) pitch mechanism feed Screw
(mm/min) speed Linear
= (r/min) speed Rotation
100 1000 3000 30 300
1
10
30
3
100 r/min
70 r/min
50 r/min
35 r/min
Linear speed (mm/min)
Screw pitch (mm)
Rotation speed (r/min)
200 r/min