Chapter 1 Overview of the RSF-B mini series
- 7 -
1-7 One-way positioning accuracy
The following table shows the “one-way positioning accuracy”.
The following table contains representing values. (JIS B 6201:1987)
The one-way positioning accuracy of RSF-B mini actuators is almost equal to the angular positioning
accuracy of the HarmonicDrive
®
gearing, because the effect on the positioning error of the built-in
motor is reducted by the gearing.
The accuracy for each gear ratio is shown below.
Mode
Item
RSF-8B
RSF-11B
RSF-14B
30
50 100
30
50
100
30
50
100
One-way
positioning
accuracy
arc min
3
2.5
2.5
2
2.5
2
rad
8.73
×
10
-4
7.27
×
10
-4
7.27
×
10
-4
5.82
×
10
-4
7.27
×
10
-4
5.82
×
10
-4
■
Reference
(Accuracy display and measurement method according to JIS B 6201: 1987)
●
One-way positioning of rotation shaft motion
First, perform positioning at any one position in a fixed
direction. This position is the reference position. Next,
perform positioning in succession in the same direction,
and measure the difference between the angle actually
rotated from the reference position and the desired angle
at each position. The maximum difference in one
rotation among these values is taken as the
measurement value. Measurement of equipment with
the continuous positioning function for rotational motion
shall be done once per 30 degrees or 12 positions
throughout the entire rotation range as a rule.
Start position
Actual position
One-way positioning
accuracy
Positional difference
