Chapter 11 Selection
11-18
(3) Obtaining the tolerable No. of positionings
The tolerable cycle operation frequency per minute DP is calculated respectively for the standard
built-in regeneration resistor and option regeneration resistor.
Refer to expression (11-11).
• Standard built-in regenerative resistor
DP
0 = 48 ·
P
R
E
R
= 48 ×
100
929.6
= 5.2 (times) No. of positionings = 10.4 (times)
• MR-RB30 (300W)
DP
1 = 48 ·
P
R
E
R
= 48 ×
300
929.6
= 15.5 (times) No. of positionings = 31.0 (times)
• MR-RB50 (500W)
DP
2 = 48 ·
P
R
E
R
= 48 ×
500
929.6
= 25.8 (times) No. of positionings = 51.6 (times)
Because the No. of times described above is the No. of cycle operations for 1 return for a vertical
axis, the No. of positionings is 2-fold. Thus, it is shown that the MR-RB30 (300W) option resistor
is required to satisfy the specified positioning frequency of 20 times/min.
POINT
Try to choose a resistor with some allowance in the vertical axis, because the
regeneration load can easily become large compared to a horizontal axis.
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