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6. OPTIONS AND AUXILIARY EQUIPMENT
WARNING
CAUTION
6-1 Dedicated options
6-1-1 Regenerative brake options
CAUTION
(1) Combination and regenerative power
Servo Amplifier
Built-in regenera-
Model
tive brake resistor
MR–J2–10A(1)
Without
MR–J2–20A(1)
10
MR–J2–40A(1)
10
MR–J2–60A
10
MR–J2–70A
20
MR–J2–100A
20
MR–J2–200A
100
MR–J2–350A
100
Note: These values indicate the regenerative powers caused by the resister, not the rated powers.
(2) Selection of the regenerative brake option
1) Simple selection method
In horizontal motion applications, select the regenerative brake option as described below:
When the servo motor is run without load in the regenerative mode from the running speed
to a stop, the permissible duty is as indicated in the standard specifications (Section 10-1).
For the servo motor with a load, the permissible duty changes according to the inertia mo-
ment of the load and can be calculated by the following formula:
Permissible duty=
From the permissible duty, find whether the regenerative brake option is required or not.
Permissible duty < number of positioning times n1 [times/minute]
Select the regenerative brake option out of the combinations in (1) in this section.
Before connecting any option or auxiliary equipment, make sure that the
charge lamp is off more than 10 minutes after power-off, then confirm the
voltage with a tester or the like. Otherwise, you may get an electric shock.
Use the specified auxiliary equipment and options. Unspecified ones may
lead to a fault or fire.
The specified combinations of regenerative brake options and servo am-
plifiers may only be used. Otherwise, a fire may occur.
(Note) Regenerative Power[W]
MR–RB032
MR–RB12
[40Ω]
[40Ω]
30
30
100
30
100
30
100
30
100
30
100
permissible duty for servo motor with no load (value indicated in Section 10-1)
where m = load inertia moment/servo motor inertia moment
MR–RB32
MR–RB30
MR–RB50
[40Ω]
[13Ω]
300
300
300
300
(m+1)
6– 2
[13Ω]
500
500
2
rated speed
(
)
x
[times/minute]
running speed
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