Chapter 4
Operation
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Dynamic brake is an emergency stop function, and one of the general methods to cause a servomotor
sudden stop.
Dynamic brake suddenly stops a servomotor by shorting its electrical circuit.
If the servomotor is frequently started and stopped by turning the power ON/OFF or using the servo ON
signal(/S-ON), the DB circuit will also be repeatedly operated, degrading the servodrive’s internal
elements.
Use the speed input reference and position reference to control the starting and the stopping of the
servomotor.
(4)Setting
(4)Setting
(4)Setting
(4)Setting the
the
the
the Stop
Stop
Stop
Stop Torque
Torque
Torque
Torque for
for
for
for Overtravel
Overtravel
Overtravel
Overtravel
·After changing these parameters, turn OFF the main circuit and
control power supplies and then turn them ON again to enable the
new settings.
·Stop by dynamic brake: Stops by using the dynamic brake (with
short-circuiting by a circuit of servodrive).
·Coast to a stop: Stops naturally, with no brake, by using the friction
resistance of the servomotor in operation.
·Plug braking: Stops by using plug braking limit torque.
·Zero Clamp Mode: A mode forms a position loop by using the
position reference zero.
Servomotor
Servodrive
Pn405
Pn405
Pn405
Pn405
Plug
Plug
Plug
Plug braking
braking
braking
braking torque
torque
torque
torque limit`
limit`
limit`
limit`
Setting
Setting
Setting
Setting Range
Range
Range
Range
Setting
Setting
Setting
Setting Unit
Unit
Unit
Unit
Factory
Factory
Factory
Factory Setting
Setting
Setting
Setting
Setting
Setting
Setting
Setting Validation
Validation
Validation
Validation
0
～
300
1%
300
Immediately
·
This sets the stop torque for when the overtravel signal(P-OT,N-OT) is input.
· The setting unit is a percentage of the rated torque.(the rated torque is 100%)
· The value large enough to be the servomotor maximum torque, 300% is set as the factory setting for
plug braking limit torque.However, the actual output plug braking limit torque is determined by servomotor
ratings.
Speed
Position
Torque
