REXROTH MKD025A-144, Manual

Page: 33 / 184

Synchronous Motors MKD MKD Type Code
4-3
DOK-MOTOR*-MKD*******-PR07-EN-P Version7.0 19.05.2004
5. Motor feedback
MKD motors are equipped with an integrated encoder system (motor
feedback). To control the motor speed and/or to position the motor, the
drive controller requires information on the current motor position.
To achieve this, the integrated encoder system (motor feedback) makes
the appropriate signals available to the drive controller.
The following options are available:
Option Type Type of position detection
N Resolver-feedback (RSF) Relative
P
Resolver feedback (RSF with
integrated multiturn absolute
encoder
Absolute
(more than 4096 revolutions)
Fig. 4-5: MKD motor encoder
6. Output Shaft
To connect the machine elements to be driven to the motor shafts, the
following options are available for MKD motors.
Option Design Detail
G Plain shaft
P
Shaft with keyway
1)
With end-sided centering hole with “DS”
thread according to DIN 332, Part 2,
Edition 05.83
1) Keyway according to DIN 6885, Sheet 1, ed. 08.68. For details, refer to the
motor rating sheet!
Fig. 4-6: MKD output shafts
Note: MKD motors are balanced with the complete featherkey. The
pertinent featherkey is not included in the scope of delivery.
7. Holding Brake
Optional. Required for clamping the servo axis when the machine is in
the de-energized state.
Option Holding Brakes
0 Without holding brake
1, 3 With holding brake Please refer to the motor type codes for
the holding torques.
Fig. 4-7: MKD holding brakes
The holding brake is operated according to the “electrically releasing”
principle. In the de-energized state, a magnetic force acts upon the
brake armature disk. This causes the brake to close and to hold the axis.
By applying 24 V
DC
(
±
10%), the permanent magnetic field is
compensated by the electrically generated magnetic field: the brake
opens.
Note: Please also observe the installation and safety instructions on
the motor holding brakes in the chapter entitled “Application
Instructions”.
Abbrev. column 13
Abbrev. column 14
Abbrev. column 15