Bosch DOK-MOTOR-MCL Series, Project Planning Manual

Page: 177 / 196

the power to be switched on nor the axes to be moved. Commutation adjust‐
ment need only be performed during the first-time commissioning.
This procedure requires an absolute length measuring system.
Measuring the relative position be‐
tween primary and secondary part
Depending on the accessibility of primary and secondary part in the machine
or system, the relative position between primary and secondary part can be
measured in different ways.
l Relative position reference point ①
b Relative position reference point ②
l
P
Length primary part
Fig. 14-5: Measuring the relative position between primary and secondary part
From now on, the position of the primary part must not be
changed until the commutation adjustment procedure is termina‐
ted!
Calculation of P-0-0523, commu‐
tation adjustment measured value
The input value for P-0-0523 that is required for calculating the commutation
offset, is determined from the measured relativce position of the primary part
with respect to the secondary part (Fig. 14-5 , distance d, e, f or g, depending
on accessibility), and a motor-related constant k
mx
(see Fig. 14-6 und Fig.
14-5 ).
P-0-0523 Commutation adjustment measured value in mm
l Relative position reference point ① in mm (Fig. 14-5 )
b Relative position reference point ② in mm (Abb. 14-5 )
k
mx
Motor constant for commutation adjustment in mm
l
P
Length of primary part in mm
Fig. 14-6: Calculation of P-0-0523, commutation adjustment measured value
Ensure that the sign is correct when you determine P-0-0523,
commutation adjustment measured value. If P-0-0523 is deter‐
mined with a negative sign, this must be entered when the setup
procedure is started.
Motor constant k
mx
for commuta‐
tion adjustment
DOK-MOTOR*-MCL********-PR05-EN-P Bosch Rexroth AG 175/193
Rexroth IndraDyn L Ironless Linear Motors MCL
Commissioning, operation and maintenance