Bosch rexroth MCL, Project Planning Manual

Page: 186 / 206

switching and axis motion. Commutation adjustment only needs to be carried
out on initial commissioning.
This procedure requires an absolute length measuring system.
Measuring of the relative position
of the primary to the secondary
part
Depending on the accessibility of the primary and secondary part in the ma‐
chine or system, the relative position of the primary to the secondary part
may be calculated in different ways:
a Relative position reference point ①
b Relative position reference point ②
l
p
Primary part length
Fig. 14-5: Measuring of the relative position of the primary to the secondary
part
The position of the primary part must not be changed before the
procedure for commutation adjustment is completed!
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 relative position of the primary part
with respect to the secondary part (Fig. 14-5 , distance a or b, depending on
accessibility), and a motor-related constant k
mx
(Fig. 14-6 and Fig. 14-6 ).
P-0-0523 Commutation adjustment measured value in mm
a Relative position reference point ① in mm (Fig. 14-5 )
b Relative position reference point ② in mm (Fig. 14-5 )
k
mx
Motor constant for commutation adjustment in mm
l
p
Primary part length 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 also be entered in the be‐
ginning of the setting procedure.
Motor constant k
mx
for commuta‐
tion adjustment
Primary part
k
mx
in mm
MCP020 24.1
MCP030 / 040 / 070 49.6
Tab. 14-6: Motor constant k
mx
for commutation adjustment
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Commissioning, operation and maintenance
MCL Ironless Linear Motors
Bosch Rexroth AG R911330592_Edition 06