BECKHOFF AL2000 Linear servomotor - Manual (Page 31)

Mechanical installation
7.4.3 Calculation of the offset
The wiring must be done according to the layout of the coil units. The offset must be determined in order to
do this. The offset specifies the number of coils by which the rotary field is shifted in the second motor. The
wiring of the motors can be determined with the help of the offset and the table in the section entitled Layout
of the wiring [
} 31].
The offset is calculated using the following equation:
Offset = (PD
M1M2
/ 16) MOD 3
Calculation of the offset for example 1:
Offset = (304 / 16) MOD 3
= 19 MOD 3 = 1
Calculation of the offset for example 2:
Offset = (272 / 16) MOD 3
= 17 MOD 3 = 2
7.4.4 Layout of the wiring
Using the offset calculated in the previous section, the wiring of the coupled motors can be done on the basis
of the following table. For each case the table shows how the phases of motor 1 (L1, L2, L3) are connected
to the phases of motor 2 (L1’, L2’, L3’).
Cables of the motors
point in the same direc­
tion Cables of the motors
point outwards Cables of the motors
point inwards
Offset = 0 L1/L1‘ L2/L2‘ L3/L3‘ L1/L1‘ L2/L3‘ L3/L2‘ L1/L1‘ L2/L3‘ L3/L2‘
Offset = 1 L1/L3‘ L2/L1‘ L3/L2‘ L1/L2‘ L2/L1‘ L3/L3‘ L1/L3‘ L2/L2‘ L3/L1‘
Offset = 2 L1/L2‘ L2/L3‘ L3/L1‘ L1/L3‘ L2/L2‘ L3/L1‘ L1/L2‘ L2/L1‘ L3/L3‘
Linear servomotor AL2xxx 31 Version 4.0