Checking The Linear Motor By Taking Measurements - Siemens SINAMICS S120 Commissioning Manual

Commissioning
2.10 Commissioning linear motors (servo)
2.10.6

Checking the linear motor by taking measurements

Why make measurements?
If the linear motor was commissioned according to the relevant instructions, and unexplained
fault/error messages still occur, then all of the signals must be checked using an
oscilloscope.
Checking the phase sequence U-V-W
For primary sections connected in parallel, the EMF_U from motor 1 must be in phase with
the EMF_U from motor 2. The same is true for EMF_V and EMF_W.
It is absolutely necessary that this is checked by making the appropriate measurements.
Taking the necessary measurements:
● Disconnect the drive line-up from the power supply.
● Notice: Wait until the DC link has been discharged!
● Disconnect the power cables from the drive.
● Form an artificial neutral point using 1 kOhm resistors.
Figure 2-20
For a positive traversing direction, the phase sequence must be U-V-W. The direction of the
drive is positive if the primary section moves relative to the secondary section in the opposite
direction to the cable outlet direction.
98
Disconnect any primary components connected in parallel.
Configuration for taking the measurements
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
Commissioning