19 – 314 HEIDENHAIN Service Manual iTNC 530 HSCI
19.4 Further examination of position and speed encoders
Introduction If you want to make further examinations of incremental and absolute HEIDENHAIN encoders, you
can use special HEIDENHAIN measuring equipment.
The HEIDENHAIN measuring equipment described below can also be used for preventive
maintenance.
If you find out, for example, that the specifications (e.g. the signal amplitude) of an encoder are very
close to the tolerance limits, you can replace this encoder as a preventive measure, in order to guard
against machine standstill at a later date!
PWM 9 With the PWM 9 Phase Angle Measuring Unit you can examine incremental encoders as well as the
incremental signals of EnDat encoders.
--> See ”PWM 9 encoder diagnostic kit” on page 30 – 564.
Photo: Example of a recording with the PWM 9
If the PWM 9 is connected in the signal path between the encoder and the control:
Do not change the settings of the PWM 9 (e.g., parameters, encoder voltages) and do not
switch it off while the machine tool is operating.
Ignoring this may cause machine damage or personal injury!
Read the User's Manual of the PWM 9 in detail, before you use the device.
A detailed explanation of the device is part of our training courses on measuring systems.
We recommend that you participate in a HEIDENHAIN service training course so that you can
use the PWM 9 correctly and efficiently.
Contact HEIDENHAIN Traunreut or your regional agency.
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