Pwt 10/17/18 Testing Unit - HEIDENHAIN iTNC 530 Service Manual

Hide thumbs Also See for iTNC 530:

Table of Contents

29.4 PWT 10/17/18 Testing Unit

The PWT testing unit was originally designed as mounting aid for scanning heads.

However, it is also possible to check signals (A track, B track, reference mark) of motor

Three different PWT versions are available:

Encoder diagnostic set

For HEIDENHAIN motor encoders, the PWT 18 is used for 1 Vpp signals.

The PWT 18 cannot be connected in series between

The encoder is connected to and powered by the PWT 18.

The signals of scales or scale tapes can be observed during traverse with indirect position

measurement (i.e. the motor encoder is used for positioning).

This means that the signals of the position encoder could also be checked at "operating

For inspecting a motor encoder, the encoder or the motor shaft must be rotated externally

(e.g., manually).

Thus, motor encoder signals can hardly be checked at operating speed.

The signal amplitude is also measured when the encoder has stopped.

For a detailed assessment of the signal quality, an inspection of the position or speed encoder

with the PWM 9 is recommended.

HEIDENHAIN Service Manual iTNC 530

encoder and control.

Show Quick Links

Table of Contents