2 System Configuration
2
05.01
2.4 Position sensing/speed actual value sensing
2-28
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
An additional position measuring system with TTL signals can be connected at
the main spindle control to directly sense the spindle position, or the spindle
signals can be output for further processing. The HGL module is optionally avai-
lable if it is necessary to transfer high–resolution position actual values to a nu-
merical control, when using 1PH motors with C–axis quality. This allows a reso-
lution of up to 90,000 increments per revolution to be achieved by multiplying
the motor encoder pulse signals (e.g. toothed–wheel encoders for 1PH2 mo-
tors).
The optimum measuring system for position sensing is suitable to evaluate in-
cremental encoders with sine–cosine voltage signals. Linear scales and rotating
encoders with sinusoidal voltage signals can be connected to the drive control
systems to operate 1FT6 and 1FK6 feed motors. The measuring signals, recei-
ved from the encoder system, are evaluated with a high resolution.
Example:
Using a linear scale (20 µm grid constant), a position resolution of 0.01 mm
(Performance control) can be achieved.
Main spindle
drive module
analog system
SIMODRIVE 611
digital, universal
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