HEIDENHAIN PWM 20 - Manual (Page 154)

November 2014 Checking incremental encoders 157
Incremental signal
bar graphs Display of the signal parameters and tolerances as bar graphs with tolerance markings.
The bar graphs of the sinusoidal signals Sig A, Sig B and the on-to-off ratios TV A and TV B are
also displayed at standstill, as these are calculated through circularity analysis.
Note
This function is suitable for mechanically aligning exposed linear encoders. By this means
the air gap and the parallelism of the scanning heads to the graduation can be adjusted
without mechanical movement.
For an exact diagnosis always check (traverse) the entire measuring range!
All signals within the tolerance Several signals out of tolerance