HEIDENHAIN PWM 20 - Manual (Page 160)

November 2014 Checking incremental encoders 163
Bar display of
reference signal Display of the signal parameters and tolerances as bar graphs with tolerance markings.
Recommendation:
Traverse the reference mark(s) from both sides; on encoders with distance-coded reference
marks make random samples and check "faulty" areas.
Standard signal amplitudes and tolerance ranges of the reference signal
1 Vpp 11 µApp
min. typical max. min. typical max.
L R - 60 0 + 60 - 60 0 + 60
B R 180° 360° 540° 180° 360° 540°
R R 0.04 V - 1.7 V 0.4 µApp - 25 µApp
N R 0.2 V - 0.85 V 0.2 V - 0.85 V
S R 0.2 - 0.8 0.2 - 0.8
Note
The stated tolerances are HEIDENHAIN standard values.
High-accuracy encoders (e.g. angle encoders), encoders for large temperature ranges
(e.g. motor encoders) or for high speeds may have different limit values.
Please always refer to the original documentation of the encoders to be checked (mounting
instructions).
In case of doubt, contact the HEIDENHAIN helpline (see chapter “Contacts” on page 243).