HEIDENHAIN PWM 20 - Manual (Page 156)

November 2014 Checking incremental encoders 159
Standard signal
amplitudes and
tolerance ranges
Designations of the bar graphs and calculations
The following information and formulas refer to the interface description and the signal diagrams
in there (see chapter “Interface description” on page 209).
1 Vpp 11 µApp (25 µApp)
min. typical max. min. typical max.
Sig A and Sig B 0.6 Vpp 1 Vpp 1.2 Vpp 7 µApp
(15 µApp)
11 µApp
(25 µApp)
16 µApp
(35 µApp)
A / B 0.8 1 1.25 0.8 1 1.25
Pha 80 ° 90 ° 100 ° 80 ° 90 ° 100 °
TV A and TV B - 15 ° 0 ° + 15 ° - 15 ° 0 ° + 15 °
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).
Note
You can find the standard signal amplitudes and tolerances in the interface
descriptions.
Always observe the tolerances stated in the original documentation (mounting
instructions, etc.) of the encoder to be checked!
In case of doubt, contact the HEIDENHAIN helpline (see chapter “Contacts” on
page 243).