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Operating Manual
MHM-97442
Figure 5-30: Diagram symmetry 50% - TTL signal
A. Pulse width = Pulse pause (B-A)
B. Pulse width + Pulse pause
Figure 5-31: Diagram symmetry 20% - TTL signal
A. Period portion <50%
B. Pulse width + Pulse pause
The symmetry value always based on the period portion <50%.
At machine standstill determine the expected pulse width ratio by means of the trigger
wheel dimensions. The symmetry declaration is based either on the tooth width or on the
gap width depending on which width is less than 50% related to the pitch.
Figure 5-36
profile and with chamfered flanks. Calculate the symmetry with the following formula.
Tooth width ≤50%:
Symmetry = Tooth width
Gap width ≤50%:
Symmetry = Gap width
Example with Tooth width ≤50% = 9 mm and Tooth width + Gap width = 45mm:
Symmetry = 9 mm*100% / 45 mm = 20%
MHM-97442, Rev. 2.06
show symmetry examples based on a trigger wheel with rectangular tooth
*100% / (Tooth width
≤50%
*100% / (Gap width
≤50%
+ Gap width)
≤50%
+ Tooth width)
≤50%
Configuration
February 2023
Figure 5-32
to
105
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