DS-TACHO-4
TECHNICAL REFERENCE MANUAL
4.3.1. Optional Reflector Types
For optional reflector types please contact
Image 9: Different reflector types
4.4. Automatic gap detection
When applying the black/white tape to the rotating shaft there will be an irregular rasterization at the
transition point. This can be used as the zero pulse to indicate a defined start position. On the other
hand this would result in a rpm drop or spike in our rpm measurement.
A software procedure automatically measures the pulses per revolution and also detects the exact gap
length to enable robust and high quality measurement.
Image 11: Gap example
Important
The zero pulse must be at least 3 pulses long.
DS-TACHO-4 V20-1
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