Difference between revisions of "NVGate Torsional"

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NVGate Torsional (view source)

Revision as of 18:00, 8 May 2020

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→‎Fractional missing pulses management
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===Fractional missing pulses management===
The missing pulses are a common situation faced while doing torsional measurement. In the case of a classical flywheel (60:2) it is easy to set and measure excluding this 2 missing pulses. But most of the measurement done on the industry do not offer the comfort of an encoder or gear teeth access.
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A very useful solution is the piano (or zebra) tape which is glued on the shaft and read by an optical probe: Easy to install and to use.
But the main problem is to have an entire number of pulses. This is never achievable because the various parameters are difficult to control: Black/white period, diameter of the shaft, thickness of the tape/glue. Well, don<nowiki>'</nowiki>t try, this is not possible.
The solution is to leave a hole which is interpreted as missing pulse. Due to the above variables it will be a fractional number of missing pulse.
OROS torsional function is able to manage such fractional pulses. It offers to achieve torsional measurement on the field in a simple and easy way.
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<font color="#0070C0"><u>''''' Piano tape junction for fractional missing pulse management'''''</u></font>
The empty area (missing teeth) length at the piano tape junction must be included between 1 and 3 teeth. The number of missing teeth must be set to the exact number of missing teeth: In this example: 2.
Note: the total number of teeth includes the missing teeth.
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