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John Morehead, national
sales manager of Crouzet Motors
(Vista, CA), was bunkered
down in his office in Palatine,
IL surrounded at all points by
ankle-deep snow from an unfortunately
terrible Chicago’s
winter night.
Let’s be clear about something
up front here: Delta Gear does not make parts for lawnmowers. This is a fairly flippant point that falls under the timeless, clichéd designation of “goes without saying.” Yet, not all that long ago,Tony Werschky had to say it.
It seems preposterous in the whimsical, wireless world of today, but in 1977 cinema’s greatest visioneers came together and decided the pinnacle of robotic technology in the future would be a motorized trash can.
The use of motor current signature analysis (MCSA) for motor fault detection — such as
a broken rotor bar — is now well established. However, detection of mechanical faults
related to the driven system remains a more challenging task. Recently there has been a growing interest for detection of gear faults by MCSA. Advantages and drawbacks of these
MCSA-type techniques are presented and discussed on a few industrial cases.
Wear is a very important topic for dry running plastic gears. Over the past few years,
the authors have worked closely with a number of manufacturers of plastic gears
to investigate the problems of gear wear in detail. Together they have developed a calculation method that can be used to predict where and when local wear will occur on a tooth flank. Their findings have also just been published in the final version of VDI 2736.