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This seems to be the rule everywhere in the world; that handrails on excalators move slightly slower than do the stairs. The same is true for moving sidewalks. Why?
 

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Bad engeneering pal....:mad: They often use two motors that they don't seem to be able to syncronize. Shouldn't really be a problem with the frequency converters that's available to day.
Kone have solved the problem by having one motor and one chain pull both the steps and handrails;)
 
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