Service Manual 4-15Check Shafts MenuDeskew ShaftRuns the media path drive train and engages the deskew clutch on the fly then disengages theclutch. The test is repeated in both directions to determine clutch characteristics, steady statedrive requirements, bearing status, etc.R# DefinitionTypicalValue Actions0 Time to CCW Onpeak fe (sec).0.01 to0.04Reports how long it takes the MP motor servosystem to react to the sudden addition of thedeskew shaft load.Larger values may show a slipping/slow toengage clutch.1 CCW On peak fe. 540 to750Reports peak effort needed to accelerate thedeskew shaft load. A smaller value couldindicate a slipping clutch.2 CCW On fe settlingtime (sec).0.017 to0.21Reports the time it takes the MP motor servosystem to "settle down" after the suddenaddition of the deskew shaft load.A longer time could indicate a looseness in thedeskew shaft assembly or a slipping clutch.3 CCW On average fe. 250 to600Reports the average effort required to rotatethe deskew shaft in the CCW direction at aconstant velocity.An unusual value could indicate a difference inthe composition and/or number of the rollers,the nip pressure, or out of range mechanicaldimensions due to wear or contamination(such as paper dust increasing the effectivediameter of a roller).4 CCW On fe ripple. 115 to360Reports the variation of effort required to rotatethe deskew shaft in the CCW direction at aconstant velocity.A larger value could indicate particles in thegears or non uniform contamination of a roller(causing a lump).5 CCW Off fe settlingtime (sec).0.010 to0.20Reports the time it takes the MP motor servosystem to "settle down" after the suddenrelease of the deskew shaft load.A larger value can indicate a slow to release ordragging clutch.6 Time to CW Onpeak fe (sec).0.010 to0.06Reports a time that indicates how long it takesthe MP motor servo system to react to thesudden addition of the deskew shaft load.Larger values may indicate a slipping or slow toengage clutch.
