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Stepper Motor Start Control Disclosure Number: IPCOM000068501D
Original Publication Date: 1978-Jan-01
Included in the Prior Art Database: 2005-Feb-20

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Barcomb, JG Hsieh, DM Ross, CO Williams, RA [+details]


In certain stepper motor applications, particularly those using linear motors, the motor is repetitively stopped and restarted within a vibrating environment due either to the motor support or its load. It is then difficult to closely control acceleration even with closed loop operation since load inertia may be opposing or aiding the intended direction of movement. The result is that there may be extra feedback pulses from the position transducer or the pulses may come too soon after the initial motor advance pulse, causing broken phases or overshooting of the target position.