Mechanism for positioning an output member

Details Mechanism for positioning an output member Mechanism for positioning an output member

H - Electricity

02

P

342/22.1

H02P 8/00 (2006.01) G05B 19/40 (2006.01) G05D 3/18 (2006.01) H02P 8/34 (2006.01) H02P 8/36 (2006.01)

Patent

CA 1269435

ABSTRACT MECHANISM FOR POSITIONING AN OUTPUT MEMBER This invention relates to a mechanism for positioning an output member of a mechanical system and in particular a mechanical system that has backlash present. The mechanism has a step motor, regulated by control means, connected to the output member by a mechanical transmission. The control means delivers units of electrical energy to the step motor in response to a number of steps specified to be moved. The control means also has means for detecting whether the step to be performed by the step motor is a single remaining step or single step only. The control means responds to detection of the single remaining step or detection of the single step only by applying a unit of energy to the step motor at a rate that is substantially slower than the rate that would be applied for the other steps.

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