Mechanism for positioning an output member

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

1986-04-15

1987-07-14

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

046805249

ABSTRACT:
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.

REFERENCES:
patent: 4340946 (1982-07-01), Kanno et al.
patent: 4361410 (1982-11-01), Nakajima et al.

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