Microprocessor-assisted sewing machine control equipment
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United States of America Patent
Stats
-
Nov 18, 2003
Grant Date -
Sep 4, 2003
app pub date -
Feb 27, 2003
filing date -
Mar 2, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A microprocessor-assisted sewing machine control equipment is flexibly applicable for controlling the sewing machine driving motor and further electric motors which are controlled independently of or in dependence on the rotary position. To this end, a control system is allocated to each electric motor, comprising an open-loop control unit for rotary-position-independent controlling, a closed-loop control unit for controlling the electric motor in dependence on the rotary position, and a selection unit. The selection unit couples for control either the closed-loop control unit or the open-loop control unit with the electric motor, depending on whether the electric motor is controlled by closed-loop control in dependence on the rotary position or by open-loop control independently of the rotary position.
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