Apparatus and method for controlling sewing machine
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsSatomi Yamauchi, Hisaaki Tsukahara, Hiroshi Yamada, Osamu Gouta
Life of this patent
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Abstract
A sewing machine having a motor drive operating in response to a controller to rotate in forward and reverse rotation directions. A jogging angle may be set and the drive operated automatically for rotation in forward and/or reverse directions as a function of various operating conditions so that the needle is stopped in an optimum position for piercing a material.
Claims10
A sewing machine controlling apparatus comprising:
- sewing machine drive means for driving a sewing machine in forward and reverse directions;
- control means responsive to a plurality of signals, including a stitching start signal and a jogging signal, for controlling said sewing machine drive means;
- needle position detection means for detecting the needle position of said sewing machine;
- a jogging angle setting circuit for setting a jogging angle of said sewing machine;
- and
- jogging angle rotation means responsive to said setting circuit and said detection means for rotating said sewing machine needle forward by said jogging angle set by said jogging angle setting circuit in response to said jogging signal received by said control means.
A sewing machine controlling method comprising the steps of:
- storing a set jogging angle;
- determining whether or not a jogging signal has been generated;
- rotating said sewing machine needle in a first rotational direction by said set jogging angle in response to a determination that said jogging signal has been generated;
- providing a stitching start signal;
- and
- rotating said sewing machine in a second rotational direction, opposite to said first direction, by said jogging angle and subsequently rotating said sewing machine needle in said first rotational direction.
A sewing machine controlling apparatus for controlling the stitching of a material comprising:
- reversible sewing machine drive means for driving a sewing machine in forward and reverse directions and for moving a needle at least between UP and DOWN positions;
- thread trimming means for providing a thread trimming operation;
- control means for controlling said sewing machine drive means and said thread trimming operation;
- needle position detection means for detecting the needle position of said sewing machine;
- jogging angle setting means for setting a jogging angle of said sewing machine;
- and
- means for operating said sewing machine in a sequence comprising forming at least one stitch in the material, operating said thread trimming means, stopping at a needle UP position, rotating said sewing machine needle forward by the jogging angle set by said jogging angle setting means, and stopping the machine needle immediately before the material to be stitched.
Dependencies are inferred from the claim text.