Method and device for regulating material transport in a sewing or embroidery machine
AssigneeFritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik
InventorManfred Schweizer
Life of this patent
Estimating the term…
Abstract
A method and device for regulating the transport of material in a sewing or embroidery machine (1) that uses information from a position or movement sensor (33) located underneath the throat plate (21). The controls for the sewing machine (1) calculate deviations of the actual feeding increments of the article to be sewn from the corresponding target values from the periodically read sensor signals. With this information, the feeding increments are regulated in such a way that the deviations are cancelled out by averaging.
Claims12
Method for regulating the transport of material in a sewing or embroidery machine (1), comprising providing at least one material transport device (27) for transporting an article to be sewn (28) in at least one direction for, in each case, one target increment (ΔyA;
- ΔxA), whereby the target increment (ΔyA;
- ΔxA) can be adjusted or calculated by controls (13) and influences at least one feeding increment (ΔyT;
- ΔxT) of the material transport device (27) for transporting the article to be sewn (28), detecting at least one actual increment (ΔyB;
- ΔxB) of movement of the article to be sewn by at least one sensor 32, and regulating the feeding increment (ΔyT;
- ΔxT) with the controls (13) depending on the actual increments (ΔyB;
- ΔxB) detected by the sensor (32) so that the deviations of the actual increments (ΔyB;
- ΔxB) from the respective target increments (ΔyA;
- ΔxA) are compensated for by averaging over one or several consecutive sewing steps.
Method for regulating the transport of material in a sewing or embroidery machine (1), comprising providing at least one material transport device (27) for transporting an article to be sewn (28) in a sewing direction (y) for, in each case, a first target increment (ΔyA) and in a cross direction (x) for, in each case, a second target increment (ΔxA), and adjusting and/or calculating the first target increment (ΔyA) and the second target increment (ΔxA) by the controls (13) to influence a first feeding increment (ΔyT) and a second feeding increment (ΔxT) of the material transport device (27) for transporting the article to be sewn (28) in the sewing direction (y) and in the cross direction (x), detecting the first actual increment (ΔyB) and the second actual increment (ΔxB) by sensors (32), and regulating the first feeding increment (ΔyT) and the second feeding increment (ΔxT) with the controls (13) depending on the first actual increment (ΔyB) and the second actual increment (ΔxB) so that deviations of the first actual increments (ΔyB) and the second actual increments (ΔxB) from the respective target increments (ΔyA;
- ΔxA) are compensated for by averaging over one or more consecutive sewing steps or feeding cycles.
A device for regulating the transport of material in a sewing or embroidery machine (1), comprising:
- at least one material transport device (27) for transporting an article to be sewn (28) in at least one direction for a target increment (ΔyA;
- ΔxA);
- controls (13) for adjusting or calculating the target increment (ΔyA;
- ΔxA) and influencing at least one feeding increment (ΔyT;
- ΔxT) of the material transport device (27) for transporting the article to be sewn (28);
- at least one sensor (32) capable of detecting a measurement category in at least one spatial dimension for detecting at least one actual increment (ΔyB;
- ΔxB);
- and
- a sensor opening (33) embedded in an area of a needle opening (23) in a throat plate (21) of the sewing or embroidery machine (1), the sensor opening (33) being covered by a protective window (36), and at least one of the sensor (32) and a device for transferring a signal to the sensor (32) is located at least partially underneath the protective window (36);
- wherein the controls (13) are configured to regulate the feeding increment (ΔyT;
- ΔxT) depending on the actual increments (ΔyB;
- ΔxB) detected by the sensor (32) so that the deviations of the actual increments (ΔyB;
- ΔxB) from the respective target increments (ΔyA;
- ΔxA) are compensated for by averaging over one or several consecutive sewing steps.
An apparatus for regulating the transport of material in a sewing or embroidery machine over a plurality of feeding cycles, the apparatus comprising:
- a material transport device for transporting an article by moving the article at least one feeding increment during the plurality of feeding cycles;
- at least one sensor for detecting at least one actual increment of the article and producing a signal corresponding to the at least one actual increment;
- and
- controls for adjusting or calculating a target increment, and for receiving the signal corresponding to the at least one actual increment and automatically adjusting the at least one feeding increment to correspond to the at least one actual increment, wherein an accumulated value of the at least one actual increment coincides with an accumulated value of the at least one target increment over one or more of the feeding cycles.
Dependencies are inferred from the claim text.