| 摘要 |
An embroidery machine for embroidering a predetermined pattern on fabric includes a sewing head, a cloth frame for supporting fabric to be embroidered with the predetermined pattern for movement relative to the sewing head, first and second drives for moving the cloth frame segmentally in first and second coordinate directions, respectively, and a sewing pattern memory for storing a plurality of signals each of which is representative of an incremental coordinatal displacement of the cloth frame corresponding to individual segments of the predetermined pattern to be embroidered. The embroidery machine further includes a control responsive to the plurality of signals from the sewing pattern memory for actuating the first and second drives and a scaler for modifying the size of the predetermined pattern by modifying the number of segments occasioned in the predetermined pattern by each of the plurality of signals. A smoothing circuit is provided for modifying the segmental displacement of the cloth frame in accordance with the scaler to prevent the exaggeration of jagged edges of the design upon a change in the size of the predetermined pattern. A centering control is also provided for driving the drives to effect movement of the sewing head relative to the fabric to be embroidered around the periphery of the predetermined pattern subsequent to the fabric in the cloth frame being manually centered under the sewing head with respect to the desired central position of the predetermined pattern to be embroidered.
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