摘要:
A rotor shaft of a stepping motor is elastically held via cushions with respect to a housing of machinery, thereby to reduce disorders or noises to be caused in the stepping motor and exactly position an object to be adjusted.
摘要:
Intercharacter data for use in an electronic sewing machine is prepared by the steps of constituting each intercharacter control data with a first stitch control data group for determining relative position between a fabric and a character, a second stitch control data group utilized to form the character, and a third stitch control data group for determining a spacing between adjacent two characters; drawing a top segment .alpha. and a bottom segment .beta. respectively passing through top and bottom portions of the characters in parallel with the fabric feeding direction; and drawing a front segment X and a rear segment Y respectively passing through mostly projecting portions of the character on the front and rear sides thereof with respect to the fabric feeding direction in perpendicularly to the segments .alpha. and .beta.. Then the needle position of a first stitch point effected by the first stitch control data group comes to a position near the segment X and the area (Sh') of a front blank portion bounded by a segment X.sub.0 ' passing through the first stitch point in parallel with the segment X, the contour of a character to be stitched next, and the segments .alpha. and .beta. is substantially the same between any two adjacent characters. Moreover, the area (St') of a rear blank portion bounded by a segment Y.sub.0 ' passing through a last stitch point provided by the third stitch control data group in parallel with the segment Y, the contour of a previously stitched character and the segments .alpha. and .beta. are also substantially the same between any two adjacent characters.
摘要:
A specific pattern for adjusting a fabric feeding amount in an electronic sewing machine with a storage for storing stitch control data for a plurality of different patterns. The specific pattern includes a 1st stitching group stored in the sewing machine and used for stitching the whole pattern in a reverse feed, a 2nd stitching group which coincide with the first one when a feed reference point is adjusted properly, and at least a 3rd stitching group which is stitched by a plurality of forward feeds and rearward feeds and is positioned in opposition to the 1st stitching group relative to a middle basic line, and gives to the 2nd stitching group accumulative errors of the forward feed and the rearward feed, so that a balance between the feeding amounts in a forward and a rearward directions of stitching is conformed.
摘要:
This invention relates to a computer controlled sewing machine, and more particularly to such a sewing machine which is incorporated therein with a plurality of feed adjusting switches for giving information to a micro-computer housed in the sewing machine, in order to correct irregularities of forward and backward feed amounts.
摘要:
During stitching a pattern, there is often issued a designation to change the pattern under forming to the other. In such a case total load on a fabric feed control motor and a needle amplitude control motor is temporarily increased. A microcomputer which controls driving of these motors, discriminates the new designation and rotating phase of the sewing machine and drives the fabric feed control motor by means of specific data by mean value of the maximum and the minimum fabric feed control data, instead of the fabric feed control data which is first read out next to said designation. The control amount brought about by difference between said specific data and the fabric feed control data read out prior to said designation which controls as the final fabric feed before said designation, is caused to prevent the maximum available to the sewing machine so that the total load applied to the two motors are reduced when the maximum possible control is given to the needle amplitude control motor in succession to the load on the fabric feed control motor.
摘要:
In a stitch control process of the sewing machine which employs a microcomputer with an electronic memory storing stitch control signals and a needle position control motor and a fabric feed control motor, the microcomputer controls the needle position and the fabric feed control motors at certain rotation phases of the sewing machine. The microcomputer temporarily holds, during the operation of the sewing machine, the needle and feed control data and the feed control amount based on the feed control data which are read out in each phase and calculates the addition of the feed control amount and the needle control amount based on the needle control data which is read out at the following phase. If the calculating result is more than a predetermined value, the microcomputer employs the needle and feed control data read out at the preceding phase instead of the needle and feed control data read out at the following phase to control the feed and needle control motors with a total value of the needle and feed control amounts which is less than the predetermined value.
摘要:
A method is disclosed for modifying a specific stitch or stitches of a given stitch pattern while the other parts of the pattern remain subject to the standard setting specific to the pattern.
摘要:
With respect to a printer which carries out printing on a paper by impact of a wire of a printing head repeating movement, a sound proof device of a printer prevents the paper from transmitting fluttering under amplification to the paper sent to an entrance of the printer, and does not cause inconvenience to sending of the paper.
摘要:
An automatic embroidery frame drive device used in an automatic embroidery sewing machine which produces embroidery stitches on a fabric held by an embroidery frame comprising a 1st, a 2nd and a 3rd electromagnetic actuator which is disposed at a stationary side of the embroidery frame drive device and a plurality of wires for transmitting movement of said electromagnetic actuators, so that the embroidery frame is controlled in X and Y directions.
摘要:
An impact type color printer is provided a control circuit which produces a random digit signal each time the printer is connected to a power supply, according to which random digit signal a platen is rotated so that one of plural impact sections axially arranged in each ink saturated member of different color is selected at random and positioned just opposite to a printing head to be subjected to impact thereby for printing operation.