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    • 81. 发明专利
    • SYNCHRONOUS CONTROL METHOD OF SEWING MACHINE
    • JPH07657A
    • 1995-01-06
    • JP17203993
    • 1993-06-21
    • TOKAI IND SEWING MACHINES G KK
    • TAJIMA IKUOICHIKAWA WATARUOSHIE NAOMASAFUJIURA MITSUHIROUENISHI KOJI
    • B23Q15/00D05B25/00D05B69/00D05C5/04
    • PURPOSE:To remove the positional deviation between respective driving mechanisms changed according to embroidery speed, in an embroidery sewing machine having a plurality of driving mechanisms driven by independent driving sources, and hold the positional relation between respective driving mechanisms constant. CONSTITUTION:An embroidery sewing machine has a first driving means formed of a main spindle motor 4 for simultaneously rotating and driving a hook mechanism 91, a needle bar mechanism 6, and a needle thread take-up mechanism 51; and a second driving means formed of a frame driving means 8 including an X, Y-axial servo motor for driving an embroidery frame mechanism 82 in X, Y-axial directions synchronously with the operating position of the needle bar mechanism 6. The main spindle motor 4 has a first rotating position sensor 41, and the X, Y-axial servo motor has a second rotating position sensor. At embroidery work, a correcting deviation is generated according to the operating speed of the main spindle motor 4, a prescribed position according to the detected position of the first rotating position sensor 41 is outputted as the command operating position of the frame driving means 8, and the frame driving means 8 is operated with a one obtained by correcting this position with the correcting deviation.
    • 83. 发明专利
    • CONTROL DEVICE OF INJECTION MOLDING MACHINE
    • JPH06344399A
    • 1994-12-20
    • JP16329293
    • 1993-06-08
    • S G KK
    • YUASA YASUHIROSUGIURA YOSHIYAOKUMURA MASAHIRO
    • B29C45/50B29C45/76B29C45/77
    • PURPOSE:To perform control according to an indicated speed pattern regardless of the response characteristics of an actuator controlling a hydraulic cylinder by correcting the indicated speed pattern at the time of injection molding on the basis of the deviation of the actual injection speed at the injection position of an injection cylinder and an indicated speed and injection acceleration. CONSTITUTION:The indicated speed pattern corresponding to the injection position of an injection cylinder is written in an indicated speed pattern memory means 11 and a speed pattern memory means 12. A speed calculation means 10 calculates an injection speed on the basis of the signal of the position detection means 8 of the injection cylinder and an acceleration calculation means 16 calculaters injection acceleration. A deviation calculation means 13 calculates the deviation of the calculated injection speed and the indicated speed at the corresponding position stored in the memory means 11 and a learning means 17 corrects the speed pattern stored in the memory means 12 from the injection acceleration and the speed deviation. A speed forming means 4 reads the corrected speed pattern to perform injection molding. The same control can be performed even at the time of dwelling control or weighing calculaters.
    • 85. 发明专利
    • INTERLOCK CONTROL SYSTEM
    • JPH06149332A
    • 1994-05-27
    • JP32138792
    • 1992-11-06
    • S G KK
    • YAMASHITA HIKARIFUNABIKI YOICHI
    • G05B9/02G05B19/19G05B19/4155G05D3/00G05B19/403
    • PURPOSE:To prevent the interference caused between the machines without using an interference preventing program by carrying out the interlock control after deciding the interference state between an action unable area and a mobile area based on the present position and an estimated position. CONSTITUTION:The position sensors 9 are connected to the rotary shafts of the servo motors 8 and detect the present positions respectively. The controllers 1 read the control programs of machines A and B out of each built-in memory and output the target position data PP on the motors 8 to the position command parts 2 to perform the positioning control. The position computing parts 6 convert the output of the sensors 9 into the present position data P1. The position estimating parts 11 estimate the machine positions to be set after a prescribed time based on the data P1. Then the area production parts 12 produce the area data AA and AB for the movements of both machines A and B between the present and estimated positions and output these data to an interlock control part 20. The part 20 supplies the area data AD through an area designating part 10 to decide the interference state among those areas AA, AB and AD and then carries out the avoidance processing against the interference if caused among these areas.
    • 89. 发明专利
    • FREQUENCY-VOLTAGE CONVERTER
    • JPH05136667A
    • 1993-06-01
    • JP32151791
    • 1991-11-11
    • S G KK
    • SAKAMOTO KAZUYAFUNATSU MITSUHIRO
    • H02P27/06H03K9/06
    • PURPOSE:To prevent the deterioration in the response by multiplying a coefficient corresponding to a pulse train frequency with an analog voltage from an FVD with a different time constant and adding the products. CONSTITUTION:The converter is provided with multipliers 3, 4, a conversion table 5 and an adder 6 to apply variable control to a time constant tauM of the FVC(frequency-voltage converter) between a time constant tauL of the FVC1 and a time constant tauH of the FVC2 in response to a frequency of an incremental pulse IP. The table 5 receives an output voltage VH0 of the FVC2 according to a linear function and outputs relevant coefficients KL, KH to the multipliers 3, 4. The multiplier 3 multiplies an output voltage VL0 of the FVC1 with the coefficient KL and outputs the result to the adder 6 as a voltage VL1, and the multiplier 4 multiplies an output voltage VH0 of the FVC2 with the coefficient KH and outputs the result to the adder 6 as a voltage VH1, and the adder 6 adds the output voltages VL1, VH1 and outputs an output voltage VM. Thus, even when the frequency of an input pulse train is subject to change, no effect of a ripple voltage is caused and the response is not deteriorated.
    • 90. 发明专利
    • POSITION SENSING DEVICE
    • JPH05133764A
    • 1993-05-28
    • JP32151691
    • 1991-11-11
    • S G KK
    • SAKAMOTO KAZUYAFUNATSU MITSUHIRO
    • G01B7/30G01B7/00G01D5/243G01D5/245
    • PURPOSE:To output the position data certainly without occurrence of data omission phenomena in sensing the moving position of a high-speed moving body. CONSTITUTION:An absolute position sensing means in phase shift system samples the change of magnetic resistance generated with movement of a moving body at certain periods according to the speed of a moving body in the form of change in the electric phase angle of output AC signals, and the values from sampling are outputted as the absolute position data of the moving body. A difference calculating means 22 calculates the difference between the previous value and current value of the absolute position data outputted at every sampling timing from the absolute position sensing means. A pulse generating means 26 subtracts the specific marginal time from the sampling period and produces evenly a certain number of pulses corresponding to the difference value within the time subtracted. A position data generating means 27 emits one by one the interpolating position data between the previous value and current value of the absolute position data in accordance with the input of pulses from the pulse generating means 26, and thus absolute position data with no omission is produced.