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公开(公告)号：EP0028138B1
公开(公告)日：1985-10-09
申请号：EP80303767.0
申请日：1980-10-23
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
CPC分类号： H02P29/0016 , G01D5/34792 , H02P23/22 , Y10S388/912 , Y10S388/921
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公开(公告)号：EP0045649B1
公开(公告)日：1985-01-30
申请号：EP81303532.6
申请日：1981-07-31
发明人： Shinozaki, Nozomu , Neki, Shigeo , Dohi, Takashi
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公开(公告)号：EP0028139A1
公开(公告)日：1981-05-06
申请号：EP80303768.8
申请日：1980-10-23
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
IPC分类号： G05D13/62
CPC分类号： H02P29/0016 , H02P23/22
摘要： A digital speed control system for a sewing machine comprises a digital speed setting device (5) which responds to manual depression of a foot pedal by generating a digital position signal. A variable frequency divider (4) divides the frequency of speed related pulses so that its output frequency is an integral submultiple of the input frequency, which is variable as a function of the digital position signal. A period detector (6) senses the interval between pulses that occur successively at the output of the frequency divider and generates a binary data representing the sensed interval. The interval representing data is translated into a second period data in an arithmetic unit (8') according to a predetermined transfer function. The arithmetic unit provides correction of the most recently sensed pulse interval according to the direction and amount of the deviation of the most recent pulse interval with respect to the preceding pulse interval, whereby the second period data is accordingly modified by an amount proportional to the rate of sewing speed variation. A pulse generator (9) translates the second period data into a pulse for activating a magnetic clutch or a magnetic brake depending on a sign of the second period data to accelerate or decelerate the sewing machine.
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公开(公告)号：EP0028139B1
公开(公告)日：1986-03-05
申请号：EP80303768.8
申请日：1980-10-23
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
IPC分类号： G05D13/62
CPC分类号： H02P29/0016 , H02P23/22
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5.发明公开Sewing machine having a memory for generating a speed control signal in response to operating conditions 失效缝纫机具有存储器，用于响应于操作条件产生的速度控制信号。
公开(公告)号：EP0067072A2
公开(公告)日：1982-12-15
申请号：EP82302989.7
申请日：1982-06-09
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
CPC分类号： D05B69/18 , H02P29/0016
摘要： Disclosed is a sewing machine having a tachogenerator (2) for generating pulses at a frequency proportional to the speed of the sewing machine and a position detector (50, 52) for detecting the position of a foot pedal (51). A condition detector (54) is provided for detecting the operating conditions of the sewing machine in which it its to be subsequently operated and generating thereform a corresponding condition indicating signal and a manually adjustable binary code generator (53) for generating a speed indicating binary code in response to the condition indicating signal. - Further included is a digital memory (55, 56, ROM o -ROM n ) responsive to the position indicating signal and the speed indicating binary code for generating a digital speed control signal. The pulses generated by the tachogenerator is processed in accordance with the speed control signal to control the amount of motive power transmitted from a motor to the sewing machine.
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公开(公告)号：EP0045484A1
公开(公告)日：1982-02-10
申请号：EP81105973.2
申请日：1981-07-29
发明人： Shinozaki, Nozomu , Neki, Shigeo , Dohi, Takashi
IPC分类号： D05B69/22
CPC分类号： D05B69/26
摘要： An electric sewing machine driving apparatus includes a clutch coil (3) of an electromagnetic clutch for transmitting a driving motor torque to a sewing machine, a brake coil (4) of an electromagnetic brake for braking the sewing machine, a needle position signal generator (13) for generating a signal indicative of a position where a needle of the sewing machine is to stop, a DC power supply (1, 2, D, - D 4 , C,) for energizing the clutch coil and the brake coil, voltage generating means (7, Q 5 , D 11 ) for generating a DC voltage higher than the supply voltage of the DC power supply and a capacitor (C 2 ) disposed to be charged by the voltage generated by the voltage generating means, whereby an electric charge stored in the capacitor (C 2 ) discharges through the brake coil (4) in response to the needle position signal from the needle position signal generator (13), thereby improving the needle positioning accuracy of the sewing machine.
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8.发明公开Circuit arrangement for controlling sewing machine speed and for positioning sewing needle 失效用于控制缝纫机速度和定位缝纫针的电路布置
公开(公告)号：EP0104913A3
公开(公告)日：1985-05-15
申请号：EP83305700
申请日：1983-09-23
IPC分类号： G05D13/62
CPC分类号： H02P29/0016
摘要： @ The circuit arrangement comprises a speed control system responsive to a speed signal indicative of the rotational speed of an arm shaft driving the sewing needle in the same manner as in known arrangements. Although the circuit arrangement operates in the same manner as in the known arrangement when a foot pedal is other than a neutral position, once the foot pedal is released to be in the neutral position, particularly provided speed setting data is used where the speed setting data value decreases as the J rotational angle of the arm shaft increases. With this arrangement the sewing machine is capable of operating at a speed higher than conventional one during needle positioning with the speed being sufficiently reduced just before the needle is stopped. Thus a time length requried for the last stitch has been remarkably reduced, providing efficient sewing work without deteriorating positioning accuracy. The sewing machine speed damping curve slope may be manually selected so that a user can set a desired positioning time. Furtheromore, by selecting a needle position signal, the needle may be stopped at either at an uppermost position or a lowermost position.
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9.发明公开Sewing machine having a memory for generating a speed control signal in response to operating conditions 失效具有响应操作条件产生速度控制信号的存储器的缝纫机
公开(公告)号：EP0067072A3
公开(公告)日：1983-04-13
申请号：EP82302989
申请日：1982-06-09
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
CPC分类号： D05B69/18 , H02P29/0016
摘要： Disclosed is a sewing machine having a tachogenerator (2) for generating pulses at a frequency proportional to the speed of the sewing machine and a position detector (50, 52) for detecting the position of a foot pedal (51). A condition detector (54) is provided for detecting the operating conditions of the sewing machine in which it its to be subsequently operated and generating thereform a corresponding condition indicating signal and a manually adjustable binary code generator (53) for generating a speed indicating binary code in response to the condition indicating signal. - Further included is a digital memory (55, 56, ROM o -ROM n ) responsive to the position indicating signal and the speed indicating binary code for generating a digital speed control signal. The pulses generated by the tachogenerator is processed in accordance with the speed control signal to control the amount of motive power transmitted from a motor to the sewing machine.
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公开(公告)号：EP0068713A2
公开(公告)日：1983-01-05
申请号：EP82303107.5
申请日：1982-06-15
发明人： Neki, Shigeo , Shinozaki, Nozomu , Dohi, Takashi
CPC分类号： D05B69/18 , H02P29/0016
摘要： A sewing machine comprises a pedal position detector (51, 50) for detecting the position of the manually operated foot pedal of the machine and generating therefrom a pedal position indicating digital signal comprising a set of a predetermined number of binary digits. The sets of binary digits are organized by a read only memory (52) and a binary-to-decimal converter (53) into a plurality of command signals each comprising a plurality of sets of binary digits corresponding to adjacent positions of the pedal for indicating a specified operating condition of the sewing machine. The sewing machine is operated in response to the command signal.
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