Sewing machine controller

A control device and sewing machine technology, applied in the direction of sewing machine control devices, sewing machine components, program-controlled sewing machines, etc., can solve problems such as troublesome, difficult, and sewing objects

Inactive Publication Date: 2000-05-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] But when motor 7 breaks down for some reason, when using other motors 7, in order to simplify the adjustment process, there is a reference point of rotation position on the sewing machine side pulley 19, because the sewing machine side pulley 19 is connected to the motor shaft by the timing belt 17 11 connection, so if the reference point of the pulley 15 on the motor side deviates, then as Figure 7 As shown, the sawtooth wave output waveform of the encoder 7 becomes a solid line and a dotted line, and the upper position angle changes from Ua to Ui, which causes a large error in the detection of the upper position of the sewing machine needle 5.
Therefore, there is a problem that if the sewing machine is driven according to such an error, it may be difficult to take out the sewing object from the sewing machine needle 5.
[0012] In addition, when the control unit 40 fails, if the control unit 40 is replaced, only the control unit 40 stores the upper position angle of the sewing machine needle 5, so there is a problem that the upper position angle must be set again, which is very difficult. trouble

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Below, refer to figure 1 Example 1 of the present invention will be described. figure 1 It shows the overall block diagram of the sewing machine control unit. exist figure 1 The same reference numerals as in the prior art denote the same or corresponding parts, and description thereof will be omitted.

[0051] The control device of the sewing machine includes an operation unit 30 , a control unit 40 , and an encoder control unit 180 . The operation unit 30 includes an instruction memory 131 , a read switch 136 and a write switch 138 composed of electrically erasable nonvolatile storage elements.

[0052] A backup battery 101 is set in the control unit 40, and the encoder control unit 180 includes a voltage detection unit 181 for detecting whether the power supply voltage is supplied by the control unit 40, an encoder memory 183 composed of electrically erasable non-volatile storage elements, An encoder CPU 185 that controls the encoder 9 and a capacitor 187 for at...

Embodiment 2

[0058] Below, refer to image 3 Other embodiments of the present invention will be described. In this embodiment, the attenuation of the voltage value of the power supply of the control unit 40 is used to detect the replacement of the motor, and then, for example, a predetermined angle of the sewing machine needle 5 is set. For example, the identification number of the motor 7 is input into an input device not shown at the time of shipment, and the identification number of the motor 7 is written into the encoder memory 183 of the motor 7 using this identification number.

[0059] Utilize power supply to turn on (ON) from disconnection (OFF), then the CPU53 of control unit reads identification number from encoder memory 183, and this number is sent in the control unit 40, and is stored in the control memory 55 ( Step 301).

[0060] Then, for some reason motor 7 breaks down, then judge whether the power supply of control unit 40 changes disconnection (OFF) (step 303) from conn...

Embodiment 3

[0063] Below, refer to Figure 4 Other embodiments of the present invention will be described. In this embodiment, for example, the voltage attenuation of the encoder control unit 180 is used to detect the replacement of the motor, and then the predetermined angle of the sewing machine needle is set.

[0064] The voltage detection unit 181 judges whether the power supply voltage value of the encoder control unit 180 has attenuated (step S401), and if it is normal, this process ends. On the other hand, in the case of attenuation, the encoder CPU 185 stores the fact that the power supply voltage value of the encoder control unit 180 is abnormal in the encoder memory 183 (step 403), and the voltage detection unit 181 judges whether the power supply voltage value is attenuated or not. becomes (OFF), and the power supply voltage value returns to normal (ON) (step 405), and if not, this process ends.

[0065] On the other hand, if recovery, then the encoder CPU185 transmits the po...

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PUM

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Abstract

A sewing machine controller is provided with a motor for driving a main shaft of a head section of a sewing machine, detecting section for detecting rotational angle of the motor, a control section which controls the motor and, at the same time, fetches the signal of the detecting section, and an operating section which instructs the operations of the sewing machine. The controller is also provided with a designating means which designates a prescribed position to the needle of the sewing machine in the ascending and descending processes of the needle in the control section or in the operating section. The controller is provided with first storing section, which can store and read out the value designated by means of the designating means in the control section, and further provided with second storing section in the detecting section or in the operating section.

Description

technical field [0001] The present invention relates to a control device for a sewing machine, which uses an encoder for detecting the rotation angle of a motor driving a needle of the sewing machine, for eliminating abnormalities generated when the motor is replaced. Background technique [0002] Below, refer to Figure 5 to Figure 7 A conventional sewing machine will be described. exist Figure 5 and Figure 6 Among them, the sewing machine includes: a drive unit 1 having a motor 7 that moves the sewing machine needle 5 up and down, an operation unit 30 that provides control instructions and the like to this drive unit 1, and drives and controls the drive unit 1 according to the instructions of the operation unit 30. The control unit 40. [0003] The driving unit 1 engages the solenoid 3 for driving the sewing machine head with the motor side pulley 19 connected to the shaft of the motor 7 and the sewing machine side pulley 15 connected to the shaft 11 of the sewing mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B19/14D05B69/24D05B69/36
CPCD05B19/14D05B69/36D05B69/24
Inventor 西沢吉史
Owner MITSUBISHI ELECTRIC CORP
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