JPS5558793A - Electromechanical pattern sewing machine - Google Patents
Electromechanical pattern sewing machineInfo
- Publication number
- JPS5558793A JPS5558793A JP13125778A JP13125778A JPS5558793A JP S5558793 A JPS5558793 A JP S5558793A JP 13125778 A JP13125778 A JP 13125778A JP 13125778 A JP13125778 A JP 13125778A JP S5558793 A JPS5558793 A JP S5558793A
- Authority
- JP
- Japan
- Prior art keywords
- seam
- pulse motor
- pulse
- driving
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To sufficiently satisfy torque, high-speed following ability, and position accuracy which are required for driving a seam-forming device of a sewing machine by making the excitation-phase switching period of a pulse motor variable. CONSTITUTION:The number of steps of a pulse motor which is required for the movement of the pulse motor driving a seam-forming device system 4 is output from a seam-information memory device 2. A control circuit 7 determines the method of switching the driving cycle so as to drive the pulse motor in an optimal manner depending on the numbe of moving steps and asigns the pulse number to individual circuits 5a-5d. The circuits 5a-5b output the specified pulse number at every oscillating period, which is specified for each circuit, sequentially from the circuit a, and stops the oscillation. A driver 3 that receives the pulse train has a logic constitution which generates an exciting signal for the pulse motor, and shifts the exciting phase one by one. The signal from a needle-position sensor 6 accesses the seam-information memory device 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13125778A JPS5558793A (en) | 1978-10-24 | 1978-10-24 | Electromechanical pattern sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13125778A JPS5558793A (en) | 1978-10-24 | 1978-10-24 | Electromechanical pattern sewing machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5558793A true JPS5558793A (en) | 1980-05-01 |
Family
ID=15053679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13125778A Pending JPS5558793A (en) | 1978-10-24 | 1978-10-24 | Electromechanical pattern sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558793A (en) |
-
1978
- 1978-10-24 JP JP13125778A patent/JPS5558793A/en active Pending
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