JPS57716A - Controller of sewing machine - Google Patents
Controller of sewing machineInfo
- Publication number
- JPS57716A JPS57716A JP7505980A JP7505980A JPS57716A JP S57716 A JPS57716 A JP S57716A JP 7505980 A JP7505980 A JP 7505980A JP 7505980 A JP7505980 A JP 7505980A JP S57716 A JPS57716 A JP S57716A
- Authority
- JP
- Japan
- Prior art keywords
- turned
- electromagnet
- pulse
- period
- switch
- 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 Position Or Direction (AREA)
Abstract
PURPOSE: To simplify a control circuit by eliminating the need for a timer which controls initial energizing by making the 1st pulse in the start of oscillation longer than the following switch pulse and by energizing an electromagnet with the 1st pulse.
CONSTITUTION: An oscillator which turns on a transistor TR11 consists of a reference voltage circuit composed of a comparator 10 and resistances R1WR3, and a CR integral network composed of a resistance R4 and a capacitor C1. While the set leg of the oscillator is lowered, a switch S3 is turned on; in a period Δt8 right after that, the TR11 is turned on to energize an electromagnet M.K and in the following period Δt9, the TR11 is turned off. In a period Δt10, the TR11 is turned on repeatedly to energize the electromagnet M.K intermittently, holding the set leg at an elevation position. Then, when the switch S3 is turned off, a gate 12 is set to logic 0 and the output of a comparator is held at 0V to turn off the TR11, demagnetizing the electromagnet M.K. Thus, the need for a timer for cntrol over initial energizing is eliminated.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7505980A JPS57716A (en) | 1980-06-04 | 1980-06-04 | Controller of sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7505980A JPS57716A (en) | 1980-06-04 | 1980-06-04 | Controller of sewing machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57716A true JPS57716A (en) | 1982-01-05 |
Family
ID=13565247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7505980A Pending JPS57716A (en) | 1980-06-04 | 1980-06-04 | Controller of sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57716A (en) |
-
1980
- 1980-06-04 JP JP7505980A patent/JPS57716A/en active Pending
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