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4. MAIN MOTOR CONTROLLED BY MICRO-COMPUTER (B341
⋅
B349
⋅
B351
⋅
B352)
The sewing machine’s main motor requires a constant rotation at all speeds regardless of the changes in the
load, power supply or temperature. In addition, to make the machine easy to use, it should take into account
that the machine should run slowly when it starts and the needle should be in the up position when it stops.
To execute these requirements, the main motors of these sewing machines are controlled by a micro-
computer.
<
MOTOR CONTROL BLOCK CHART
>
Drive circuit
Speed sensor
SS Switch
Reverse sw
Bobbin winder
sw
CPU
Reset circuit
Speed volume
Foot controller
Motor
NP sensor
30pins
Содержание BL6200
Страница 1: ...4 1998 ...
Страница 24: ... 22 1 ADJUSTMENT OF EACH CONTROL UNIT 4 STEP BH MODEL B346 ...
Страница 25: ... 23 1 ADJUSTMENT OF EACH CONTROL UNIT 1 STEP BH MODEL B338 B341 B347 B348 B349 B351 B352 ...
Страница 63: ... 61 3 LEAD WIRES ARRANGEMENT B338 B346 B347 B348 B341 B349 B351 B352 ...
Страница 64: ... 62 LCD UNIT 1 LINE LCD TYPE ...
Страница 65: ... 63 DISPLAY SYSTEM LCD control PCB LCD module 4 LINE LCD TYPE ...
Страница 66: ... 64 MOTOR CONTROL UNIT 230V 120V MODE SWITCH UNIT 1 LINE LCD TYPE 4 LINE LCD TYPE ...
Страница 68: ... 66 BL6200 B338 BL6700 B341 H7110109 ...