BROTHER SUPER GALAXIE 3100D free download

File name computer_sewing_©_.pdf

SERVICE MANUAL FOR COMPUTERIZED SEWING MACHINE ULT2003D SUPER GALAXIE 3100D ULT2001N ULT2001C M3000N M3000C 3. 2003.  This service manual has been compiled for explaining repair procedures of this MODEL. This was produced based on up-to-date product specifications at the time of issue, but there may have been changes of specifications for the purpose of improvements. Contact manufacturer or local sales company for information concerning such changes. Brother Industries, Ltd. Nagoya, Japan  I . II . III . IV .  PRINCIPAL MECHANISMS... 1 DISASSEMBLING AND REASSEMBLING THE SEWING MACHINE ... 8 HOW TO ADJUST MECHANICAL ELEMENTS... 24 HOW TO ADJUST ELECTRONIC ELEMENTS ... 58  1. 2. 3. 4. Always use rubber gloves when handling printed circuit boards and never touch the metal portion of a printed circuit board with bare hands. Keep your body earthed in order to avoid generating static electricity. Pack printed circuit boards in aluminum foil and avoid subjecting them to any form of impact during storage or transportation. Do not touch or damage the metal portion of a printed circuit board with a screwdriver or any other tool while making repairs or the like. I. 1. 2. 3. 4. 5. 6. 7. 8.   MECHANICAL CHART ... 2 POWER TRANSMISSION CHART ... 3 ELECTRONIC PARTS ARRANGEMENT CHART... 4 CONTROL SYSTEM BLOCK DIAGRAM ... 5 MAIN MOTOR CONTROL... 5 PATTERN GENERATOR ... 6 AUTOMATIC THREAD TENSION... 6 OTHER ELECTRONIC COMPONENT FUNCTIONS ... 7 -1- 1. MECHANICAL CHART EMBROIDERY UNIT MECHANISM -2- 2. (A) POWER TRANSMISSION CHART Generating mechanism of needle bar, thread take-up lever and zigzag movements (B) Mechanism of feed dog and rotary hook movement -3- 3. ELECTRONIC PARTS ARRANGEMENT CHART -4- 4. CONTROL SYSTEM BLOCK DIAGRAM 5. MAIN MOTOR CONTROL The main motor for the sewing machine is required to smoothly change from low speed to high speed without any fluctuations due to load or temperature changes. To fully comply with this requirement this machine adopts Pulse width modulation (PWM) control using Field Effect Transistor (FET). -5- 6. PATTERN GENERATOR For conventional sewing machines, the pattern was generated by rocking the needle bar and the feed regulator by means of a pattern cam onto which the pattern data had been mechanically engrav