Brother T-8720C Manuals

Table of Contents

• • 3

    Safety Instructions
  • 4

    Notes On Safety
  • 5

    Maintenance and Inspection
  • 6

    Warning Labels
  • 9

    Table of Contents

• 10

  1 Names of Major Parts

• 11

  2 Machine Specifications

• 12

  3 Table and Motor

• 13

  4 Installation

  • 14

    Installation
  • 19

    Cotton Stand
  • 20

    Lubrication
  • 22

    Checking the Machine Pulley Rotating Direction
  • 22

    Alarm Display (Semi Dry Type)

• 23

  5 Preparation before Sewing

  • 23

    Installing the Needle
  • 24

    Removing the Bobbin
  • 25

    Winding the Lower Thread
  • 26

    Installing the Bobbin
  • 28

    Threading the Upper Thread
  • 30

    Adjusting the Stitch Length
  • 30

    Using the Knee Lifter
  • 31

    Corner Sewing Method (T-8450C, 8750C)
    • 31

      To Stop the Needle Bars (Right and Left)
    • 31

      Number of Stitches: Quick-Reference Guide

• 32

  6 Sewing

  • 32

    Backtacking
  • 33

    Sewing Condensed Stitches

• 34

  7 Thread Tension

  • 34

    Adjusting the Thread Tension
  • 35

    Adjusting the Presser Foot Pressure
  • 36

    Adjusting the Presser Foot Floating Amount (Minute Lifting Amount)
  • 37

    Adjusting the Thread Take-Up Amount

• 38

  8 Cleaning

  • 38

    Daily Cleaning Procedures
  • 39

    Lubricating Via the Oil Cover (Every 6 Months)
  • 39

    Draining Lubricating Oil
  • 40

    Applying Grease - When the GREASE Indicator Illuminates (Semi Dry Type)
  • 42

    Resetting the Cumulative Operating Time

• 43

  9 Adjusting the Rotary Hook Lubrication Amount

• 44

  10 Standard Adjustment

  • 44

    Thread Take-Up Amount for Thread Take-Up Spring
  • 45

    Thread Take-Up Spring Tension
  • 46

    Clearance Between Rotary Hook and Needle Plate
  • 47

    Clearance Between Rotary Hook and Opener
  • 47

    Presser Foot Height
  • 48

    Needle and Rotary Hook Timing
  • 50

    Installing the Feed Dog
  • 51

    Feed Dog Position
  • 52

    Feed Dog Height
  • 53

    Feed Dog Angle

• 54

  11 Troubleshooting

  • 58

    Instruction Manual