Brother DT3-B291, Инструкция по эксплуатации, Страница: 16 / 108

CONTENTS
1. NAMES OF MAJOR PARTS ................................... 1
2. MACHINE SPECIFICATIONS .................................. 3
3. OPTIONAL PARTS .................................................. 5
4. MOTOR .................................................................... 7
5. INSTALLATION ....................................................... 9
5-1. Processing the work table ............................... 10
5-2. Installing the machine head .......................... 11
5-3. Installing the belt ............................................ 12
5-4. Installing the belt cover ................................... 13
5-5. Installing thread guide U ............................... 14
5-6. Installing the presser lifter pedal .................... 14
5-7. Ground wire connections ............................... 15
5-8. Installing the cotton stand ............................. 15
5-9. Lubrication ...................................................... 16
5-10. Checking the machine pulley
rotating direction ............................................ 19
6. PREPARATION BEFORE SEWING .......................... 20
6-1. Needles ............................................................ 20
6-2. Installing the needle ........................................ 21
6-3. Threading ........................................................ 22
6-4. Using the needle thread cooler ...................... 25
6-5. Adjusting the stitch length ............................. 26
7. SEWING .................................................................. 28
7-1. Sewing speed ................................................. 29
7-2. Sewing .............................................................. 29
8. ADJUSTING THE THREAD TENSION ................... 31
8-1. Thread tension ................................................. 31
8-2. Adjusting the presser foot pressure ............. 33
9. CLEANING ............................................................... 34
9-1. Daily cleaning procedures ............................. 35
9-2. Changing the lubrication oil
(every three months) ......................................
37
9-3. Applying grease (every three months) ......... 37
9-4. Replacing the oil filter (every six months) .... 38
10. STANDARD ADJUSTMENTS ............................... 39
10-1. Removing parts which need to be
removed before adjustment .......................... 40
10-1-1. Face plate .......................................... 40
10-1-2. Presser foot ........................................ 41
10-1-3. Needle plate ...................................... 42
10-1-4. Feed dog ............................................ 43
10-2. Adjustments ..................................................... 44
10-2-1. Needle thread take-up position ........ 44
10-2-2. Thread guide position ...................... 45
10-2-3. Middle thread guide position ........... 45
10-2-4. Looper thread take-up position ........ 46
10-2-5. Looper thread guide position
adjustment ........................................ 47
10-2-6. Adjusting the height of the
needle bar .......................................... 48
10-2-7. Adjusting the ratio between the
lower feed amount and needle
feed amount ...................................... 49
10-2-8. Needle bar rocker crank position .... 50
10-2-9. Needle bar forward/back
position ............................................. 51
10-2-10. Adjusting the needle and looper
clearance ............................................ 52
10-2-11. Adjusting the needle and looper
timing ................................................. 55
10-2-12. Adjusting the needle and looper
positions ............................................ 57
10-2-13. Adjusting the needle guard
position ............................................. 59
10-2-14. Adjusting the retainer position ........ 60
10-2-15. Adjusting the feed dog position ...... 63
10-2-16. Adjusting the needle plate
position ............................................. 67
10-2-17. Adjusting the presser foot
mechanism ........................................ 69
11. INSTALLING COMMERCIALLY-AVAILABLE
PARTS ................................................................... 71
11-1. Synchronizer (Option) ................................... 72
11-2. Lapper .............................................................. 74
11-3. Needle plate ..................................................... 75
11-4. Puller and other parts ....................................
75
12. TROUBLESHOOTING ........................................... 76