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Brother International T-8422C Instruction Manual - English - Page 11

MACHINE SPECIFICATIONS, T-8421C, 8752C, Lifting lever - 405

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T-8421C Max. sewing speed Start backtacking and continuous backtacking speed End backtacking speed Max. stitch length Presser foot Lifting lever height Knee lifter Feed dog height Needle (DP×5) Motor Control circuit 1. MACHINE SPECIFICATIONS -T3F 3,000 sti/min -T0F 4,000 sti/min -T33 3,000 sti/min -T03 4,000 sti/min 250-1,800 sti/min 1,000 sti/min 4 mm 7 mm 13 mm 1 mm #9-#14 #11-#16 AC servo motor (4-pole, 550W) Microprocessor T-8422C Max. sewing speed Start backtacking and continuous backtacking speed End backtacking speed Max. stitch length Presser foot Lifting lever height Knee lifter Feed dog height Needle (DP×5) Motor Control circuit T-8452C Max. sewing speed Start backtacking and continuous backtacking speed End backtacking speed Max. stitch length Presser foot Lifting lever height Knee lifter Feed dog height Needle (DP×5) Motor Control circuit T-8722C, 8752C Max. sewing speed Start backtacking and continuous backtacking speed End backtacking speed Max. stitch length Presser foot Lifting lever height Knee lifter Feed dog height Needle (DP×5) Motor Control circuit -403 4,000 sti/min -433 -405, -407 3,000 sti/min 250-1,800 sti/min 1,000 sti/min 4 mm 7 mm 10 mm 1 mm #11-#16 AC servo motor (4-pole, 550W) Microprocessor 5 mm #14-#22 -403 3,000 sti/min -405, -407 250-1,800 sti/min 1,000 sti/min 5 mm 7 mm 10 mm 1 mm #11-#16 #14-#22 AC servo motor (4-pole, 550W) Microprocessor -403 3,000 sti/min -405, -407 250-1,800 sti/min 1,000 sti/min 7 mm 7 mm 10 mm 1 mm #11-#16 #14-#22 AC servo motor (4-pole, 550W) Microprocessor T-8421C, 8422C, 8452C, 8722C, 8752C 2

Section	Page
COVER	1
SAFETY INSTRUCTIONS	3
1. Safety indications and their meanings	3
2. Notes on safety	4
3. Warning labels	6
CONTENTS	8
1. MACHINE SPECIFICATIONS	10
2. NAMES OF MAJOR PARTS	12
3. INSTALLATION	13
3-1. Table processing diagram	14
3-2. Installation	14
3-3. Lubrication	18
3-4. Connecting the cords	20
3-4-1. Opening the control box cover	20
3-4-2. Connecting the cords	20
3-5. Test operation (Operating the treadle)	25
3-6. Adjusting the treadle operation	26
4. PREPARATION BEFORE SEWING	27
4-1. Installing the needle	27
4-2. Removing the bobbin	28
4-3. Winding the lower thread	29
4-4. Installing the bobbin	30
4-5. Threading the upper thread	32
4-6. Adjusting the stitch length	34
4-7. Using the knee lifter	34
4-8. Using the thread wiper (models with thread trimmer only)	34
4-9. Corner sewing method (T-8452C, 8752C)	35
4-9-1. To stop the needle bars (right and left)	35
4-9-2. Number of stitches: quick-reference guide	35
5. USING THE G50 OPERATION PANEL(BASIC OPERATIONS)	36
5-1. Names and functions	36
5-2. Sewing start and end backtack stitches	38
5-3. Sewing continuous backtack stitches	39
5-4. Sewing fixed stitches	40
5-5. Sewing pleat presser stitches	41
5-6. Using the lower thread counter	42
6. USING THE G50 OPERATION PANEL(ADVANCED OPERATIONS)	43
6-1. Names and functions	43
6-2. Adjusting the needle up stop position	44
6-3. LOCK key	45
6-4. Resetting all settings to their defaults	46
7. USING THE G10 OPERATION PANEL(BASIC OPERATIONS)	47
7-1. Names and functions	47
7-2. Sewing start and end backtack stitches	48
7-3. Sewing continuous backtack stitches	49
8. USING THE G10 OPERATION PANEL(ADVANCED OPERATIONS)	50
8-1. Changing the needle stop position	50
8-2. Slow start	51
8-3. Correction sewing	52
8-4. Thread trimming lock (models with thread trimmer only)	53
8-5. Setting the maximum sewing speed	54
8-6. Adjusting the needle up stop position	55
8-7. Lock function	56
8-8. Resetting all settings to their defaults	56
9. SEWING	57
9-1. Sewing	57
9-2. Backtacking	58
9-3. Sewing condensed stitches	59
10. THREAD TENSION	60
10-1. Adjusting the thread tension	60
10-2. Adjusting the presser foot pressure	61
10-3. Adjusting the presser foot floating amount (minute lifting amount)	62
10-4. Adjusting the trailing length after thread trimming (models with thread trimmer only)	62
10-5. Adjusting the thread take-up amount	63
11. CLEANING	64
11-1. Daily cleaning procedures	64
11-2. Lubricating via the oil cover (every 6 months)	65
11-3. Applying grease (Semi dry specifications)[When “GrUP” appears ... When using the G50 operation panel]	66
11-4. Applying grease (Semi dry specifications)[When “GrUP” appears ... When using the G10 operation panel]	69
12. ADJUSTING THE ROTARY HOOK LUBRICATION AMOUNT	72
13. STANDARD ADJUSTMENT	73
13-1. Safety switch position	73
13-2. Thread take-up amount for thread take-up spring	74
13-3. Thread take-up spring tension	75
13-4. Clearance between rotary hook and needle plate	76
13-5. Clearance between rotary hook and opener	77
13-6. Presser foot height	77
13-7. Needle and rotary hook timing	78
13-8. Installing the feed dog	80
13-9. Feed dog position	81
13-10. Feed dog height	82
13-11. Feed dog angle	83
14. TROUBLESHOOTING	84
14-1. Sewing	84
14-2. Error code displays	89
15. 7-SEGMENT DISPLAY	93

Match case Limit results 1 per page

T-8421C, 8422C, 8452C, 8722C, 8752C

1. MACHINE SPECIFICATIONS

T-8421C

-T3F

-T0F

-T33

-T03

Max. sewing speed

3,000 sti/min

4,000 sti/min

3,000 sti/min

4,000 sti/min

Start

backtacking

and

continuous

backtacking speed

250–1,800 sti/min

End backtacking speed

1,000 sti/min

Max. stitch length

4 mm

Lifting lever

7 mm

Presser foot

height

Knee lifter

13 mm

Feed dog height

1 mm

Needle (DP

#9–#14

#11–#16

Motor

AC servo motor (4-pole, 550W)

Control circuit

Microprocessor

T-8422C

-403

-433

-405, -407

Max. sewing speed

4,000 sti/min

3,000 sti/min

Start

backtacking

and

continuous

backtacking speed

250–1,800 sti/min

End backtacking speed

1,000 sti/min

Max. stitch length

4 mm

5 mm

Lifting lever

7 mm

Presser foot

height

Knee lifter

10 mm

Feed dog height

1 mm

Needle (DP

#11–#16

#14–#22

Motor

AC servo motor (4-pole, 550W)

Control circuit

Microprocessor

T-8452C

-403

-405, -407

Max. sewing speed

3,000 sti/min

Start

backtacking

and

continuous

backtacking speed

250–1,800 sti/min

End backtacking speed

1,000 sti/min

Max. stitch length

5 mm

Lifting lever

7 mm

Presser foot

height

Knee lifter

10 mm

Feed dog height

1 mm

Needle (DP

#11–#16

#14–#22

Motor

AC servo motor (4-pole, 550W)

Control circuit

Microprocessor

T-8722C, 8752C

-403

-405, -407

Max. sewing speed

3,000 sti/min

Start

backtacking

and

continuous

backtacking speed

250–1,800 sti/min

End backtacking speed

1,000 sti/min

Max. stitch length

7 mm

Lifting lever

7 mm

Presser foot

height

Knee lifter

10 mm

Feed dog height

1 mm

Needle (DP

#11–#16

#14–#22

Motor

AC servo motor (4-pole, 550W)

Control circuit

Microprocessor