CONTENTS
1. NEEDLES & THREADING THE MACHINE
1-1 Needles ··················································· 1
1-2 Replacing the needle ································· 1
1-3 Threading the machine ····························· 1
2. MACHINE SPEED
2-1 Machine speed & direction in which the machine
pulley runs ·············································· 2
2-2 Motor & belt ············································ 2
3. LUBRICATION
3-1 Oil ························································· 3
3-2 Oiling ····················································· 3
3-3 Replacing the oil and the oil element ··········· 3
4. SEWING MACHINE INSTALLATION
4-1 Machine head dimension ··························· 4
4-2 Installing the machine ······························ 4
4-3 Cutting the machine table··························· 5
5. TIMING OF THE LOOPER TO THE NEEDLES
5-1 Angle and height for installing the looper ···· 6
5-2 Looper left-to-right movement ···················· 6
5-3 Looper setting distance ····························· 7
5-4 Needle height ·········································· 7
5-5 Needle/looper front-to-back relationship ······ 8
5-6 Changing the looper orbit ·························· 8
5-7 Changing the amount of the looper front-to-back
movement ··············································· 9
6. FRONT AND REAR NEEDLE GUARDS
6-1 Position of the needle guard (rear) ·············· 9
6-2 Position of the needle guard (front) ··········· 10
7. SPREADER
7-1 Position of the spreader ··························· 11
7-2 Position of the spreader guide ·················· 11
7-3 Timing of the spreader ···························· 12
7-4 Position of the spreader (WX8842, 8842-1)···· 12
7-5 Position of the spreader guide (WX8842, 8842-1)
······························································· 13
8. FEED DOGS & STITCH LENGTH
8-1 Feed dog height & tilt ····························· 13
8-2 Stitch length ·········································· 14
8-3 Differential feed ····································· 15
9. PRESSER FOOT
9-1 Presser foot pressure ······························ 15
9-2 Position of the presser foot & foot lift ········· 16
10. STITCH FORMATION
10-1 Position of the needle thread guides ········· 16
10-2 Position of the thread guide on the needle
thread take-up ······································ 17
10-3 Timing of the needle thread take-up ········ 17
10-4 Position of the needle thread guard ·········· 17
10-5 Position of the thread guide of the spreader
thread take-up ······································ 18
10-6 Position of the thread guide of the looper thread
take-up ················································ 18
10-7 Position of the looper thread take-up ········ 18
11. EMK ELASTIC FEEDER
11-1 To insert the lace/elastic ························· 19
11-2 Lace/elastic guide on the presser foot ······· 19
11-3 Adjusting the front of the presser foot ······ 19
11-4 To install the tape guide ························· 19
11-5 Feeding amount of the lace/elastic ··········· 20
11-6 Pressure of the elastic feed small roller ·· 20
11-7 Checking the performance of the elastic
feeder ·················································· 20
11-8 Oiling each part ···································· 21
12. EMK FRONT KNIFE DEVICE
12-1 Adjusting and oiling the lower knife holder 21
12-2 Replacing the lower knife ······················· 21
12-3 Replacing the upper knife ······················· 21
12-4 Overlap of the upper and lower knives ····· 22
12-5 To sharpen the knife ······························ 22
13. REPLACING THE TIMING BELT
13-1 To remove the timing belt ······················· 22
13-2 To place the timing belt ························· 23
14. MC30 (TAPE CUTTER)
14-1 Power supply cord ································· 23
14-2 Intermediate cord ································· 24
14-3 Adjustment (Electric type) ······················ 24
14-4 Air piping & wiring (Air type) ················· 25
14-5 Air pressure ········································· 26
14-6 Adjustment (Air type) ···························· 26
15. CLEANING THE MACHINE
··················· 27
From the library of: Superior Sewing Machine & Supply LLC