Janome 1200D Manual de usuario

PARTS LIST

SERVICE MANUAL

MODEL: 1200D

First Edition: 21 February 2019

SERVICE MANUAL

TABLE OF CONTENTS

A.General directions and recommendations

B. Recommendations

C. Mechanical sewing disorders

D. Adjustment of the automatic tension unit

E. Position of program selection - display drum indicator and display window

F. Position of display drum indicator and upper looper shifting cam

G. Adjustment of the Chain looper tension dial

H. Gauge for the after - sales service

1. Removing Machine Base and Back Cover

2. Removing Front Cover and Mounting Covers

3. Angular position of balance weights and position of eccentrics

4. Height and alignment of cloth presser bar

5. Height and orientation of needle bar in relation to the needle plate holes

6. Height - clearance - angular position of lower looper

7. Clearance of needle guards

8. Timing of lower looper

9. Angular position of upper looper

10. Clearance and timing of upper looper to lower looper

11. Chain looper : angular position - clearance - orbital timing - clearance of

chain needles guards

12. Chain looper thread take up rotary cam

13. Height of feed dog

14. Upper knife and vertical feed timing

15. Horizontal feed timing against chainstitch needle

16. Differential feed

17. Position of fixed cutter and cutting width dial setting

18. Position of loopers threads take up lever

19. Safety device - Presser foot

20. Top Cover device

ANNEX

　 Tools for setting SL/DF Dials

　 Setting positions of SL/DF Dials

　 Clearance between Feed Dog and Needle Plate

　 Trouble shooting - Cover Hems

　 Cover Hem stitch formations

GENERAL DIRECTIONS AND RECOMMENDATIONS A

Safety

For safety reasons, the sewing machine must

be disconnected from the mains:

- Whenever the machine is left unattended

- Whenever preparing the machine for sewing

- Whenever servicing

- Whenever replacing mechanical or electrical parts or accessories

Needles

Usually needles of the system 130/705 H may be used. However, in certain

cases stitch quality may be improved by using type ELX 705 needles.

Choose needle size No.80 for sheer materials and No.90 for normal or thick materials.

Threads

Choose a good quality polyester thread or blended thread.

Lubrication

Besides the 2 oiling points marked in red, the machine is equipped with

self-lubrication bearings and parts. Lubricate the machine as follows: when using it

for the first time - if it has not been used for some time - when it has been intensively

used for 7 to 8 hours.

RECOMMENDATIONS B

1. Never connect the machine to a different voltage than that marked on the specification

plate.

2. For safety reasons, never perform any repairs on the power supply circuit without

first removing the mains lead from the machine.

Never plug in or run the machine unless all the connections are correctly set.

When changing the light bulb, it is neccessary to disconnect the mains lead.

MECHANICAL SEWING DISORDERS C1

First of all, please refer to the paragraph entitled "maintenance" in the instruction

manual, especially when machine does not turn freely by turning the flywheel by hand.

If necessary, check and adjust tightness of motor belt.

Given below are the most frequent disorders. In most cases, they can be remedied by

checking the adjustments in the following order. However, before checking the

adjustments, make sure that the threading is correct and that all the thread passages

are okay.

1. Skipped overlock stitches

Check and adjust if necessary:

- Needle bent or with a dull point - replace needle

- Needle not set correctly - refer to "changing the needle" in the instruction manual

- Burrs on upper or lower looper - polish

- Burrs on chaining finger - polish

- Excessive tension on the needle thread

- Height and orientation of needle bar

- Clearance between point of lower loopers and needle

- Clearance between upper and lower loopers

- Timing of upper and lower loopers against needle

- Feed timing

2. Skipped chainstitches - Cover hems

Check and adjust if necessary:

- Needle and chain looper thread tensions not balanced

- Needle bent or with a dull point - replace needle

- Needle not set correctly - refer to "changing the needle" in the instruction manual

- Burr on chain looper - replace or polish

- Upper knife is dull - replace

- Chain looper needle clearance

- Chain needle guard clearance

- Angular position of chain looper

- Orbital timing of chain looper

- Chain thread take up lever timing

- Height and orientation of needle bar

- Needle plate spring plate bent

Clearance and position between back of chain looper and needle L0

Note: For more information, see pages .

MECHANICAL SEWING DISORDERS C2

3. Thread breakage

Before checking the adjustment, make sure of the good quality of the thread and the

needle, the correctness of threading and the smoothness of all the thread passages.

Quite often, a damage to thread passage is the cause of thread breakage. If all these

points are in order, check the following:

- Dull point of needle or bent needle - replace.

- Dull or burred point of looper - replace.

- Scratch or injury on chaining finger of needle plate - replace.

- Too strong thread tension.

- Unsmooth or injured edge of needle hole on needle plate (thread breakage of chain

stitches) - replace.

4. Irregular stitches

- Inadequate setting of thread tensions - re-adjust.

- Unsmooth thread passage - polish.

- Height of feed dog.

- Position of looper thread take up levers and thread guides.

- Upper knife is dull - replace.

- Damage on needle plate face or presser foot sole - replace.

- Incorrect alignment of thread guide bar with spool pins - reset it at correct

position to align to spool pins.

5. Breakage of needle

Check and adjust if necessary

- Dull point of needle or bent needle - replace.

- Incorrect placement of needle - refer to "changing the needle" in the instruction manual. .

- Clearance of needle guard and (chain needle).

- Incorrect alignment of needle holes of presser foot and needle plate.

- Clearance from needle to lower looper.

- Clearance between the upper and lower loopers.

- Feed timing.

- Horizontal feed timing against chain-stitch needle.

ADJUSTMENT OF THE AUTOMATIC TENSION UNIT D

1. Remove: Mains lead - Front cover.

2. Select sewing program 1 "SAFETY 4THREAD"

3. Check and make sure that the lever "h" is facing the notch of tension cam "g" for

yellow needle thread.

4. If not loosen screw "a" and turn DT cam pulley "j" forward or backward until the

lever "h" is facing the notch of tension cam "g". Then, tighten screw "a".

5. If the position of the display drum indicator "d" is not aligned with the display

window "e", then loosen screw "c" and adjust the position of drum.

6. Fasten screw "c" and recheck the position of the display drum "d".

Note: In order to check the alignment of the display drum indicator "d" and the disolay

window "e", it is necessary to set the front cover on to machine.

POSITION OF PROGRAM SELECTION-DISPLAY DRUM INDICATOR

AND DISPLAY WINDOW

SELECT

2 mm

POSITION OF THE DISPLAY DRUM INDICATOR

& UPPER LOOPER SHIFTING CAM F

1. Remove: Mains lead - Front cover

2. Make sure if tension cams and levers are set in proper positions when selecting

sewing program 1 "SAFETY 4THREAD" (See and Check Page E).

3. Select sewing program 10 "COVER HEM/CHAINSTITCH".

4. Bring the needle bar to its lowest position by turning a handwheel toword you.

5. Loosen screw "a" and turn the upper looper shifting cam "b" until the hook of the

looper follower "c" falls into the V-shaped holl ow of the cam "b" ʻSee View A ).

Check if a cam "b" and looper follower "c" are positioned as own in View B .

6. Fasten screw "a" and recheck if the upper looper shifting connector "d" is pulled

up by a spring.

view A b

view B

SELECT

2 mm

1.0~1.5mm

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