Janome 634D User Manual

SERVICING
MANUAL
MODEL 634D

Janome 634D Specifications

General

Type	Serger
Number of Threads	2/3/4
Differential Feed	Yes
Maximum Sewing Speed	1300 stitches per minute
Adjustable Cutting Width	Yes
Built-in Rolled Hem	Yes
Needle Threader	No
Max Stitch Length	4 mm
Differential Feed Ratio	0.5 to 2.25
Stitch Options	Rolled Hem
Presser Feet	Standard Presser Foot
Stitch Length	1 - 4 mm
Weight	8.1 kg

Summary

TO CHANGE THE TOP COVER UNIT

TO ADJUST THE NEEDLE BAR HEIGHT

TO ADJUST THE FEED DOG HEIGHT

TIMING OF NEEDLE AND FEED DOG

Adjusting the timing relationship between the needle and feed dog.

TO ADJUST THE TENSION OF SUB THREAD TENSION DIAL

TO ADJUST THE NEEDLE AND THE UPPER KNIFE TIMING

Procedure for setting the correct timing for the needle and upper knife.

TO ADJUST THE STITCH LENGTH

TO ADJUST THE CLEARANCE BETWEEN NEEDLE AND LOWER LOOPER / NEEDLE GUARDS

Setting clearances between needle, lower looper, and needle guards.

TO ADJUST THE CLEARANCE BETWEEN NEEDLES AND FIXED NEEDLE GUARD

Procedure to set clearance between needles and the fixed needle guard.

TO ADJUST THE POSITION OF CHAINING-OFF FINGER

TO ADJUST THE NEEDLE AND THE LOWER LOOPER TIMING

Procedure to set the correct timing between the needle and lower looper.

TO ADJUST THE POSITION OF UPPER LOOPER

TO ADJUST THE UPPER & LOWER LOOPERS TIMING

Setting the timing for both the upper and lower loopers.

TO ADJUST THE CLEARANCE BETWEEN LOOPERS

TO ADJUST THE CLEARANCE BETWEEN NEEDLE AND UPPER LOOPER

TO ADJUST THE POSITION OF KNIVES

TO ADJUST THE THREAD TENTION DIAL