Brother HE-800A ￿￿-￿￿.Uneven seams (10) …… All stitches

￿					16. TROUBLESHOOTING
￿
￿￿-￿￿. Uneven seams (10) …… All stitches
Cause		Check			Remedy	Page
Threading	Upper thread threading				Thread the upper thread correctly.	58
	Lower thread threading				Thread the lower thread correctly.	60
Thread path	Flaw or abrasion on the				Polish with buff or replace the part.
	thread path				Especially, pay attention to finishing around needle
					plate hole.
						-
					Needle plate hole
					3996Q
Needle	Needle installation				Insert needle fully into needle bar	57
	Needle size				Replace needle with thicker one.	-
Thread chips or dust	Rotary hook rim				Remove thread chips or dust	69, 71
	Rotary hook edge
	Around needle plate hole
Upper thread	Upper thread tension				Increase upper thread tension while checking	62
					stitches.
	Thread and needle				Replace needle with one that fits for the thread.	-
Rotary hook holder	Flaw on the rotary hook				Polish with buff or replace the part.
	holder				Check flaw here
					Adjust the rotary hook	-
					overlap amount.
					3997Q
	Rotary	hook	holder	and	Adjust the rotary hook holder and inner rotary hook	74
	inner rotary hook overlap				overlap amount.
	amount
Rotary hook	Rotary hook lubrication				Decrease the quantity of lubrication oil.
					* Note that if you reduce the amount of oil too much,	26
					thread breakages may occur.
Bobbin winder guide	Bobbin thread tension				Adjust the tension on the bobbin winder guide.	-
	Uneven bobbin winding				Move bobbin winder tension bracket up and down	59
					to adjust.
Lower thread	Lower thread tension				Adjust the lower thread tension.	61
Bobbin case	Damaged outside			of	Polish with buff or replace the part.
	bobbin	case	and	bent	* Use the HE-800A bobbin case.	-
	bobbin holder spring, etc.
Stitch patterns	Purl stitch, whip stitch				Set using parameter number 11.	37

HE-800A 98