Brother Z-8550A 12-2.Standard setting values

						12. TREADLE UNIT
12-2. Standard setting values
		SPECIFICATIONS	Treadle unit -G			Treadle unit -H
		Operation	Automatic presser	foot lifting	Automatic presser foot lifting
Function	Signal		does not occur			occurs
			No modulation at 1st step forward			Modulation at 1st step	forward
No.	(Diagram	Spring position setting	or backward			and backward
	below)
			(Figure [a] on previous page)			(Figure [b] on previous page)
		Function	Length from S0	Force		Length from S0	Force
			(mm)	(N)		(mm)	(N)
-	S0	Neutral point	0	-		0	-
82	S1	Forward automatic	-	-		2 (*1)	10
		presser foot lifting point
83	S2	Low speed operation	3	10		5	25
		starting point
84	S3	Speed change starting	6	-		7	-
		point
85	S4	Maximum speed arrival	S5-1	-		S5-1	-
		point
-	S5	Maximum forward	14.5	12		14.5	32
		depression point
81	S6	Backward automatic	-	-		2 (*2)	14
		presser foot lifting point
80	S7	Thread trimming	5	22		5	35
		operation point
-	S8	Maximum backward	8	28		8	43
		depression point
(*1) Enabled when DIP switch No. 1 is set to “ON” and memory switch No. 13 is set to “1”.
(*2) Enabled when memory switch No. 12 is set to “0”.

•When the connecting rod installation position is on the inside, the setting value is the amount of movement when the treadle is depressed forward or backward.

•For treadle unit -H, the point (F) where the forward depression force changes is in between S1 and S2, and the point (R) where the backward depression force changes is between S6 and S7.

Sewing

speed

Depressed backward Neutral Depressed forward 1841M

Z-8550A, 8560A 104