Pfaff 935, 955 To remedy Them Cause, Inserted, Bent, Thread Breaks, Too, System 130/705 H Needle

Faults and			how			to remedy			them
Cause:
1. Machine skips							stitches
Needle		not	inserted					correctly.
Wrong		needle			used.
Needle		bent		or		blunt.
Machine threaded							improperly.
Needle		too	thin			for		thread	used.
2.	Needle		thread				breaks
For	any of		the						.
						above reasons
Thread		tension				too		high.
Poor-quality				or		knotty thread used,					or
				has become too dry						by
thread		that
excessive storage							.

Remedy:
Push	needle			up		as far	as	it will	go,	its
flat shank			side		facing		rear.
Insert		system 130/705 H							.
								needle
Insert						.
		new needle
Check						.
		threading
Use	thicker					.
				needle
See	par.		1	above.
Regulate			thread			tension.
Use	only		good		quality		thread.

3.	Needle		breaks
Needle		not	pushed		up	as far as		it
will	go.
Needle		bent.
Needle		too	thin	or	too	thick.
Needle		bent and		strikes			needle	plate
because workpiece					is	pushed or pulled.
Bobbin		case improperly					inserted.

Insert new		needle		and	push		it up	as	far
as it will go.
Insert	new	needle		.
See Needle		Chart.
Let machine feed				the			.
					workpiece
Only guide		the	material			lightly.
When	inserting		the bobbin				case,	push		it
in as	far as it will			go.

4. Seam is not uniform

Tension out						.
		of adjustment
Thread too		thick,		knotty		or	hard.
Bobbin	thread		wound		unevenly.
Kinks	appear		on	top	and	bottom		of
material.

Check	upper and lower					.
				tensions
Use first-class		thread only.
During	bobbin	winding,		do	not	hold
							the
thread	in hand,		but pass it		through
bobbin winding			tension.
Thread machine			properly and check
	.
both tensions