AMF S-101 Service Manual download pdf (Page 23)

Released: 10/2013

E-mail: [email protected]; webside: amfreece.com

Phone: +420 582 309 146; Fax: +420 582 360 606

C - CORRECT USAGE

2. NEEDLE EXCHANGE

2.1. Loosen the securing screw of the needle

and remove the original needle.

2.2. Place the needle so that the grove A of the needle is on the other side than the tensor

. The needle must not

have broken tip or other defect. You can check whether it is straight, if you roll the needle on the at pad. A good

needle does not deect in the tip.

2.3. Tighten the screw

3. THREADING THE MACHINE

WARNING!

make sure the power is switched off!

Look and quality of the buttonhole is inuenced by:

- threads, their elasticity and resistance to breakage

- thread thickness – make sure that thread has the same thickness

- material sewn (thickness, density, ber direction)

- upper and lower thread tension

- stitch density - see section A5

- stitch width

- technology of sewing process (size of material spreading, distance of stitches from the cut edge)

Correct buttonhole should have:

- uniform stitch density

- consistent chain formation

- symmetric eye shape

- proportional shape and size

- smoothly trimmed threads

S-101.M

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AMF S-101 Service Manual Page 23