AMF S-311 Manuel de service télécharger pdf (Page 61)

e-mail: service@amfreece.cz; parts@amfreece.cz; website: www.amfreece.com

Phones: +420 582 309 146 (Service); +420 582 309 286 (Spare Parts); Fax: +420 582 360 606

Revised 03/2006

S-311

1-49

E - STANDARD MACHINE ADJUSTMENT

16.1 After installation of the thread retainer with trimming knife Ê, adjust the height of the thread

retainer to within 0.2 mm of the top of the throat plate.

16.2.Using the screw Ë adjust the trimming knife Ê so that the right edge of the nipper is covered

with the stitching plate edge (see picture). The thread holder must lean on the front side

of the throat plate to catch and hold the lower thread for next buttonhole sewing. When the

trimming knife moves, the thread holder must move over the throat plate without binding. To

adjust - loosen the nut of the screw and screw out or in the adjusting screw . Tighten the

nut.

16.3.Position the tip of the trimming knife Ê 0.9 mm in front of the needle Ï by loosening screw Î.

Check the adjustment for keeping the clearance according to the point 16.2.

16.4.The normal home position of the trimming mechanism Ê is adjusted using screw Ð. Correct

adjustment prevents cutting of the looper thread Ñ (See diagram).

16.5 Adjust the initial position of the control lever Ò to the space 0,05 — 1 mm from stud Ó

by the screw after loosening its nut.

16. UPPER TRIMMING AND LOWER INTERCEPTION - CT

EDGE

the looper position when trimming

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AMF S-311 Manuel de service Page 61