Brother B830 Series User Manual

[I] LOWER SHAFT AND ROTARY HOOK MECHANISM
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1. When pu lley 0 turns in th e ar row direc tion. its r ota ting mot ion is conveyed to upper sha ft f) to turn timing belt whee l
upper 0 .
2. The moti on is conveyed to tim ing belt wheel lower 0 via t imi ng belt 0 .
3. As lower s haft 0 which is connec ted to tim ing belt wheel l ower 0 rotat es. spiral gear 8 is turn ed .
4. Rotary
h ook ~ rotates via pini on gear 0 which is connec ted to rotary h ook base O.
(Opener)
1. O pen er crank 41) move s in the shape of an arc via rota ry hook ~ and ope ner link $ .
2. Op ener 4D which is co nn ected to opene r crank 41) moves in the shape of an ar c.
• The LS2-B837 sewing machine does no t c on tain a left side rotary hook. etc. because of the one ne edle.
IT] FEED MECHANISM
1. When pu lley 0 t ur ns in the arrow directio n. its rotating motio n IS conveyed to up per sh aft f) to t urn t imi ng belt wheel
upper O.
2. The mot io n IS co nv eyed to t immg belt wheel l owe r 0 via t imi ng belt 0 .
3. Eccentric wheel 8 whi ch is co n nec ted to lower s haft 0 rot ates via t imi ng belt wheel lower 0 a nd lower sh aft 0 .
4 . Level feed arm «!) moves in the sh ape of an arc via eccen t ric wheel 8 . level feed co nn ec ting r od 0 and level feed
connect ing link 0 .
5. Feed bar 41) moves b ack and fort h via feed ro ck shaft tD .
6. Feed bar fork 4D moves up and d own by vertical feed ecce ntri C wheel m whi Ch IS connec ted to lower shaft o.
7. The m oveme nt of fe ed dog 1s f1xed by th e co mb inati on of move ments in 1tem 5 and 1tem 6.
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From the library of: Superior Sewing Machine & Supply LLC

Brother B830 Series Specifications

General

Brand	Brother
Model	B830 Series
Category	Sewing Machine
Language	English