Singer 270 - Singer Service Manual Stop Motion Tripping Points; TIMING; Singer Service Manual Stop Motion Brake Adjustments

STOP MOTION TRIPPING POINTS
Fig. 34. Adju5ting the Tr ipping Points
TIMING
CHECK:
Tr ip pi ng point• on undorside of com shou ld be
se t so th at interlocking orm d1op s bock immed iarely
on to comming surface of machine pulley (ti ght) OS
soon as notch, on machine pulloy, poss es int erlock ·
ing·orrr, (one irterlockino--orm width). -his will allow
the most possible amount of machine coast.
SETTING:
With machi ne tilted back on iu hinges, l oosen
the two tripping point screws shown in Fig. 34 ond
movo trippin g point to the righ t to set trip off sooner
or left to set trip off loror. Securely tighten tripping
point screws.
STOP MOTION BRAKE
CLEARANCE
CHECK:
Ther• should be approximotely l ·32 inch clear·
once between broke shoe ond machine pulle~ (tight)
when noch1ne is in run posrtion (See Fig . 35).
ECCENTRIC STUD
BRAKE SHOE
?
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Fig. 35. Adjusting the Stop Motion Brokt'
21
SETTING:
Engoge machine in run position end l oosen the
set sctew shown in Fig. 35.
Turn
eccentric stud unti I brc~c shoe clears
machine pulley by oppro•imotcly 1/ 32 inch . Th en
tighten set screw.
PRESSURE
CHECK:
Broke pressure should be r egu lated to prevent
moch1nc from going into "stop" too hard to ovoid
damage to mochine ports.
When checking brc*e pressure, machine speed
ond thickness of material to be sewn hove a definite
re l at ion to t he amount of pre,,ure re qu i red .
SETTING:
Loos en pinch screw shown in Fig. 35 a nd turn
adjusting scr ew inward for more pressu re or outward
for less pressure. Then t1ghten pinch screw securely.
NOTE: Check stop motion broke ad1ustment obout
once a month. Loss of broldng power due to wear or
gloting of braking surfaces moy be compl!tlsotod
for by re -adju s t ing for correct clearance or.d pressure.