,,..s2+..,.,,.<..:, .,,;., .,
,:’- .-=..-, ,
I
@ In a fractionof a secondafterthe depressionofthepnnt switch,
the main motor starts to run and the gear train startsto drive.
The paper feed gear also startsto run, but the takeup rollerS
not driven beoause the rotationof the gear is not mnveyed to
lhe takeup rollershaft as the protrusionon the clutchsleeve is
~ In 1.1 seands afterthe startofthe man motor,the upperpaper
feed solenoid(UPFS) is energizedfor a moment.With this,the
latchdisengagesfrom the protrusionso that the gear rotationis
conveyd
to the takeup roller shaftto startfeedingpaper.
Paperfeedclutti springpro-tin
--
tes
:---
-
SF-7700
SF-77=
U* -tte tskeuproller
/
\
PSroller
Paperentry-r (MS1)
,
The PS mler begins to rotate when the PS sotenoid(PSS)
energizes,the mpy paper is ~
ontothe transterunit,
me PS rollerativation timingMn be presetusingtestmmmand
w. (See my lead edge adjustment,Op~ system.)
Ptintswfiqh
‘(PSW) +
Readylamp !
(
RPL)11
Mdnmotor
(MM)
PSsolenoid
(Pss)
Paperfeedsolemti
( UPFS j
*o.lsec
1
I
1
I
I
0.3 Sas
t
1
1
I
11.1sec
1
I
~ 0.2sec
I
:
I
I
I
B. Lowercassetief- o~ration
2, Atier the takeuo roller makes a full turn, the protrusionis held
by the latchagain and the takeup rollerrotatloflStOpS.
‘~ Meanwh;le,the paperis cardedintothe@pier bythe paperfeSd
rOllersandstops at the Ps rollers~a~se the paperentrysensor
(MS1) is hitby the
leading age of we passingpaper.ne paper
.ISheld there tem~rarily in Ordertomake synchronizationwith
:he Imagelead edga area of the drum. While the paper iSheld
bv :he PS‘roller,buckleis farmed in the copy paper at the Ps
B
‘Oilersas the paper feed rollersContinUeto rotate.
@ The figurebehw showsthe relationbetweenthe takeup roller,
takeup rollerclutchsleeve, and the paper feed Iatti, when the
ready lamp is on
Lower-~
Lower
~fte paperfeedsol-’ (LpFS)
(Viw fromreartramsWe)
@ In a fration of a secondafter the depressionof the printswitch,
the main motorstartsto run and the gear train startsto onve.
The paper feed gear also statis to fun, but the takeup rolleriS
not driven-use tie rotation’of the gear is not @nveyed to
the takeup rollershaft as the protrusionon the clutchSl~Ve is
held by the latch.
8-2
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