Kyocera KM-4230 Service Manual page 88

Original switchback/conveying timing
Fwd. rotation
OFM Off
Rev. rotation
OFSW
SBFSSOL
SBPSOL
OSBSW
OCM
EFSSOL
DFTSW
Timing chart 1-3-11 Reversing the first face of the original
A During primary original feed, when the original feed switch (OFSW) turns on, the
switchback feedshift solenoid (SBFSSOL) also turns on, changing the position of the
switchback feedshift guide. This switches the path of the original to the original
switchback section.
B 556 OFM pulses plus 20 ms after the original feed switch (OFSW) turns on, the rotation
of the original feed motor (OFM) switches to the reverse direction and the original is
conveyed to the switchback section by the rotation of the switchback roller. The
switchback pressure solenoid (SBPSOL) simultaneously turns on to operate the
switchback pulley.
C When the trailing edge of the original turns the original switchback switch (OSBSW) off,
the switchback feedshift solenoid (SBFSSOL) turns off, the switchback feedshift guide
returns to the original position.
D 115 OFM pulses after the original switchback switch (OSBSW) turns off, the original feed
motor (OFM) turns off. 100 ms later, the original feed motor (OFM) rotates forward,
switching the rotational direction of the switchback roller. The original in the original
switchback section is then reversed and conveyed to the original conveying section.
E Simultaneously as the original feed motor (OFM) starts rotating forward, the original
conveying motor (OCM) turns on to convey the original onto the slit glass. The eject
feedshift solenoid (EFSSOL) simultaneously turns on, changing the position of the eject
feedshift guide. This switches the path of the original to the original switchback section.
F When the original is conveyed onto the slit glass, the DF timing switch (DFTSW) turns
on. 288 OCM pulses later, the switchback pressure solenoid (SBPSOL).
G 30 ms after the switchback pressure solenoid (SBPSOL) turns off, the original feed motor
(OFM) turns off.
556 P* 1
20 ms
115 P*
A B
100 ms
1
C D E
Scanning speed
30 ms
288 P* 2
Scanning speed
F G
1
* Burst of OFM pulses
* 2 Burst of OCM pulses
1-3-65
2A3/4