DETAILS
B660 28 SM
3.4.2 ELECTRICAL COMPONENT SUMMARY
Motors
No. Name Description
M1 Feed Motor Drives the feed rollers and exit rollers of the Z-folding unit.
M2 Fold Roller Motor Drives the 1st, 2nd, and 3rd fold rollers.
M3 Lower Stopper
Motor
Raises and lowers the lower stopper. It 1) Raises the upper stopper to
the proper position for the size of the paper selected for the job, and 2)
Lowers the lower stopper until the lower stopper sensor detects that the
lower stopper is at its home position where it remains until the start of
the next job.
M4 Upper Stopper
Motor
Lowers and raises the upper stopper. It 1) Lowers the upper stopper to
the proper position for the size of the paper selected for the job, and 2)
Raises the upper stopper until the upper stopper sensor detects that the
upper stopper is at its home position where it remains until the start of
the next job.
PCBs
No. Name Description
PCB1 Main Control Board Controls the operation of the Z-folding unit.
PCB2 PSU Supplies the dc power for the Z-folding unit.
PCB3 Surge Protector Board AC input and breaker relay board.
PCB4 DC Relay Board PSU DC output and DC motors and sensor relay board.
Sensors
No. Name Description
S1 Feed Sensor Detects the leading edge and trailing edge of the sheet at the top
of the paper path before Z-Folding. When the feed sensor detects
the leading edge, it energizes the pinch idle roller solenoid. The
solenoid pulls the pinch idle roller away from the pinch feed roller
so the paper can fall below these opposing rollers.
S2 Fold Timing Sensor (1) Detects the leading edge of the sheet and energizes the pinch
idle roller solenoid (upper) to pull the pinch idle roller away from
the pinch feed roller so the sheet falls through the gap between
these rollers. (2) Detects the trailing edge of the sheet and
energizes the pinch idle roller solenoid (lower) to push the pinch
idle roller against the pinch feed roller.
S3 Front Door Sensor Detects when the top cover of the Z-folding unit is closed and
signals an alert that the cover is open. The unit cannot be used
until this cover is closed.
S4 Leading Edge Sensor Mounted above the lower stopper. The leading edge sensor 1)
detects the leading edge of the sheet when drops onto the lower
stopper, 2) detects the leading edge again when the paper is
pulled up into the nip of the 1st and 2nd fold rollers. If the leading
edge sensor does not detect the edge at the prescribed times, it
will signal an error.
S5 Lower Exit Sensor Mounted below the lower exit rollers. Detects the leading/trailing
edges of the folded sheet as it passes below. If these edges do
not pass at the times prescribed for the selected paper size, the
sensor will signal a jam alert.
S6 Lower Stopper HP
Sensor
Detects the lower stopper when it reaches its home position and
turns off the lower stopper motor.
S7 Upper Exit Sensor 1) Detects the leading/trailing edges of each sheet unfolded sheet
after it passes over the closed junction gate, 2) Detects the
leading/trailing edge of each folded sheet as it leaves the vertical
feed path below. If the edges do not go by for the time prescribed
for the paper size, the sensor will send a jam alert.
S8 Upper Stopper HP Detects the upper stopper when it reaches its home position and
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