Brother MFC5490CN - 2 ] Maintenance Unit Components; Cap Lift Cam and Its Gear; Head Cap Holder; Head Cap Unit

3-25
Confidential
[ 2 ] Maintenance unit components
Viewed from the top Viewed from the bottom
- Cap lift cam and its gear
These parts transmit the rotational torque of the ASF motor transmitted via the clutch gear L
to the head cap holder. (See [ 4 ] "Power transmission route to the head maintenance
mechanism and motor rotational direction.")
- Head cap unit
When the power is off or the machine is not printing, the head cap unit fits tightly over the
print head to prevent the head nozzles from drying up and to seal the head nozzles for purge
operations to suck up old ink.
- Head cap holder
This lifts up the head cap unit to fit it tightly over the print head to seal the head nozzles. (The
had cap holder is driven by the ASF motor.)
- Carriage lock
This is a part of the head cap holder. It locks the head/carriage unit in its home position so that
the head cap unit protects the head nozzles.
- Purge gear and purge bevel gear
These gears transmit the rotational torque of the paper feed motor via the clutch gear R to the
planetary arm. (See [ 4 ] "Power transmission route to the head maintenance mechanism and
motor rotational direction.")
- Planetary arm
This switches the rotational torque of the paper feed motor (transmitted via the purge gear and
purge bevel gear) to the pump switching unit or tube pump depending on the direction of
paper feed motor rotation.
-Purge cam
This rotating cam drives the pump switching unit, the air vent rods, and the head wiper. Each
drive position of the purge cam is detected by the purge cam switch. (See Section 3.2.3.)
Purge gear
Cap lift cam
Head wiper
Head cap unit
Head cap holder
Carriage loc
k
(Part of head
cap holder)
Air vent rods
Air vent cap
(
3
_
10
)
Maintenance unit
Cap lift
cam gear
(ASF changeover
gear)
Pump switching unit
Purge cam
Purge bevel gear
Purge gear
Tube pump
Planetary arm
(3_11)
Cap lift cam gear
(ASF changeover gear)