Brother MFC5890CN - Carriage Drive Mechanism

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Confidential
3.2.2.3 Carriage drive mechanism
The head/carriage unit, which integrates the print head unit and carriage, is supported and
guided by the CR guide rail and CR support chassis. The CR timing belt transmits the carriage
motor rotation to the head/carriage unit. Clockwise motor rotations move the head/carriage unit
to the right; counterclockwise ones to the left.
The CR encoder sensor on the top of the head/carriage unit scans the CR encoder strip above
the CR support chassis to monitor the current head position relative to the home position. The
controller uses this signal for robust control ensuring uniform speed.
The CR encoder strip is a clear film striped in a 1/150 inch cycle. It offers a choice of three
travel speeds of the head/carriage unit, 57.7, 43.3 and 21.7 ips, to match the print resolution.
CR guide rail
Head/carriage unit
CR encoder sensor
(Paper feed roller)
CR encoder strip
Carriage moto
r
pulley
Carriage motor
CR timing belt
CR support chassis
Idle pulley
(3_21_BHL9)