Providing a Force on Top of the Media
Bail
The bail provides a normal force on top of the media. Unlike on the DesignJet 220, there is no bail sensor on the DesignJet 230 and 250C and DesignJet 330 and 350C.
BailLift Mechanism
The bail features an automatic lift mechanism driven by the media motor using a series of gears and actuated by the cartridge carriage. The mechanism is different from that used in the DesignJet 220. The new cable5based design eliminates the torque on the axle of the bail5lift cam and thus improves reliability. The new mechanism is also more accessible. (Removal ' page 6529.)
Moving the Carriage
Carriagerive Mechanics
Motor Belt and Pulley
DThe carriage (Y5axis) drive consists of a DC motor directly driving a single belt and the carriage. This replaces the dual5belt system of the DesignJet 220.
DThe motor assembly itself provides the tension needed on the belt, eliminating the need for a separate pulley tensioner.
DThe belt clamps itself to the carriage; there are no separate belt clamps.
DThe interface between the motor shaft and belt is friction based.
DYou can remove the belt without having to remove the pulley on the left end of the belt.
Carriage Guidance
The carriage moves along on just one stainless steel slider rod. It is guided by two integrated bronze bushings, which are self5lubricating, and a back wheel.
Positional Feedback
An encoder strip, similar to that on the DesignJet 650C, provides feedback on the position of the carriage. The strip does not require adjustment.
Take care not to cut yourself on the encoder strip inside the plotter.
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