Davin Toscana-C1b, Service Manual

Page: 310 / 365

Each compartment contains:
• 1 pump motor.
• 2 pumps (one for each print cartridge)
• 2 cams
When a print head tank needs ink:
• The printer switches on one ink pump motor. The motor and its worm gear are rotated forward or
reverse (depending on which type of ink is requested). Only one pump operates at a time.
• One or the other pump is operated, depending on whether the ink pump motor rotates forward or
reverse. (Two pumps that share a motor cannot operate together at the same time.)
• A cam striking a plunger vibrates the plunger to form the vacuum in the line that sucks ink from the
cartridge.
• The supply motor operates long enough to pump the prescribed amount of ink to the tank. Then it
switches off.
Print Heads
The mechanisms that supply the ink from the print cartridges to the print heads are identical for the machines
of this series.
No. Component
1 AS Air Sensors x2
Ink Supply
309
6