Guangzhou EC-PACK Packaging Equipment Co., Ltd.
EC-JET 1000Pro Continuous Inkjet Printer
93
Cause and Cure:
Clean the exit slot using the appropriate solvent for the type of ink being used in the printer. Make sure
that the print head cover is correctly positioned and securely fitted on the print head.
NOTE: Some of the Printhead Cover Catch print samples may show similarities with Phasing Errors
problems. The fundamental difference to note is that phasing errors still print ALL the drops, although not
in the correct positions, while print head cover catch (or clipping) problems show a considerable loss in
the number of drops printed.
10.5.2
Problem Solving - Ink System Mechanical Faults
FC12 Pressure Loss
There are several ways in which a pressure loss can manifest itself:
● a Low Pressure warning on start-up (error 3.12);
● a No VOD Adjustments warning (error 3.00);
● a significant discrepancy between Set Pressure and Read Pressure when the pressure is
set to 255 by the service engineer in Diagnostics;
● an obvious leak of ink from around the pump, the tubing or the manifold.
The following identifies how each of the ink system components can contribute to a loss of pressure in
the system:
Ink Tank Reservoir
● debris in the ink tank can cause either a partial or a total pressure loss. The debris can be pieces of foil
seals from ink bottles, or other extraneous material that has fallen into the reservoir.
Pre-Pump Filter
● debris from the ink tank reservoir that has been drawn into the body of the filter can cause a total, or
more usually a partial, pressure loss;
● over tightening of the connectors onto the threaded stud of the filter body can cause a partial pressure
loss by constricting the olive and reducing the size of the flow aperture;
● the actual filter membrane may have become blocked; it has done its job of protecting the pump.
Pump Assembly
The pump assembly is an electromagnetically-coupled gear pump.
● the pump motor has failed, resulting in loss of drive and hence total pressure loss;
● the motor has decoupled from the pump, so that the motor is spinning wildly but not turning the gears in
the pump head, again resulting in a total pressure loss;
● the gears in the pump are worn, resulting in less than totally efficient drive and a partial pressure loss;
● a leak has developed on the output side of the pump.
NOTE:
If the pump motor is turning but the pump itself is not, there will be a normal reading for Set
Pressure, but a zero reading for Read Pressure.
Main Ink Filter
● the filter has fulfilled its task and has eventually collected an excess of debris and become blocked;
● the PTFE tubing has been incorrectly fitted to the filter. If the tubing is pushed too far into the elbow
