Croma24 Service Manual
Figure 3-9. Examples of Banding.
Hardware banding is usually characterized by consistent banding strips as shown. It signifies a slippage in the media’s normal move- ment that is possibly due to the stepper motor, lower drive shaft assembly, or the rollguides on the back of the printer. All these possible faulty areas deal with a rotational movement that, if faulty, will generate a consistent banding pattern. The MPCB and Carrier PCB can also cause this type of error to incur.
Software banding is characterized by inconsistent banding lines. These banding lines are generated by the software when incorrectly interpreting the paper advancing/ink firing sequence of the expected print file. Because it is not directly tied to a mechanical movement, the bands become inconsistent in both frequency and duration. The possible causes are the printer driver, the original software package, or the RIP, if used. To eliminate the chance that it is the printer driver:
1)Remove any RIP or network systems and connect the printer directly to the computer.
2)Print a test file approved by ENCAD that uses only the printer driver software and the ENCAD printer.
If the test file prints correctly, the problem lies in either the software package that generated the print or the RIP, if used.
