Error Message:

HEAD: Unable to balance stroke to better than head bpmaxerr %

Applies to:

• Thermal

Service Information:

All new heads are capable of balancing to within 3 percent. Raising "bpmaxerr" to 5% is usually okay on most media. Stroke cal noise is also very dependent on the beam pointing so it may be possible to improve the stroke cal by changing "bposn" if things have moved slightly in the head. When changing bposn try steps of about +/- 200.

Look at scorr table values with "scorr" command to see if table is corrupt.

Look at the "stroke profile" results to see if there are any obvious weak pixels. If this is the problem and the weak pixel is near one end of the swath it may be possible to chop of the problem and keep the head imaging. When chopping pixels it is important to maintain the total imaging time so if the laser power or drum speed cannot be raised sufficiently order a new head and image at reduced speed untill it arrives.

Operator Action:

Try image again. If problem persist call service.

Cause:

• At least one of the measured light levels in the swath was not within bpmaxerr percent of the target light level at the end of the stroke calibration procedure.

See Also:

• NVS: head bpmaxerr
• NVS: head bposn
• Command: stroke cal
• Command: stroke profile
• Command: scorr