Mainboard Replacement Procedure; Media Feed - Distance Adjustment Basic Principles; Mechanical Toleration - MUTOH Rockhopper 3 Troubleshooting Manual

3.4.2 Mainboard replacement procedure

Step 1 : Load the correct, latest firmware
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Via flash-card
•
Via parallel cable
Step 2 : Start-up machine, push "Cancel" to select the correct language
Step 3 : Start-up machine, push "up-down" simultaneously to select the correct machine-type
Step 4 : Change the ink-fill flags according to the loaded ink inside the machine
Step 5 : Reinsert following parameters:
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Headranks
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Serial number
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Calibration
If you have a parameter-backup that is ok, you also restore parameters this way of course. Taking into
account of exceptions described elsewhere in this troubleshooting guide.
3.4.3 Media Feed – Distance adjustment basic principles
Between 2 print passes, there is a media-forward movement. Each movement has a maximum tolerance of
20 µm. There are different factors that can influence the media-forward movement!!
3.4.3.1

Mechanical toleration:

Drive-rolls or Grid-rolls are the rolls that drives the paper into X-direction. This media-movement varies,
depending of the circumference of the drive-roll. The drive-roll tolerance is compensated and in and
adjustable parameter, called the "PaperFeedLen".
The grid rollers are composed of multiple steel bars, coated with a diamond-like material. This coating
ensures that the material isn't frictioning during media feed. Therefore the media feed can be extremely
accurate as the feeding-tolerance is maximum 20 µm.
To make the initial calibration of the PaperFeedLen parameter, the Feed-Adjustment procedure needs to be
done inside the diagnostics menu.
Notes
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When proceeding with the adjustment, make sure in the "ready to work" mode, the printer is configured
on the native head-resolution, 360x360 dpi! Other resolutions might cause unreliable results.
•
It is recommended to make all the machine calibrations under this setting.
Important
•
Any change in this specific parameter, means that all the distance adjustments found for all the
materials used on this printer need to be recalibrated again.
•
If the PaperFeedLen parameter has been changed for some reason, all the distance
adjustments you have for your materials will be invalid and have to be recalibrated.
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Troubleshooting
AP-74700 – Rev. 1.0 – 10/03/2008