Roland VersaEXPRESS RF-640 Service Notes page 210

4-7 CALIBRATION (FEEDING DIRECTION) (Referential Time : 20 min.)
This adjustment is for calibrating the feed amount of media. It allows the media to be fed in proper amount by cali-
brating the variation in Grit Roller diameter. Calibration is made based on the value in feeding media [PET-G].
Without proper calibration, it may cause misalignment in the feed amount of media, and it results in the problems
such as white banding, banding of overlap or the dimension error of print result compared to the original data.
Take-up Unit must not be used during this adjustment.
Turn on the Sub Power SW while pressing [
1
[ ] keys to enter the Service Mode.
Setup the PET-G on the machine.
Select [PRINT MENU]>[CALIB.DEFAULT]>[TEST PRINT],
2
and press [ENTER] key.
Test Pattern will be printed.
Test print requires 510mm or more of the media
setup width.
Measure the length of the feed direction and use the value to
3
calculate the calibration amount with the formula shown at
4 .
Test pattern is always printed with offset 0.00%.
Even if a correction is made in the [SETTING]
menu, the test pattern is not changed.
], [ ] and
4-31
+
MENU
MENU
SERVICE MENU
SERVICE MENU
PRINT MENU
[ ] [ ]
PRINT MENU
CALIB.DEFAULT
[ ] [ ]
CALIB.DEFAULT
TEST PRINT
[ ]
500mm
Scan