Roland VersaCamm VS-640 Service Notes page 270

Symptom 3 : Cut is OK at Lead Edge but is Getting Shifted as It Goes to the End of Print
Possible Causes
1. There is some setting value other than 0 set in [CUTTING MENU]>[CALIBRATION]>[FEED SETTING].
2. Expansion/Contraction of the media
3. Strong back tension of the heavy roll media causes the media to be fed less than it should be when printing.
Actions
1. Set 0 in [CUTTING MENU]>[CALIBRATION]>[FEED SETTING] in the User menu.
2. Prefeed the media to make it unrolled before starting a printing to decrease the back tension.
3. Use the crop marks.
4. Divide the file into 2 or more and output them as separate jobs in order to make the feeding distance of each job shorter.
Symptom 4 : Symptom1, 2 and 3 are Mixed or Details are Not Clear
Actions
1. Enable [CUTTING MENU]>[AUTO ENV.MATCH] in the User menu.
2. Set 0 in [CUTTING MENU]>[CALIBRATION]>[SCAN SETTING] and [FEED SETTING] in the User menu.
3. Perform [ADJUST BI-DIR] in the User menu.
4. Perform [PRINT-CUT ADJ.] in the User menu.
5. Prefeed the media to make it unrolled before starting a printing to decrease the back tension.
6. Decrease [SPEED] and [UP-SPEED] in [CUT CONFIG].
7. Divide the file into 2 or more and output them as separate jobs in order to make the feeding distance of each job shorter.
8. Use the crop marks.
9. Adjust the belt tension.
10. Clean or replace the Encoder Scale.
6-6