MASTER MAKING SECTION
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2. Master Feeding Adjustments
1) Master cut position adjustment
This adjustment sets the master cutting timing (print drum stop position for cutting).
Checks and adjustment
(1) Adjust if the tail end of the master mounted on the print drum is either too long or too short.
(2) Run the Test Mode No. 284 and adjust.
* Increasing the settings increases the length of each master.
2) Master clamp range adjustment
Adjust the master clamp range when it is mounted.
Checks and adjustment
(1) Make a normal and confidential master, and then check
the length of the master protruding from the clamp magnet
plate.
If the amount protruding is within 2 mm ±2 mm, it is
normal. If it is outside this range, adjust as shown below.
(2) Run the Test Mode No. 283 and adjust.
* Increasing the settings increases the amount of protrusion.
Note:
The relative positioning of already-made masters wound onto the print drum will change if the clamp
range is adjusted. The master scanning start position must therefore be readjusted, and it must also be
confirmed that the vertical printing position adjustment is correct.
3-1) Master making image elongation & shrink-
age adjustment (RN25 Series)
Adjust the write pulse motor speed for master making.
Checks and adjustment
(1) Run the Test Mode No. 051 Test Print (Cross stripes), and
produce an actual print.
Adjustment is correct if the length and width of the blocks
are the same, making each block a square. (Check by
folding paper and illuminating from behind.)
If it is not correct, adjust as shown below.
(2) Run the Test Mode No. 287 and adjust.
Note:
The scanning volume and vertical printing position must be
readjusted after adjusting the elongation and shrinkage.
Clamp magnet plate
Master
2 ± 2 mm
a = b
A = B
Fold the paper
A
B
a
b
Summary of Contents for RP-255
Page 22: ...MAINTENANCE 1 9 NOTE...
Page 27: ...MAINTENANCE 1 14 MEMO...
Page 45: ...MACHINE SUMMARY 2 8 Memo...
Page 50: ...MAIN DRIVE SECTION 3 5 Memo...
Page 83: ...FIRST PAPER FEED SECTION 4 26 Memo...
Page 108: ...PRESS SECTION 6 9 Memo...
Page 111: ...PRESS SECTION 6 12 Memo...
Page 169: ...PRINT DRUM SECTION 8 30 Memo...
Page 197: ...FB ORIGINAL SCANNING SECTION 11 2 Memo...
Page 213: ...FB ORIGINAL SCANNING SECTION 12 2 Memo...
Page 222: ...FB ORIGINAL SCANNING SECTION 12 11 Memo...
Page 271: ...AF SCANNING SECTION RN20 21 Series 14 18 Memo...
Page 295: ...MASTER MAKING SECTION 15 24...
Page 303: ...TIMING CHARTS 16 8 Memo...
Page 399: ...TEST MODE 18 32 Memo...
Page 405: ...MISCELLANEOUS PRECAUTIONS 19 6 Memo...
Page 423: ...ELECTRICAL DIAGRAMS RN25 Series 20 18 Memo...
Page 439: ...RISO Inc Technical Services Support US RISO COM ELECTRICAL DIAGRAMS RN20 21 Series 21 16 Memo...
Page 441: ...ELECTRICAL COMPONENTS 22 2 O A B C D E F G H I J K L M N 2201 2202 1 Motors...
Page 443: ...ELECTRICAL COMPONENTS 22 4 A B C D E 2203 2204 2 Fans Solenoids Electromagnetic Clutch...