Features Of The Risograph Gr3770 - Riso GR 3770 Technical Manual

2. FEATURES OF THE RISOGRAPH GR3770

This chapter mainly describes technical features. As for advantages concerning business operation, see the
documents issued by Sales Dept.
The GR3770 is a new type of the GR3750 for which 600dpi has been realized.
Special features of the GR3770 are as follows:
• HIGH-PRECISION IMAGE ACHIEVED BY RESOLUTION OF 600dpi
• Adoption of Optical Image Scanner
• Due to increased size of the image scanner, it is fixed for shipment.
⇒ For release, shift the fixing metal and execute Tst Mode No.133. (The instruction sheet is attached to the
machine.)
• Due to increased size of the image scanner, the FB original detection sensor is hidden in FB/HP sensor
position. Therefore, the image scanner is shifted for detection of an original copy.
• ADOPTION OF HIGH-DENSITY INK/DEDICATED MASTER
• Use of High-Density Ink (HD ink) Developed to Achieve 600dpi Performance.
• A special drum dedicated to the GR3770 is mounted which is applicable to the HD ink bottle. (The ink bottle
set SW is added.)
• The Clamp gear has been increased in strength to meet the change in the clamp unit.
• Although the present color drum is useable, the clamp plate base needs to be changed because of the
abovementioned grounds.
• Use of Dedicated Master (77W) Developed to Achieve 600dpi Performance.
• Master roll diameter has been increased due to looser winding in comparison with the present master
(76W).
• Master flange size has been increased (due to the above ground.)
• INCREASE IN PHOTO IMAGE REPRODUCIBILITY THROUGH USE OF CONTRAST ENHANCE MODE
• As against the adjustment in γ compensation which was available with the image processing PCB,
adjustment in two stages (three stages if including "Normal") has been made available at the users' level.
• REDUCTION IN MASTER-MAKING TIME THROUGH USE OF BOOK MODE
• Pre-scanning has been eliminated through use of realtime trimming.
(However, the overall master-making time was increased due to adoption of 600dpi.)
• CLAMPING WORK STABILIZED AS CLAMP UNIT HAS BEEN CHANGED
• The clamp unit UP & Down movement can be also drived by rotation of the clamp motor as well as
opening/closing movement of clamp plate.
• "T14" is not displayed even if the clamp unit is lowered manually.
• Mounting on the present models has not been enabled as yet.
• OTHERS
• The original stage glass and the original stopper are each independently provided.
• The write pulse motor is adjustable in speed.
• Applicable to New Computer I/F Rev.5.xx. (Not applicable to Rev.4xx.)
• Applicable to New Sorter I/F specification. (Not applicable to the former Sorter specification.)
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MACHINE SUMMARY
FEATURES
GR3770