Sabtu, 07 Maret 2015

HEIDELBERG GTO 52 / 52 Z / 52 V ADJUSTMENT OF PRESSURE BETWEEN BLANKET AND IMPRESSION CYLINDER


Adjustment of pressure between blanket and impression cylinder
is done by one each knurled knob (ill. 6/19). Settings are shown on graduated scales (ill. 37/3)
 Method of adjustment:
Deduct 0.1 mm (.004”) from the thickness of the stock to be printed and set both scales to this value (ill. 28/3). (0.1 mm = .004” is the pressure required.) (Observe: Measure paper thickness by means of micrometer or other suitable thickness gauge, the grammage of the paper does not indicated a true thickness.)

 
Example I
 
Carton 0.4 mm (.016”) thick, offset plate
0.10 mm (.004”) thick, blanket with
underlay level with bearer
Cardboard                             0.40 mm (.016”)
-pressure                               0.10 mm (.004”)



                                            + 0.30 mm (.012”)  
The pressure indicators have to be
 adjusted to face the black number
 0.3 Thus, the blanket cylinder is -0.3
 mm (.012”) of its zero-position.
(From impression cylinder.)
 
 
 
Paper 0.05 mm (.002”) thick, offset
plate 0.10 mm (.004”) thick,
blanket and underlay level with bearer
Paper                                  0.05 mm (.002”)
-pressure                            0.10 mm (.004”)
 
 
                                         - 0.05 mm (.002”)
Pressure indicators face the red
 number + 0.05. Blanket cylinder
 is + 0.05 mm (.002”) off its
zero-position.
 (Towards impression cylinder.)
Example II
 
Carton 0.4 mm (.016”) thick, offset
plate 0.15 mm (.006”) thick,
blanket and underlays 0.05 mm
 (.002”) below bearer
Cardboard                         0.40 mm (.016”)
-pressure                           0.10 mm (.004”)
-blanket below bearer    0.05 mm (.002”)
 
 
                                        + 0.25 mm (.010”)
Pressure indicators facing the black
number – 0.25.  Blanket cylinder is
0.25 mm (.010”) of its zero-position.
(From impression cylinder.)
 
 
 
Paper 0.05 mm (.002”) thick, offset
plate 0.15 mm (.006”) thick,
blanket and underlay 0.05 mm
(.002”) below bearer
Paper                                    0.05 mm (.002”)
-pressure                             0.10 mm (.004”)
-blanket below paper        0.05 mm (.002”)
 
 
-0.10 mm (.004”)
Pressure indicators face the red number
 + 0.10. Blanket cylinder is + 0.10 mm
 (.004”) off its zero-position.
(Towards impression cylinder.)
BY : BERKAH MANDIRI MESINDO
 

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