CAB Hermes C 6L, Service Manual

27

5 Adjustments

5.4.4 

Adjusting the Transfer Ribbon Feed Path

You can adjust the transfer ribbon feed path by changing the head contact pressure and adjusting the transfer ribbon 

deflection (2). Increasing the head contact pressure with the screws (3a) and (3b) shifts the ribbon feed path in the 

corresponding direction. The skew of the transfer ribbon deflection is used to suppress wrinkles in the transfer ribbon 

feed path. Wrinkles which cannot be remedied with the skew of the transfer ribbon deflection can be suppressed by 

bowing the printhead.

!

Attention!

The printhead assembly can be damaged when bowing the printhead.

Turning the adjustment screw (4) too hard can cause damage to the printhead assembly.



As soon as you perceive clear resistance when turning the adjustment screw (4), you may only continue 
turning the screw in very small increments, but no more than one eighth of a turn.

Only turn the adjustment screw (4) as far as is absolutely necessary. 

1

2

3a

3a

4

Figure 28  Adjusting the transfer ribbon feed path

1.  Check the transfer ribbon feed path. 

The wound up ribbon should be the same distance from the disk of the winder as the supply roll is from the disk of 
the supply hub.

2.  If the ribbon runs inward or outward, turn the corresponding screw (3a) or (3b) clockwise in small increments. Wait 

until the ribbon feed path has stabilized after each step of the adjustment.

3.  Check the ribbon feed path for wrinkles.

4.  If wrinkles arise on the inside, turn the screw (1) counterclockwise. If wrinkles arise on the outside, turn the screw 

(1) clockwise.

5.  If the wrinkles cannot be remedied (e.g. wrinkles in the center), turn the adjustment screw (4) clockwise  

with extreme care

 using an Allen key (1.5 mm) and observe the ribbon feed path. 

When the adjustment screw (4) is tightened, the printhead is bent downward slightly in the center. It is possible 
that a slight lightening at the edge areas of the print image could occur here.

6.  If bowing is not necessary, turn the screw (4) clockwise until the screw is just barely clamping.

7. 

When the transfer ribbon feed path is set, continue with the final test.

5.4.5 

Final Test



Load transfer ribbon in both print units.



Reset the 

Heat level

 to 0 in the printer configuration 



 Configuration Manual.



Recheck the setting with the test function 

Test grid

 (



 Configuration Manual) or a similar print pattern.



If there are differences between the print positions of the two print units in the feed direction adjust the parameter 

Offset upper-lower head



 Configuration Manual.

When using standard cab media, the test printout must show lines with sharp contours and black areas without any 
parts missing.