Ricoh Beluga-C1 Training page 170

Slide 170
LED HEAD MISALIGNMENT
In the example on the slide, the LEDs in head 2 are not directly in line with those
in head 1.
A similar situation will occur between heads 2 and 3.
If there is an overlap at the joint, a black line will occur on the printout if both
overlapping LEDs are lit.
If there is a gap at the joint, a white line will occur on the printout between the
two pixels.
To counteract this, the power of the indicated LED can be adjusted. There are 32
possible power values between off and fully lit (at 10% power).
Note that the heads are physically joined together. This reduces the expansion
due to heat.
If the heads were not physically joined together, the gap between two pixels
would increase by 100 μm.
With the physical joints, the expansion is less than 20 μm.
For comparison, the gap between the dots is 42.3 μm.
LED Head Misalignment
LPH1
LPH1
Not lined up perfectly
The power of this LED
is adjusted
LPH3
LPH2
An overlap or a
LPH2
gap may occur
LPH2
Power adjusted
at joint
170
Beluga-C1/C1.5 Training