Page 13 of 25 FA69372–2 English
Jun 2013
25
How To Install and Set Up the 5900 &
7900 Printer
Linx 5900 & 7900
In this example, the required raster pitch is 0.378 mm. You can use a standard Linx encoder
and wheel to try to match this value.
Figure 11. Calculate the Pitch Factor: example
The actual raster pitch in Try 3 is acceptable because the value is close to the required raster
pitch. Also the required raster pitch is the maximum. You can use a 5000 p.p.r. encoder and
a 200-millimetre wheel. The pitch factor is 9.
You can see that when the encoder p.p.r. is greater, the actual raster pitch is closer to the
required pitch. If the encoder p.p.r. is greater, you can adjust the required pitch, but the
encoder cost is higher and the maximum print speed can decrease.
Step 3: Check the calculated print performance
If there is any difference between the required raster pitch and the actual raster pitch, the
print performance can decrease. You must also consider the maximum frequency of the
encoder signal.
For this step, you must perform the following steps:
1 Calculate the length of the printed message:
Number of Rasters (step 1) x Actual Raster Pitch (step 2)
2 Calculate the maximum print speed for the message type
Actual Raster Pitch (step 2) x Raster Rate* (kHz)
* The raster rate depends on the printhead type and the message type—see the
table on page 20.
To make sure that the print quality is acceptable, the maximum print speed must be
greater than the line speed. If necessary, select a message type that has a higher
raster rate.
3 Calculate the maximum encoder speed:
Encoder Pitch (Figure 9) x Maximum Signal Frequency (kHz)
NOTE: The maximum signal frequency for Linx standard encoders is 80 kHz.
4 Compare the maximum line speed with the maximum encoder speed.
If the maximum line speed is not less than the maximum encoder speed, repeat the
selection process.
$&#"!
Encoder/Gearing
Encoder Pitch x Pitch Factor = Actual Raster
Pitch
Try 1
2500 p.p.r./200 mm 0.080 mm 4 0.32 mm
Too Low
Try 2
2500 p.p.r./200 mm 0.080 mm 5 0.40 mm
Too High
Try 3
5000 p.p.r./200 mm 0.040 mm 9 0.36 mm
To Next Page
Loading...
