Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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9.17.6 Vertical image resolution
Name
Name
Vertical image resolution
Function
Define the desired transport (vertical) resolution for the encoder mode.
Channels
All
Unit
Float
Step:
0.01
DPI (dots per inch)
Dependency
Only available if
Encoder (Continue update)
is selected at
Synchronization
mode
.
Notes
This parameter is needed for the calculation of internal parameters for the
encoder mode.
Camera
Value CST
Lower limit
All
0
Default
All
4,000
(*0,01dpi)
NOTE
The value
Encoder pulses per line
is calculated internally by the camera and
may not exceed 255. Recommended values are between 0.5 and 255. Take
notice that values less than 0.5 cause a decrease in transport resolution
accuracy.
This value is automatically calculated with one of the following formulas by the user-
defined values in CST:
𝐸𝑛𝑐𝑜𝑑𝑒𝑟𝑃𝑢𝑙𝑠𝑒𝑠𝑃𝑒𝑟𝐿𝑖𝑛𝑒 =
𝐸𝑛𝑐𝑜𝑑𝑒𝑟𝐶ℎ𝑎𝑛𝑛𝑒𝑙 (
𝐸𝑑𝑔𝑒𝑠
𝑆𝑡𝑒𝑝
) ∗ 25,4 (
𝑚𝑚
𝑖𝑛𝑐ℎ
) ∗ 1000
𝐸𝑛𝑐𝑜𝑑𝑒𝑟𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (
µ𝑚
𝑆𝑡𝑒𝑝
) ∗ 𝑉𝑒𝑟𝑡𝑖𝑐𝑎𝑙𝐼𝑚𝑎𝑔𝑒𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛(
𝐷𝑜𝑡𝑠
𝑖𝑛𝑐ℎ
)
By using dots per inch (dpi) for this calculation, you have to use the following formula:
𝐸𝑛𝑐𝑜𝑑𝑒𝑟𝑃𝑢𝑙𝑠𝑒𝑠𝑃𝑒𝑟𝐿𝑖𝑛𝑒 = 𝐹𝑢𝑙𝑙𝐼𝑛𝑐𝑟𝑒𝑚𝑒𝑛𝑡𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛(𝑑𝑝𝑖) ∗
𝐸𝑑𝑔𝑒𝑠/𝑠𝑡𝑒𝑝
𝑇𝑟𝑎𝑛𝑠𝑝𝑜𝑟𝑡𝑅𝑒𝑠𝑢𝑙𝑢𝑡𝑖𝑜𝑛(𝑑𝑝𝑖)
The value for encoder pulses per line can also be calculated with the following formula:
𝐸𝑛𝑐𝑜𝑑𝑒𝑟𝑃𝑢𝑙𝑠𝑒𝑠𝑃𝑒𝑟𝐿𝑖𝑛𝑒 = 𝑇𝑟𝑎𝑛𝑠𝑝𝑜𝑟𝑡𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛 (
𝜇𝑚
𝑝𝑖𝑥𝑒𝑙
) ∗
𝐸𝑑𝑔𝑒𝑠/𝑠𝑡𝑒𝑝
𝐹𝑢𝑙𝑙𝐼𝑛𝑐𝑟𝑒𝑚𝑒𝑛𝑡𝑅𝑒𝑠𝑜𝑙𝑢𝑡𝑖𝑜𝑛(
𝜇𝑚
𝑖𝑛𝑐𝑟
)
Afterward, the result is shown:
NOTE
The resulting scanning speed should not exceed the max speed of the
camera. The setup of the
Vertical image resolution
and
Integration time
must match to the speed of the transport.
The time for one line (Speed divided by resolution) should be longer than the
shortest possible integration time (scanning speed is within the max. camera
speed). If the encoder setup requires higher speed than the max camera
speed, the camera switches to free-running line mode with maximum possible
speed.
For more information about encoder setup, see section 8.6
