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11.02 What is a PNC Calibration?
•
In order to get precise PNC results, you must tweak the camera
calibration. This is nothing more than
determining how far away the camera is located relative to the tip of the blade. Because the camera is
manually installed, the distance from the center of the camera to the tip of the blade will vary some from one
Force to the next. Also, you will want to use the same blade holder with all of your PNC applications, as the
distance might change with slight differences in the holders.
•
The distance is measured in an X direction and in a Y direction where X is how far right the center of the
camera is located relative to the blade tip. Then Y is how far forward the center of the camera is located
relative to the blade tip. Later in this tutorial, the location for entering these numbers will be shown.
•
The calibration process involves performing and repeating a PNC to see how much you need to adjust the
X
and
Y
values in order to get per
fect results. And you SHOULD be able to get perfect PNC’s!
11.03 Camera Calibration Procedure
11.03.1 What You Need for Calibrating
•
You need to be well rested! You don’t want to start learning the PNC process when you are tired, stressed,
or in a hurry. Mastering a PNC comes when you have the time to repeat it about 4 times in a row. At that
point, you will not only have repeated the process enough times to feel very comfortable with the order of
the steps, but you’ll have your calibration perfected and then be ready to do future PNC’s quickly and with
ease.
•
It is recommended that the
Resolution/Sizing Calibration
presented in
Section 2.07
be performed before
proceeding with the camera calibration.
•
Next, you will need the following items:
Printer
Blade holder
Copy/printer paper
in either Letter size (8.5” x 11”) or A4 (21 x 29.7 cm)
Calibration File available here:
http://www.iloveknk.com/FreeFiles/SVG/Force-Testing-and-Calibration-Files.zip
Important!
In order to facilitate the calibration process, please follow all instructions exactly. Later, after
calibration, you can change up methods, such as paper orientation and mat sizing, as desired.
11.03.2 Preparing the Calibration File
(1)
It is strongly recommended that you set the dimensions to match the paper size you’ll be using for the
calibration. Working closer to the origin of the Force reduces unnecessary movement that can introduce
factors which may affect accuracy. In the
Document
window, open the
Mat Size
drop down menu and
select either 8.5” x 11” or A4 (21 x 29.7cm):
(2) Next change the mat orientation, if needed, so that you are working in
Portrait
mode. Currently,
Landscape
mode doesn’t work for PNC on the Force. However, in order to use the diagram for adjusting calibration
settings, it is very important to use
Portrait
. Your settings should now look like this:
Choose the paper size to match
what you will use for printing.
Click here to open
Document
window
Summary of Contents for KNK Force
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