Calibration of sensors
The sensors have been pre-calibrated and unless you make changes to the mechanics or the gears
have missed a step due to excessive force, a re-calibration is not necessary.
The Satran MK2 uses two linear 1K potentiometers as sensors to read its current position. The
max/min values of these need to be calibrated in order to give a high accuracy. The rotator accepts
potentiometer range of 25 - 999. A reading lower than 25 probably indicates that the control board
has lost the connection to the sensor, in that case check your cables.
1)
Mount the rotator correctly and
power it up. Wait a few seconds for
the device to initialize.
2)
If the device has not yet been setup
and connected to you WLAN,
connect your computer or smartphone
directly to the Satran Access Point
(hostname starting with
”SATRAN_”).
3)
When connected, open a web
browser window and enter
http://192.168.4.1/calibration
into the
URL field if accessing it directly on
the access point, or replace the IP-
address with the one assigned to it
by your wireless router.
4)
Click to turn the azimuth counter-clockwise until it reads approx 100-150. This number will be
the north end position (0 degrees). Enter this value in the corresponding field and press save button.
5)
Take a pen or piece of tape and make a marking on both the bottom fixed turntable and the top
rotator housing that should line up with each other.
6)
Press the ”Azimuth CW” button repeatedly to turn the azimuth a full 360-degree turn until the
markings you made lines up again. Enter this new azimuth reading into the corresponding ”azimuth
max”-field and press save. Remove the markings/tape on the rotator if you like.
7)
Continue by repeatedly pressing ”Elevation down” button until the top antenna bracket is
perfectly horizontal. Enter the elevation reading into the corresponding ”Elevation min”-field and
save.
8)
Press ”Elevation up” until the antenna bracket is perfectly vertical and enter the reading as the
”elevation maximum”, press to save settings.
Now calibration is finished and you can continue with the regular setup.
2022-03-28
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