MTS SWIFT 20 Ultra Sensor - Manual (Page 87)

Test Track Vehicle for Slip Ring Sensor
SWIFT 20 Sensors Installing the Transducer 87
This zero method samples all eight input bridges on every encoder tick, for one
complete revolution. After the data is taken, all eight input channels are analyzed
for signal offsets, and the X and Z input channels are analyzed to determine the
angular zero point.
Example of a .cal file
If Zero Algorithm=4
When you zero the TI, you want the vehicle to be fairly level and the transducer
to be as close to plumb as practical.
1. Install the SWIFT sensor(s) and data collection equipment on the vehicle.
2. Connect all cables and turn on the power to the TI boxes.
3. Let the TI boxes and transducers warm up for 15-20 minutes.
4. Run the TISTATUS program to compare the supply voltages to the
reference voltages.
Type: TIstatus <port#> <box#>
If the supply voltages vary more than 0.5 V from the reference voltages,
there is a power supply problem that must be resolved before you can
continue.
5. Verify that the calibration file is set up correctly for your testing application.
[SWIFT]
Name=zero 3 after new tire
SerialNum=1234567
Normalization=0
InputSwitches=255
OutputPolarities=40
ZeroAlgorithm=4
AngleMode=0
AngleOffset=82.0898
AngleFixed=0
EncoderSize=1
ZFX1=0.103786
ZFX2=-0.023199
ZFY1=-0.094017
ZFY2=-0.184371
ZFY3=-0.225885
ZFY4=-0.269841
ZFZ1=-0.101343
ZFZ2=-0.045177
KFX1=0.196337
KFX2=0.195604
KFY1=0.169231
KFY2=0.166789
KFY3=0.167277
KFY4=0.16801
KFZ1=0.195849
KFZ2=0.196581
KMX=3.7558
KMYX=2.39805
KMYZ=2.5641
KMZ=3.75824
KFXFY=0.000611
KFXFZ=-0.00315
KFXMX=0.008864
KFXMY=-0.005348
KFXMZ= 0017998
S20-38
Zero Algorithm
0 Non-spinning mode
1 Spinning mode (uses a digital
inclinometer for angle zero and
spinning the tire for the bridge zero
process
2 Not used
3 Spinning mode (uses spinning the
tire for both angle and bridge
processes)
4 Spinning mode (use a digital
inclinometer to define two positions
90° apart for the bridge zero and
angle zero processes.
Angle Mode
0 Spinning mode (obtains angle from
the encoder)
1 Fixed angle mode (used for test rigs
in the lab)