Calibration
The calibration procedure must be executed with the throttle mounted into its final position in the mechanism (or vehicle). If the actual arm amplitude is modified after calibration the system can present lack of dead-band, failure to reach full throttle, or insufficient sensitivity.
The throttle can be calibrated in two ways:
- Bidirectional operation: 100% to 100%
- Side-sided operation: 0% to 100%
Calibrating with Little CAN Calibrator Tool
Install the “Little Can Throttle Calibrator” and launch the application.
The calibration procedure requires the connection to the throttle via CAN, for that a PCAN dongle can be used to interface the computer and the throttle.
Once the application is launched, initialize the connection at the Baud rate the throttle is set to. If the throttle is new, most likely the Baud rate is set to either 250 kbps or 500 kbps.
On a bi-directional operation, a total of 6 setpoints are required, defining the dead-bands and proportional regions. In bi-directional mode the sensor accepts 3 calibration angles and will calculate a relative position between -100% and + 100%.
The next step requires access to the throttle actuator, preferably from a final system operator perspective.The figure below shows the 6 setpoints for calibration:
With the throttle lever held at its fully reversed position, lock the “Reverse 1” parameter by hitting the correspondent “Set To Current Throttle Value” button on the application.
Move and hold the lever to the position corresponding to the desired reverse dead-band, usually the thickness of a credit card between the fully reversed and the dead-band position is enough. Then hit the “Set To Current Throttle Value” button corresponding to “Reverse 2”.
Repeat the procedure for the neutral position and the forward position.
Calibration for single sided operation requires a total of four setpoints to be defined. Only the upper and lower dead-bands need to be defined. In single sided operation the sensor ignores the negative calibration angle and uses only the positive and neutral angles to generate a relative value between 0% and 100%.Any travel beyond the outer dead-bands will result in a fault
