Instruction I
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Wizard - 12 Servo Travel Calibration
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Servo Travel Calibration
Troubleshooting:
Q. I am having trouble getting the servo to move when I adjust the potentiometer.
A1. Reset the Servo Lower and Upper Limit Ranges:
Temporarily short JP1 pin pain set or JP2 pin pair set by placing a jumper onto the pin pair for a
few seconds, then remove the jumper.
A2. Check to see that the Potentiometer has been wired correctly to the control board
terminal block. Wires +, - and W. Does the Wizard-12 board have power?
A3. Check to see if the servo is designed to move only a set amount (See servo
information specifications from manufacture on servo)
Connect a potentiometer, servo and power supply to the Wizard-12
controller board.
Adjusting the potentiometer will control the position of the attached servo.
The full range of the potentiometer and board electronics will generate
pulse width equivalent to a 180-degree servo movement. (1ms - 2ms)
Some servos will not accommodate this movement range. so take care
not to drive the servo into its limit stops at the extreme setting range.
Servo Travel Servo
Travel
JP1 JP1
Upper Servo
Travel Range
Setting the Servo Movement / Travel Range
Upper Limit Range:
Adjust the potentiometer and move the servo output
travel to the upper range point that you want the servo
to stop at. Temporarily short the JP1 pin pair set by
placing the jumper onto the pin pair for a few seconds,
then remove the jumper. This will record in memory the upper movement
travel range limit. This setting will be retained even after the power is turned
off, and will stay in memory until manually reset to a new range.
Lower Limit Range:
Adjust the potentiometer and move the servo output travel to the lower range
point that you want the servo to stop at.
Temporarily short the JP2 pin pair set by placing the jumper onto the pin pair
for a few seconds, then remove the jumper.
This will record in memory the upper movement travel range limit. This setting
will be retained even after the power is turned off, and will stay in memory until
manually reset to a new range. JP2 JP2
Lower Servo
Travel Range
JP2 JP1
JP1
-OR-
JP2
To RESET the Servo Lower and Upper Travel Limit Ranges:
Temporarily short JP1 pin pair set or JP2 pin pair set by placing a jumper onto
the pin pair for a few seconds, then remove the jumper. This will reset the servo
movement travel limit values recorded in memory to a 0 value allowing the servo
to move the full travel range of the servo.
(Note: some servos move only small travel ranges, as manufactured. For max
travel, select a servo that has the desired travel ranges you need)
Note: If the servo does not move as the potentiometer is adjusted, it may be that the upper and
lower limit travel ranges are overlapping. Try re setting the limits again or RESET the limit settings and
start again with the servo limits
Wiz-12
Potentiometer
RESET
