Robotronics Vehicle Robot, Operating Manual

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CHAPTER 11 Eyelids and Eyes Left and Right
The eyelid and eyes left and right movement is accomplished by three servo motors in the
Character or upper robot. When the switch on the radio control is activated, this signal is sent
to the radio control receiver in the robot. The micro-processor in the robot decodes this signal
and a new signal is sent to the eyes servo board. The eyes servo board is located on the
underside of the top of the robot. To see it, the top would need to be removed and the top
turned on its side. The wires connected to this board take the signal to the servo itself and
operate the shaft of the servo motor to turn clockwise or counter-clockwise for opening or
closing. The rotation of the servo motor shaft is coupled to the eyelid and eyeballs with a servo
arm and then an eyelid rod.
Troubleshooting - Eyes
An eyelid or the eyes left and right does not operate:
•
Linkage problem. Check the linkage from the servo motor. Look for the servo arm off the
servo shaft or the ball link off the eyelid. Put the servo arm back on and get a set screw to
hold it on.
•
Wire broken. Follow the wires from the specific servo motor with the problem. The wire will
run to the eye servo board. If it is disconnected, reconnect according to the eye servo board
diagram. If the servo does not work correctly (wrong direction), try one of the other outputs
on the eye servo board. See the diagram showing the eye servo board on the next page.
•
Bad servo. Replace the servo motor.
One of the eyelids is at a different level than the other:
•
Bent rod. If the eyelid rod is bent, bend it back into position or replace the threaded rod.
•
Adjust the level. The eyelid can be positioned to match the other eyelid. To remove the
servo saver arm, the set screw must be removed. The eyelid level can be changed by
altering the length of the eyelid rod or changing the position of the servo saver arm on the
servo motor shaft.
There is no operation of any of the eye functions:
•
Five pin wire disconnected, broken or in the wrong place. The wires that bring the
signal to the eyes servo board are gray and yellow. 5 Volts power is the black and red wires
that connect to the eyes servo board. You can check for 5 Volts here. If these wires are
connected, follow them back to the board that they originate. Typically these wires go to the
Servo Arm Assembly
Futaba Servo Motor
4-40 Ball Link
Set Screw
(M2.5 x .45 x 8mm Phillips Pan
Head Machine Screw)
4-40 All Thread Rod
Large Vehicle Eyes Parts