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360degree continuous rotation modification

clickPAN products use servos that have been modified for 360 or continuous rotation. There is a full list of modification methods on the kaper website. Method 3 (and 4) are the methods commonly used, and can be used by clickPAN. This page details the modification to the servo can be used. I have used the same names as the kaper reference:

NOTE: When the rotational speed is reduced individual pulses or steps in the motor become more noticeable. Our tests conclude that whilst this looks disconcerting, any effect they have is dampened out by the suspension system. This is not the limiting factor is positioning the camera.

Method 3

Image Credited to David Hunt - kaperAs shown left the servo is opened and the feedback potentiometer is cut out and discarded.

Image Credited to David Hunt - kaperA 5Kohm cermet trimmer replaces the potentiometer. 

Depending on the exact layout inside the servo it may be appropriate to use a vertical or horizontal device. 

It is also preferable (but not essential) that you can adjust the potentiometer through a hole in the outer case of the servo.

Make sure that the center pin of the cermet is connected to what was the center pin of the original potentiometer.

Image Credited to David Hunt - kaper
The diagram left shows one possible orientation of the potentiometer.

Image Credited to David Hunt - kaperFinally check the gearing and mechanism for any "stops" to prevent rotation beyond the normal 90. Remove as necessary.

Again this detail varies from servo to servo.


Method 4

Image Credited to David Hunt - kaperMethod 4 is similar is concept to Method 3. This time, instead of replacing the feedback potentiometer electrically, the existing potentiometer is disconnected mechanically, but left in circuit.

The gear in the red square is modified to remove the plastic cross in the center. When this is done the rotation of the gear no longer rotates the potentiometer (the brass post at the right of the servo block).

Image Credited to David Hunt - kaperThe diagram to the right shows how this is done (white area drilled out). 

Image Credited to David Hunt - kaperAs for Method 3 check the gearing and mechanism for any "stops" to prevent rotation beyond the normal 90. Remove as necessary.

Again this detail varies from servo to servo.

Thanks to David Hunt and www.kaper.us for the material used here. So far you may have done this work already, read on to the next section to see what you have to do additionally to use antiCREEP.

Calibration of gent360-PAN

With both these methods the cermet and potentiometer are normally adjusted roughly to stop rotation with the transmitter stick in the neutral position. With antiCREEP these adjustments have to be made more accurately.

The antiCREEP has a built-in calibration mode which you only need to use once for each modified servo.

By connecting antiCREEP directly between a battery and the servo you then adjust the cermet, or the potentiometer, in the servo to stop rotation. Once this is done you don't need to adjust the servo again, simply connect the antiCREEP in series with the servo lead between the RC receiver and the pan servo.

Full instructions are included with the device when ordered. 

90 & 180 Servo Suitability

moreTILT is designed to extent the rotation of a standard servo. In the mode that does this to a full 180 some non standard servos will not work. Note we are not talking about servos that have been modified for continuous or 360 operation!

This section allows you to check if the servo is suitable for 180 operation.

  1. Take the servo and add a standard plastic fitting to the drive so that you can apply some purchase with your fingers.

  2. With the servo unpowered apply pressure and rotate the output slowly. Inside the device there are mechanical stops and you should feel increased pressure when you reach the end. Note this point and rotate back to find the other stop. 

These points will be 200 apart in a standard servo, if not do not use moreTILT.

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