It is crucial that a Radian module has it's orientation set correctly to stabilise an axis on a camera mount. If it is not it will do strange things on initialisation and most likely end up shutting the motor drive off (giving a slow flashing green LED). This is how you can check a Radian is configured properly: 1) Disconnect the servo from the Radian 2) Power up the Radian and connect it to the PC software as normal 3) Click the 'Connect' button and check the slew bar has gone green as normal. 4) In the Radian software 'Configuration' window you will see a box with 'Current-Angle-Demand' as the title. 5) Watch the value under 'Current'. It should change as you rotate the Radian axis by hand. You need to check that: It goes more positive when you rotate the axis nose-up (Tilt), roll-to-the-right (Roll) or clockwise (Pan) And of course more negative in the opposite direction. The angle shown is the actual angle in degrees - so check it is roughly correct (for example you move it 30 degrees and it does not show 2 or something like that).