Encoded Slider Setup

An encoded slider can be handled very similarly to a Technocrane, with the boom extension axis being used to handle the slide.

The slider is set up with the same default position as the Technocrane — camera head level and square with the axis slider, and retracted to the left. As with the Technocrane, the survey is measured from the right side of the camera, as all remote heads have a right side pivot but some do not have a left side pivot.

3 survey markers are placed on the slider as above, that correspond to the boom pivot, the Mitchell head pivot, and the remote head pivot. As the slider has no elevation change, the Mitchell head pivot can be anywhere on the slider plate. A marker fixes this for repeatability.

The encoders are zeroed at this position, and the slider surveyed as before. The slider can then be moved to the furthest position to the right, and the extended Mitchell mount point surveyed. Since there is no droop in the slider, this is a bit redundant, but may be useful to determine the slider encoder count.

Encoded Slider in Operation

The slider data axes must be set up to correspond to the channel outputs of the Kuper controller connected to this, as with the Technocrane.

The method for locking the slider into the virtual environment, by measuring the northing/easting/elevation of the remote head pivot and adjusting the pan until the live action and CGI line up, is also identical to the process for the Technocrane.

Last Modified: July 21, 2014