Adding a chock to the camera support system

September 15,  2008

Experience showed that the camera support system described in  Simple inexpensive tabletop camera support  was too simple. The vise had to be tightened inconveniently hard.  There was also a risk of the beam (and camera!) falling when the vise was loosened to adjust the beam angle.  A chock was added as shown below to support the beam in the vise, so that the vise needs to be tightened only sufficiently to eliminate wiggling of the beam.

The chock is a piece of wood,  3" x 1-1/2" x 3/4". Two 3/16" diameter carriage bolts pass through the jaws of the vise to pin the camera support beam and the chock to the vise. The bolts need no nuts. They are held firmly in place by the loads they support, and need to be easy to remove and replace to adjust the beam angle. The holes in the vise jaws were provided by the manufacturer of the vise to facilitate the attachment of wood facets to the jaws.  The two holes in the chock provide four angles of  beam elevation of which two are not very different , so there are three usefully distinct angles of beam elevation with the chock installed, and the horizontal position of the beam with the chock removed.


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