DIY Motorized Pan/Tilt/Dolly HDSLR Video Mount (Camera Slider)

Update September 2013:  What started as a hobby has turned into something pretty serious.  We are readying the launch of an open-source cinematic motion-control rig.  If you wanna stay up on the futue of cinematography "like" us at https://www.facebook.com/openmoco

UPDATES TO FOLLOW
 

2 Sets of Roller Blades (16 wheels/32 ball bearings) from Goodwill
www.flickr.com/photos/bradjustinen/5882721666/in/photostream

Aluminum angle

All thread

nuts/washers

Meade motorized telescope arm

Some sort of metal rail



I usually move the dolly by hand but for time lapse or slow movement I use a parallax continuous rotation servo that winds fishing line through a pulley attached to the dolly and onto a small spindle. I control the servo via a Traxxas (for a remote control car) controller and receiver. The Traxxas controller has a potentiometer on it that allows speed control of the servo in both directions. An easier option would be a rotisserie motor - I found one at Goodwill but didn't wind up using it cause I wanted to go wireless.

Give credit where credit is due, this project is a remix of these two projects:
 DIY video & timelaps electrical dolly
http://vimeo.com/9179128
 DIY Inexpensive Camera Slider
http://www.vimeo.com/15891760