Friday, March 18, 2005

Fw: dolly



http://www.microdolly.com/
http://www.general-lift.com/
http://hometown.aol.com/mckarp/
http://www.mrmoco.com/
http://spydercam.com/
http://www.fxwest.com/
http://www.moog.com/electrif/electrifying.htm/
http://www.mo-sys.com/


http://www.lathemaster.com/ROTARYTABLESET.htm



RE: Home-brewed Geared Camera Heads for Stop Mo?
Mon Mar-03-03 01:56 PM


In response to Reply # 15



Hey everybody!

Sorry for the delay but I am happily writing this month from my source of
all mojo in Prague. It's the first time I've been here since 9-11, so I am
stoked, to say the least.

Anyway, to business. The students that use my Bogen head dealio place tape
on the head with marked off increments at the posistion indicator for each
axis. You know, the little round areas with the dot for a "pointer". It is
far from luxurious, but it gets the job done. I know the heads don't allow
for nodal adjustments, but considering the environment they are used in,
it is not an issue. The "keystoning" that occurs with the image is
certainly undesireable, but I had to weigh the cost effectivness of an
off-the-shelf finished and durable pan/tilt head against the desire and
experience of first-time animators. Otherwise, the finished rig would be
difficult to produce for a reasonable price. Anyway, while thinking out
the design of this rig, I came up with a plan to use two rotary tables to
create a pan/tilt head that was more to specs with our needs. A beautiful
4" rotary table is avaiable from Sherline products. It costs $250.00, but
is is a nice solid American made table. For $650.00, you can get it rigged
with a step motor and controller. I use one for table-top commercial jobs
and it's the Bees knees. It would take some imagination to work out eases
with the controller, but it can be done. Sherline now offers a linear
controller as well, but I have yet to get my hands on it. It is a few
notches down on my priority list from drinking beer in Prague, so perhaps
now that I'm getting that settled, I can think about some new toys in the
future. I can't afford a whole motion-control system, but the Sherline
product offers a great solution to simpler set-ups (they can be linked
together) Anyway, the Sherline tables come drilled and tapped for mounting
to thier various acessories, so all you have to do is locate the holes on
some plate stock and bolt or weld it at right angles (or use a monster
chunk of aluminum angle stock if you have it) and you're ready to rock and
roll. You might try making the holes for the table mounts elongated so you
can tune the nodal point by sliding the respective plates back and forth
as needed.

So, I hope that helps. I'll be out and about in my beloved city but I'll
check back when I can. Na stravi!

Cauki!

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