[Konvas] off-topic -- motorized heads

[H. W. Stone]

 The people I have talked to recommend running it via a laptop-- not directly.? They also recommend MAC over PC, and that you use Firewire to connect it instead of USB2, but USB2 "will normally" work fairly well.? That apparently keeps the problems to a minimum, and allows you to upgrade joysticks, controllers, and store moves to use in different locations weeks later, too.


 


 

-----Original Message-----
From: Sean McVeigh <konvas at smallpony.ca>
To: Konvas Discussion List <cinema at konvas.org>
Sent: Thu, 11 Dec 2008 2:49 pm
Subject: [Konvas] off-topic -- motorized heads









I'm building a motorized pan head for a friend for xmas... was wondering 
if anyone has any experience with such equipment.  I'm using a stepper 
motor coupled through a worm gear to drive the plate... does anyone see 
any problem with a 0.025 degree/step (90as/step) final resolution on the 
output plate?  He mainly wants to use it for very slow pans and 
timelapse type work, so I think it'll probably be fine.?

I'm probably needlessly concerned, as I've maybe been paying too much 
attention to astrophotography-related websites while trying to spec it 
out, where the requirements are more like single-digit arc-seconds per step.?
?

Anyone want to recommend some features for such a head?  Since it's 
going to have a microcontroller brain, I can probably do things like 
re-play moves for green-screen matching.  Going to make it programmable 
off-line so that you could draw curves for it to follow.. heck could 
probably even take a dump from a tracker so you could match-move new 
shots for compositing.?
?

I guess next, he'll want a tilt head so he can stick the two together 
and plug a joystick into it :)  oh.. there's another feature!!  DB-15 
connector :)?
?

Cheers,?

Sean?
?

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