Aerobatics(at)aol.com
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 Posted: Sun Jun 25, 2006 7:02 pm Post subject: Camera Mount (was) tires Servos... |
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In a message dated 6/25/2006 9:44:37 P.M. Central Daylight Time, lcfitt(at)sbcglobal.net writes:
| Quote: | Thanks for the "horrible" report, but you really don't know what you are
talking about and the only way you will change my mind is to make one, shoot
some video and let me see it.
Actually, I have experimented with servos and with the budget I have and
what is out there - they don't work. I talked to a guy over the weekend
that is working on a still camera system and for that they will work fine,
for video, even with 5 pole digital servos you will see the pulse of the
step movement in a slow pan. I guess you can essentially filter this out
with stabilizing gyros, but then you are talking some bucks.
Being always willing to learn something new - do prove me wrong. If you
work for the government on secret weapons systems all bets are off, but if
you can prove me wrong with common off the shelf servos, I am all ears -
eyes.
Lowell
----- Original Message -----
Sent: Friday, June 23, 2006 12:40 AM
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Actually that's what I do for a living....radio control... here are a few ideas.
Do not use pole motor servos, use coreless, and a quality one at that. For camera panning, I would think torque is better than speed. At least 150 inch ounces. You can now get servos well over 300 inch ounces. If you choose Hitec, buy the programmer and set dead band to min. Another thing, try not get a huge amount of sweep of camera, but set max throws on servos. This is a very common mistake. Set throws to 150% each way. This alone will make a dramatic difference.
Having never done it, I still think it can work.
Friction is a big no no. That will make the panning sticky.....
Call me if you need some help
Dave
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