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HelicopterAerial Photography and Video › Camera Mount Stabilization?
05-02-2004 10:12 PM  13 years agoPost 1
Chuckfly

rrNovice

Queenstown, New Zealand

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Hi Heli nuts.

I am looking for a way to gyro stabilize the camera mount (Airfoil) on my Bergen Twin, so as to be able to keep my video shots level & keep the camera pointing at a fixed point while the heli moves around.

I am familiar with the Carvec system but quake at the price.

What else is there out there?

Has anyone experimented with heading hold gyros to achieve this?

Another question.
Airfoil sell a mechanical gyro to fit to their mount.
Exactly what does this do & how well does it work?
I'm assuming that the gyro helps keep the mount aligned vertically during flying manoevres instead of swinging like a pendulum, is this right?

Another question
I'm looking for the best way to control the Pan & Tilt of the mount in a smooth way especially when changing direction of the Pan without getting a sharp change of direction. I'm currently using a Servo Slow module between the Rx & servos which gives good smooth pans once moving but the mount still moves too fast during the initial stick input.
What is out there that may help?

Thanks All.
Chuck

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05-03-2004 06:27 AM  13 years agoPost 2
Joojoo

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Gainesville, FL

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Chuckfly,

I don't know if this would be applicable to your system, but I've had some success using exponential to slow the initial servo motion. My pan-tilt mounts so far have relied on a geared or direct-drive hacked servo to control the camera motion. If you use 70% or more of exponential with a fairly low end point, you can achieve nice, slow starts around neutral. I've tested this approach on various testbeds, and it seems to work reasonably well.

If you're using stock servos (i.e. commanding position as opposed to speed), this will only work around the neutral point.

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05-03-2004 09:28 AM  13 years agoPost 3
Chuckfly

rrNovice

Queenstown, New Zealand

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Thanks Joojoo
Yep, the Exponential trick does help, especially around neutral. I have seen somewhere a gadget that commands servo speed in relation to stick position as opposed to the usual servo position vs stick position.
Anyone what this gadget is?
Chuck

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05-03-2004 12:35 PM  13 years agoPost 4
ImRich

rrVeteran

Derry, NH USA

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Hi Chuck,

I have some thoughts about this myself. I didn't want to let the cat out of the bag until I had some time to do some testing which I haven't done yet.

I saw your reply to Malorie, but I'm not sure why there has been no more work on her system for over a year considering that she said it was a priority for her. I had lost track of that. Funny how that happens!

---
Rich

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05-03-2004 04:05 PM  13 years agoPost 5
RC-CAM

rrApprentice

USA

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I have seen somewhere a gadget that commands servo speed in relation to stick position as opposed to the usual servo position vs stick position.
RC-CAM's PanCam Project

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05-03-2004 10:11 PM  13 years agoPost 6
Chuckfly

rrNovice

Queenstown, New Zealand

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Cheers for the PanCam info. Very informative website & just the thing I'm looking for.
Are these units (or similar) available as finished items ready to install?
As yet I don't have the technology (knowhow) to burn PIC code etc, so am looking for a quick easy result.
Thanks Chuck

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