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Post by Valkman on Jun 29, 2012 14:38:12 GMT -4
As some of you may know I am building my own AP ship. It is by no means finished but today I got the gimbal moving and recorded it with my phone. I was not planning on putting it up if I did I would have used the good camera. The Gimbal I made myself from carbon fiber sheets ( about 60 dollars all in ) and bits of heli's I have lying around. I will put up more details and better video/pics another time if anyone is interested.
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Post by Chris Reibert on Jun 29, 2012 14:47:14 GMT -4
That is freaking Cool Joe!
So does someone operate the camera and gimbals as you fly? It has got to be a two person job right?
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Post by Valkman on Jun 29, 2012 15:03:47 GMT -4
I will see! The idea is to have a second person it's a big enough job to fly the thing. I suppose basic shots like buildings at low level I could manage myself just take hundreds of pictures and pick the best lol. Here is a pic of the screen attached to an old camera tripod. I stuck the download link to the back of the screen. Both operate at 12v so I velco a 450 battery pack to the leg and that powers both. The screen cost 29 euro. 5.8g 200mw FPV Wireless AV Tx & Rx Set cost 63 dollars and a 9c tx/rx 54 dollars. I will do a full list another time with prices where to buy etc. Attachments:
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Post by Valkman on Jun 29, 2012 15:04:15 GMT -4
The back Attachments:
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Post by sgmason on Jun 29, 2012 15:21:52 GMT -4
So what do you think of the 9X?
Really cool build on the gimble, it looks to be smooth as warm butter
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Post by Dr. Evil on Jun 29, 2012 18:03:10 GMT -4
That is so cool! How would the weight come in play with most is now in the front I guess? BTW, love those shocks...looks like from a RC car? Good job mate!
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Post by Valkman on Jun 30, 2012 5:53:35 GMT -4
So far so good with the 9x. I have not range tested it or anything but so far so good. I am using an old 450 battery to power it I just had to change the connector on the battery. The battery will be moved to the rear tail boom. It will be mounted between the rear struts in a box support made from carbon fiber. If that is not enough I will move the rear servo to the rear of the boom and use a very short tail pushrod. I am also going to add two more boom supports that I have lying around to the top of the boom to help with the weight of the battery. As I said there is lots still to do. The next stage is getting the balance right on the gimbal and then reinforcing it with more carbon fiber. At the moment the servos are just 360. I took the pots out and extended the wires ( see vid ) so that I could if I wanted mount the pots on the pivot axis so I could use gyro stabilization. At the moment it is a 2 axis system but it won't cost much to covert to 3 axis. I thought I would see how I get on with this first. After all is done I may end up stretching it and converting to 12c. Which is a big expence with new motor, batteries and ESC not to mention the parts including blades. I may not do this as I dont't think there is a market here for it but I will see. Yes the shocks are 100mm from an RC buggy! 5 us I think they cost. They seem a bit soft but that can be easily be sorted with some motorbike fork oil I have if needed. Thanks for the complements!
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Post by sgmason on Jun 30, 2012 12:09:37 GMT -4
Be careful with the motorbike shock oils, some of them have a seal swelling additive in them, it helps to seal the shock. While it sounds like a good thing, if you shock seals are not meant for it they swell up and lock the shock. I had to pound a few bicycle forks apart and replace the seals in them because customer decided to top off their forks with motorcycle fork oil. I took an old fork bicycle fork seal and dropped it in some of the motorcycle fork oil and in 24 hours it went from being a 30mm fork seal to being the size of a large black doughnut and it never shrunk back down even after being washed and dried.
I know $5 isn't much money its just the frustration of having to get new shock.
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Post by Valkman on Jul 1, 2012 6:02:46 GMT -4
Hey thanks for the info. I'll see how I get on first so. There is pre-load on the shocks I can also try first if needed.
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mike
ROOKIE
Posts: 8
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Post by mike on Jul 1, 2012 12:47:24 GMT -4
Valkman,
On the shocks just change the springs to stiffen it up, you can buy a pack of springs in different colors and stiffness,if need be you can change the shock oil to a thicker oil. I don't know what kind of resources you have for hobby shops. those look like HPI shocks.
Mike
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Post by chipwich on Jul 1, 2012 19:34:15 GMT -4
Great valkman. Will be watching this project with interest. I just finished a DJI hexi/NAZA GPS with gear and a 2 axis GoPro gimbal. I had a dickens of a time getting the gains right on the gimbal stabilization, but think that I'm in a happy place now. The build was the easy part. Getting the stutter out of the roll axis on the gimbal was a biotch. The Chaos should be a great platform for what you are doing. I'll be adding FPV down the road, but want to get back on my 600E/AH-6 build before getting involved with another technology.
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Post by Valkman on Aug 16, 2012 14:51:40 GMT -4
I got a chance to do a bit more on it the last couple of days. I still have a bit to do. landing skids, battery tray, boom supports and a general tidy up after that.
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Post by sgmason on Aug 16, 2012 15:42:48 GMT -4
Does the CG change as the camera moves through its travel?
Looking forward to seeing the results of this project.
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Post by Valkman on Aug 16, 2012 16:38:49 GMT -4
The gimbal is balanced so the CG stays the same. If you look at one side of the gimbal is only has the battery on it. On the other side it has everything else. There is still a bit of work to do on it. Then I might sell the thing lol.
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Post by Valkman on Aug 18, 2012 5:07:40 GMT -4
I will be putting the AP ship on hold for a while. It looks like my ESC is more than maxed out as it is. I looked up the spec of mine and it is rated 3 to 5 cells. I am already on 6. It runs cool in normal flight but with the extra weight I may be pushing it. So I may just go ahead and stretch it to a 700 and 12c so I will need a new motor, HV ESC, KDE main gear, 700 Sym blades, 700 stretch kit and a more powerfull BEC or seperate battery pack for the RX. I will more than likely use 2 batteries from the 500 ( 2 * 3000 mah ).
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