MTnet Builds Flying Machines: Failure Accomplished
04-30-2013, 10:38 PM
#64
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I dont even know whats happening anymore.
I flew today in some pretty high winds with tw34k, video looks like **** and I think I need more vibration dampening on my controller board. Enjoy the music, lol
I flew today in some pretty high winds with tw34k, video looks like **** and I think I need more vibration dampening on my controller board. Enjoy the music, lol
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05-26-2013, 03:18 AM
#66
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Heres a little bit of video I got recently flying yet again in some high winds both times:
Also, I have been slowly upgrading the old aluminum X frame. I drilled out a few rivets and rebuilt it with a lexan top and bottom plate, held down with 10-32 button head screws.
The lexan is very strong and most importantly it is flat. This brought the frame back to being straight and true after surviving several hard crashes.
Then I added some extended motor mounts wich will allow me to run a 10 or 11 inch prop with some new motors. So now Im just waiting for some parts.
Also, I have been slowly upgrading the old aluminum X frame. I drilled out a few rivets and rebuilt it with a lexan top and bottom plate, held down with 10-32 button head screws.
The lexan is very strong and most importantly it is flat. This brought the frame back to being straight and true after surviving several hard crashes.
Then I added some extended motor mounts wich will allow me to run a 10 or 11 inch prop with some new motors. So now Im just waiting for some parts.
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05-26-2013, 11:46 AM
#68
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I too am digging the mounts, where are they from?
So it turns out the APM firmware for Tri's is a giant piece. Something is not allowing my yaw servo to return to zero if there is ANY throttle input at all. I can pull the props and bolt the bitch to the floor and it still stays about 10-15° off center if I give it yaw input and throttle. This causes it to spin like a many bladed top as soon as it breaks ground. I can also see the servo jitter like crazy as I throttle up. Everything is exactly the same when the components are removed from the frame and bolted directly to my workbench. If I remove the APM and plug everything directly into the receiver, it's 100% true and works as expected. Sad panda up in here.
I'm going to order a quality "filtered" BEC and some torrad rings to try to isolate this, but I think the APM is ultimately going to end up on a Quad.
So it turns out the APM firmware for Tri's is a giant piece. Something is not allowing my yaw servo to return to zero if there is ANY throttle input at all. I can pull the props and bolt the bitch to the floor and it still stays about 10-15° off center if I give it yaw input and throttle. This causes it to spin like a many bladed top as soon as it breaks ground. I can also see the servo jitter like crazy as I throttle up. Everything is exactly the same when the components are removed from the frame and bolted directly to my workbench. If I remove the APM and plug everything directly into the receiver, it's 100% true and works as expected. Sad panda up in here.
I'm going to order a quality "filtered" BEC and some torrad rings to try to isolate this, but I think the APM is ultimately going to end up on a Quad.
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05-26-2013, 12:18 PM
#69
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Here are the motor mounts
Hexacopter Quadcopter Multicopter Motor Mount Hobby King Alum ATG 400 X500 X525 | eBay
Theyre actually pretty strong, but I bought an extra 2 because I figure I will eventually bend some up.
EO2K,
Thats pretty lame. I havent really paid much attention to tricopter electronics. Maybe some kind of little multiwii lite board? Its mostly going to be for fun flying, acrobatics Id imagine.
Hexacopter Quadcopter Multicopter Motor Mount Hobby King Alum ATG 400 X500 X525 | eBay
Theyre actually pretty strong, but I bought an extra 2 because I figure I will eventually bend some up.
EO2K,
Thats pretty lame. I havent really paid much attention to tricopter electronics. Maybe some kind of little multiwii lite board? Its mostly going to be for fun flying, acrobatics Id imagine.
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05-26-2013, 12:31 PM
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I'll figure something out with it eventually, I'm just disappointed I'm not smashing it into the ground this weekend.
In all fairness, it could be my servo. Ive got another HS82MG i can try I just haven't been motivated after ripping things apart. The 82 is analog, so I may also try a high torque digital metal gear servo and see if that fixes anything. Its only money, right?!
In all fairness, it could be my servo. Ive got another HS82MG i can try I just haven't been motivated after ripping things apart. The 82 is analog, so I may also try a high torque digital metal gear servo and see if that fixes anything. Its only money, right?!
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05-26-2013, 12:43 PM
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I know Ive seen people use analog servos, but the fast majority seem to use digital and digital is what is always suggested.
I think you would want to get a good digital servo regardless, so with that logic you can justify throwing more money in the toilet, hahaha.
What size motors are you using?
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.
EDIT:
Couple extra pics
I think you would want to get a good digital servo regardless, so with that logic you can justify throwing more money in the toilet, hahaha.
What size motors are you using?
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.
EDIT:
Couple extra pics
Last edited by Full_Tilt_Boogie; 05-26-2013 at 12:58 PM.
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05-27-2013, 04:33 PM
#72
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Motors are Turnigy D2836/11 750KV. Closest thing I could find at HobbyKing to the DT750s that are now perpetually out of stock.
Muy Problemas
As you can imagine, this makes taking off somewhat problematic.
Muy Problemas
As you can imagine, this makes taking off somewhat problematic.
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05-28-2013, 01:25 AM
#78
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Full_Tilt_Boogie: My apologies for the threadjacking 
LMK if I should 
Hitec HS-82MG Micro Metal Gear Servo 2.8kg/0.12sec/19g
Its not the strongest thing ever, but Hallstudio on Youtube is using the **** out of these things on his own tri's. (Skip to 46 minutes)
He's running a far more ghetto looking tail boom assembly and SunnySky V2212-9 1400KV motors @ 70g/ea, so same weight neighborhood.
Valid, but even with a prop on it it does the same. I tend to remove the props indoors, Lola kitty seems to be very interested in the machine.
Yeah, been reading about this today some more. It sounds like this may be an "edit the code" thing. This is the obnoxious part of open source 
LMK if I should Its not the strongest thing ever, but Hallstudio on Youtube is using the **** out of these things on his own tri's. (Skip to 46 minutes)
He's running a far more ghetto looking tail boom assembly and SunnySky V2212-9 1400KV motors @ 70g/ea, so same weight neighborhood.
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05-28-2013, 02:06 AM
#79
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Naw its cool. This is now the official multirotor thread lol
So tonight Tw34k and I built a tricopter from scratch with spare parts, including the old futaba analog servo I mentioned before.
Ill try to get him to get in here and post some pics.
So tonight Tw34k and I built a tricopter from scratch with spare parts, including the old futaba analog servo I mentioned before.
Ill try to get him to get in here and post some pics.
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05-28-2013, 01:07 PM
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What size motors are you using?
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.
Just last night I was helping my buddy build a ghetto/cheap tricopter using an old futaba analog servo. We haven't flown it yet but we were already researching servos.
If I were you Id pick one up from HobbyPartz.com because its in the states and they deliver quickly.
This was what I was suggesting to him for moving around a big ol' DT750:
Solar Servo D222 0.17@6.0v Digital 37g
but its probably overkill if youre running a smaller motor.
Edit: Lol @ HobbyKing
TGY-390DMH High Performance MG Digital Servo (Extra Strong) 5.4kg / .11sec / 22.5g (US Warehouse)
BMS-390DMH High Performance Digital Servo (Extra Strong) 5.4kg / .11sec / 22.5g (US Warehouse)
I wonder what the difference is? hah! I'll probably order one and try it out.
Last edited by EO2K; 05-28-2013 at 01:29 PM.
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