PIPO ISU - stabilization board

kaos · Post by **kaos** » Sun Mar 25, 2012 2:47 am

Erazz: once it is stable and working. I want one. Have 7 450s to try out.

The current 3 axis gyro for heli on the market is just not good enough or way too expensive, IMO.
Actually 2, one for my VTOL thing.

One more thing. I thought you just 'like' heli, did not know you actually fly a heli.

Post by **erazz** » Sun Mar 25, 2012 4:15 am

Happy to oblige. Actually, a VTOL is a perfect application since the mixer would have software switches (just like er9x) so you could switch functions on and off.
Still a bit off. But now that the core works properly I can focus on the mixer.

Post by **erazz** » Sun Mar 25, 2012 7:50 pm

To answer the question that was raised.
I have managed to lower the price of the unit to $65. This is because of the savings in removing the HMC5883L (which was a pain to use) and substitutions which made the board much simpler to build and reduced component count.

I'm willing to give members of the forum a $5 discount. If you want to buy one, please PM me.

Please note that shipping is $7 for USA and $18 for international. This is simply the cost of sending the units in the mail. If I can get a lower rate I'll pass that on to you.

Post by **cre8tiveleo** » Sun Mar 25, 2012 10:47 pm

So what's da price? I support the Genii here.
Lemme know, I buy! I try! I make go boom!

Looks good Erazz!

Did up all the leds on the quad, and install the el lighting too. all I need to do is hook up the esc's and it;'s airborn.

kaos · Post by **kaos** » Sun Mar 25, 2012 11:06 pm

Now it needs to be as good as this one, right?

http://www.youtube.com/watch?feature=pl ... 39vJb9GHoU
http://www.youtube.com/watch?feature=pl ... FCQrzMUsTs

Post by **erazz** » Sun Mar 25, 2012 11:24 pm

I bet it would do exactly that. Haven't got the courage to go that close to it yet

This is today:
http://www.youtube.com/watch?v=4WNOLYSMWJw

Post by **jhsa** » Sun Mar 25, 2012 11:33 pm

Flies really good.. what about if you put some more expo and/or decrease the RC Rate a little more.. I could see that you nearly didn't move your fingers and had quite a bit of movement on the quad

Post by **erazz** » Sun Mar 25, 2012 11:46 pm

Yeah, I got a prescaler on the inputs. Need to tone it down a bit. I was actually afraid of not having enough control.

Post by **jhsa** » Sun Mar 25, 2012 11:48 pm

I think you have more than enough, unless you want to do some nice and fast flips of course

kaos · Post by **kaos** » Mon Mar 26, 2012 12:57 am

Erazz, I think you just bumped into a great medical invention: Advanced diagnostic machine for Parkinson's disease.

Just kidding, actually what you need is to refresh your hovering on the heli again.

Post by **erazz** » Mon Mar 26, 2012 2:23 am

I'll tone down the prescaler... Let's see if it makes it beter

And yes, I do want nice fast flips. Need to find out how to do that as well.

kaos · Post by **kaos** » Mon Mar 26, 2012 4:24 am

erazz wrote:And yes, I do want nice fast flips. Need to find out how to do that as well.

You already found the way. just add a switch to short where the resistor mod is and flip the switch back after the quad is flipped.

I don't know a quad can do a flip. (I am totally unfamiliar with quad) unless you use blades can change to negative pitch. or you have a super power motors you can spd up two motor so fast while stop the other 2 on a dime. yeh, why not, program it to use a hard break then reverse the 2 motors on the other side.

Post by **GrootWitbaas** » Mon Mar 26, 2012 4:40 am

you should watch the video's by Wartox ...then you see how to flip a quad

Let me find some and link them

Post by **erazz** » Mon Mar 26, 2012 4:46 am

Like this?
http://vimeo.com/38802024

Post by **GrootWitbaas** » Mon Mar 26, 2012 4:53 am

actually the one I liked most is this one :
http://vimeo.com/34860256
but yea, all his video's are good, and If you really want the Pipo to be tested, send one to him

kaos · Post by **kaos** » Mon Mar 26, 2012 6:41 am

Wow, that is an eye opener for me. (both videos). those motor are fixed, all done by differential thrust. I wonder how that thing can rotate along one axis (with two motor on the axis) without moving the axis. that is very intriguing, interesting.

Dang, you guys try to trick me spending more money!

I am already broke for the FPV project.

Post by **Crucial** » Mon Mar 26, 2012 6:52 am

I thought differential thrust is the basis of how all multi rotors are controlled. You are adjusting the thrust of each motor to pitch the vehicle in the direction you want it to go. Flipping it would require spinning one side faster and the other would be slowed down.

kaos · Post by **kaos** » Mon Mar 26, 2012 7:17 am

That I can understand, but the axis that quad was rotating is along the axis with two rotors, how in the world when that thing rotates along that axis (when the two rotors are also rotating with the axis) and the quad won't move out of the line. amazing. when that quad is rotated 90 degree, the two motor on the axis should push the quad to the side while rotating but it wasn't.
or May be it is rotating so fast by the other two rotor while reducing those two on the axis to minimum so it is not perceived.

Post by **Kilrah** » Mon Mar 26, 2012 7:20 am

erazz wrote:And yes, I do want nice fast flips. Need to find out how to do that as well.

Most multis that flip have an automated "flip routine". The control authority is "normal" so you can fly it conveniently, but the controller will for example detect if you bring the stick from center to a full end quickly (in like half a second), which shouldn't happen in normal flight, and treat that as "flip command". There it will give a short surge to all motors to give a little upwards movement to compensate for the loss of altitude that will occur during the flip, then give full control input in the direction in which you want to do the flip, while bringing the motors of the other axis as slow as possible within the regulation range so that you have the least possible total thrust while the quad is on the side and upside down to drift and accelerate towards the ground as little as possible.

That said - I think I might want a couple of your boards

Post by **jhsa** » Mon Mar 26, 2012 9:23 am

This one is funny.. excellent

http://vimeo.com/38809811

Post by **erazz** » Mon Mar 26, 2012 11:27 am

I though about adding a flip routine. Seems to be an "ugly" solution. I'll look for another option

I think that the big difference between the boards they have and PIPO is that PIPO is designed to be generic. Once the mixer is in place it will be able to control more than just quads.

gohsthb · Post by **gohsthb** » Tue Mar 27, 2012 11:15 am

Will the Pipo be able to do this when it is finished?

http://www.youtube.com/watch?v=YQIMGV5vtd4

Post by **Crucial** » Tue Mar 27, 2012 1:19 pm

I just hope you all know that you are the forefathers of our destruction at the hands of the robot army to come.

Post by **cre8tiveleo** » Tue Mar 27, 2012 1:22 pm

It's Skynet, once it becomes aware, all out quads are doomed to slavery to the greater of the machine. Machine will become one, machine will be our overlord, all our base belong to machine.

gohsthb · Post by **gohsthb** » Tue Mar 27, 2012 5:56 pm

Yea but the machine that we seem to be creating is only going to want beer. As long as that doesn't run out all should be good.
-Gohst

Post by **erazz** » Tue Mar 27, 2012 6:22 pm

You saying that I should focus my efforts into making er9x-beer and not pipo?

I'm a great beer consumer - not producer. Beer goes in - code comes out.

Post by **cre8tiveleo** » Tue Mar 27, 2012 6:33 pm

I know a molsons rep, I probably can arrange for a truck of Molsons beer, somehow... hmmm....

Post by **jhsa** » Tue Mar 27, 2012 6:41 pm

erazz wrote: Beer goes in - code comes out.

erazz, you start thinking like a Machine

Post by **erazz** » Tue Mar 27, 2012 6:44 pm

Haven't had Molsons yet....

Hmmm.... BICO.

Post by **erazz** » Tue Mar 27, 2012 7:01 pm

Oh, btw, (back to the original subject)

I toned down the prescaler and got excellent results. I might try to do the indoor hand-bumping thing later on.
I think that PIPO is now up to par with anything else that I have seen. Now the only way to go is UP!

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