MultiWii

frogstarb

That's actually not accurate, I believe. It's true that if the motors are counter rotating each other in sequence, MWC will handle pitch, roll and elevation without caring exactly which side they're turning, but yaw is slightly different, as MWC must know which motors to spin down or up to make the ...

frogstarb

Funny thing happened this weekend. I was flying around a bit, testing the GPS (now that I know it depends on ACC ) and the copter was really twitchy yet perfectly controllable. As before the twitches appear only on stable hover, the response to stick commands seems to be real good as even a noob lik...

frogstarb

Maybe this is just the noob in me talking, but are you sure you have the motors going the right way and the propellers in the appropriate direction too? It really looks like my hexa when I mount something wrong.

frogstarb

Well, this is being much more of a challenge than I expected, but I'm not complaining So yesterday I flashed my ESCs with SimonK's firmware. Today I recalibrated the throttle range and I must say that it did nothing to improve stability (though it wasn't stable to start with so it did do something)....

frogstarb

Hey gompf, Thanks for the info. I'm not the patient type so I went ahead and reflashed them with bs_nfet.hex from simonk, I didn't know I should have checked the fets... oops. Now, they all work and while I had to play with reversing rotation, everything else was simple and straightforward, I will c...

frogstarb

Hey all, Just received my socket tool for programming my ESCs. These are 12A hobby-king blue series (which HK implies are mystery rebranded), but before I go about building and flashing I thought I'd ask; are these know to work/not work with the alternative firmwares? Is there one I should try first...

frogstarb

Well, I resoldered what appeared to be perfect solder joints and in fact the motor doesn't stop now, although I have the ESC held differently than before so I'm hoping it's not a bad connection that just happens to be right now. Still, I should be getting some gear to allow me to reflash these ESCs ...

frogstarb

Yep, same difference. The actual base can probably be smaller than 50, but maybe that's overkill. As for TX capable of doing the mix, I only know of the 9x alternative firmwares (using er9x personally) and it is simple there, but even for others there should be no degradation from what we have now w...

frogstarb

Wasn't there one very interesting proposal for use base something notation for multiplexing multiple aux inputs in one? Something like (using base 50 here) AUX1 50 AUX2 100 AUX3 200 AUX4 400 AUX5 800 AUX6 1600 And just sum the values for the channels to turn on? I can't find the thread but I haven't...

frogstarb

thanks guys. I do trim my level mode on every flight day, but since I have the hover quirks it never gets really stable. I know about inflight level mode trimming using passthrough but never had good results with it. As I said I'm fighting too many battles at once here, so I really just needed the a...

frogstarb

I'm fighting multiple battles with my flyduspider hexa, with failing motors, hover wobbling and PID tuning boredom, but along with these I also have GPS troubles. I've got 2.1 with an i2c gps running EOSBandi's code, and all in all it runs fine, in that it communicates a stable position after gettin...

frogstarb

I have one of these in transit, and if it works as it should I'll be flashing my 6 hobbykink blue series 12A escs without even pulling out the soldering iron

frogstarb

timecop wrote:Why is this discussion 2 pages long already.

My first reaction was "another one without any exposure to open source development" but then I realized it was timecop

Best example of perfect usage of the irony and sarcasm combo I've seen in a while! Congrats

frogstarb

The NIMH tip is great, but I seriously doubt that's the case as last time it quit I was running on a full pack which should not trigger the shut down for either bat type. Still I started disassembling things and it turns out my ESCs are HK 12Amp BlueSeries which don't have pads but should be flashab...

frogstarb

I have no extras, and I've been planning on buying a set of ESCs that are rated with a little margin (18A+) and are flashable instead of buying spares for what I have. Still, once I disassemble things I'll check if I can reflash the ones I have now (and maybe move them to a smaller machine). I think...

frogstarb

Hello all, So I didn't have time to properly debug this, which means I'm posting in hope that someone will point me to the right direction and save me a little time. I have an hexa (flyduino spider) that has 1130kv motors running at 3s through 12A escs. I don't know the makes and models off the top ...

frogstarb

Hi, what would be the interrest to run multiwii code on a board where the sensors are not tied ? Running simulations on the MW algorithms. I have been thinking about this same thing, but haven't had the time to do anything about it, as it would allow running a simulated copter under a myriad of con...

frogstarb

Nice, interested. And where are you shipping from?

frogstarb

well, you obviously have more to say about this than most, as you actually have real hands on experience porting multiwii, what would the "ideal" platform look like and why would pic or arm be dead? I assume you mean there's not enough critical mass, but maybe you mean there's not enough m...

frogstarb

Well, I chose that one particularly because it had eeprom, 8 pwm, uart and i2c. Kinda thinking about my own hexa and what I'd need to replace the flyduino currently on it.

I have no issue with atmel, I was just considering my personal comfort zone

frogstarb

Hey, So I know very little of the hardware side of things, but I work closely with a (completely unrelated) company that uses PICs for most everything, from the smallest versions to the largest 32 bit ones. I've done some coding for them on the this framework and while I wouldn't vouch for the devel...

frogstarb

So today I balanced the copter perfectly and, alas, the forward flight tendency went away. Now I need to get the PID settings sane again as the wobbling is way too strong and with the new code / weight the old good settings are pretty much unflyable. There is another thing that is bothering me, and ...

frogstarb

tovrin, is that not for ACC? I can, and have done that for level flight, it's acromode that I'm having trouble with.

frogstarb

Ok guys, I need a little help again. Went to the field to do some tuning and no matter what the settings (P from 2 to 7, I from 0.02 to 0.04 and D from 15 to 45) the copter always has a strong forward flight tendency. What I mean is that even though the channel readings for the pitch channel are at ...

frogstarb

So I took it for a spin and, well, it is controllable but that's it. The wobbles are still very evident but since I failed to bring the tablet along I didn't try any further pid tuning. I also had my first crash, which was the result of loosing my sense of direction too close to the ground and compe...

frogstarb

I added a GPS last week, and due to some bad decision had the battery pushing against the i2c connector on the IMU. I didn't think this through but obviously my well insulated IMU was now getting all sorts of vibrations direct from the battery which was well attached to the frame... What fun! The th...

frogstarb

aaaaaand... nevermind. I had to redo the solder jumper, it seems. I just realized that's the way it was delivered to me and decided to give it a shot, all seems to be working fine now. I just realized I didn't set this to binary protocol so I'll have to redo, but still, it works.

frogstarb

So, I'm sure that my issue is not unique, but searching didn't give any obvious hints thus I'm opening a new thread: I have a perfectly working (and almost perfectly tuned) flyduspider hexa that uses a flysusense v1.1 bob with a FreeIMU 0.3.5 BMP. All working fine, no i2c errors at all. Today I rece...

frogstarb

Just an update on this slow moving target; I received my GemFans today, along with a BT dongle. To my surprise it turns out I already had GemFan props that's what you get for buying second hand into the hobby. But because there was a small dent here and there on the current props I went ahead and ba...

frogstarb

While I'm having a one person party, I'm trying to realize what the sensors are actually measuring; - If I pitch the copter, ACC follows the movement in absolute terms while GYRO detects the angular velocity of it. - If I roll the copter, ACC follows the movement in absolute terms while GYRO detects...

frogstarb

ha, I was going to ask how did you manage not to loose orientation, but then I saw you in goggles

I have to try FPV soon, as I suck at knowing which way the thing is pointing.

Great flight!

frogstarb

@Hamburger: agreed completely. While what the strategy is can be open to discussion, the simplicity of it must be priority. If you want a failsafe rock dropping, then that's very much obvious... the shortest codepath to disarm motors, period. I don't like this approach but that is personal bias. The...

frogstarb

So there are two main solutions with the simplest machines (no GPS, no sonar), and that's "drop like a rock" and "slowly approach ground with skin cutting propellers" I still prefer the latter, especially if I can add a loud buzzer to it, but I can also see the point for the form...

frogstarb

Guess I'm alone here. Still, I've been considering embarking in a slight deviation of the above described. If I can keep the copter stable (which I cannot yet, though it is stable-ish) it's because the software is trying to counter the detected movements in both gyro and acc. That's not a lot of fee...

frogstarb

I get nervous thinking about landing with baro... I mean, mine appears to have an accuracy of +-1m, which would make it unusable for vertical speed measuring. But the hover point setting is exactly what I meant initially, with some value subtracted from it for failsafe landing instead of a generic, ...

frogstarb

There is some automation possible on the 3rd axis, though I wouldn't call it stabilization per se; If you have a known distance to an object you are targeting (filming) you can keep the camera always pointing in its direction. MW doesn't support this, but if/when I get to that stage I'll certainly t...

frogstarb

copterrichie wrote:I agree however this would greatly depend on the individual copter. What is needed is some automatic means of determining the right value to descend quickly but safely.

Not exactly automatic but http://www.multiwii.com/forum/viewtopic.php?f=7&t=2183

frogstarb

I think for safety reasons the handling in case of failsafe must remain as simple as possible. You do not want to have weird errors in that part of the code. So the simple slow descend seems just right. I will turn the failsafe throttle value into a tunable parameter soon, so you can change it when...

frogstarb

Well, when you have a 1kg flying machine doing 20km/h (my case, others obviously have heavier and/or fly faster) I'd much, much rather have failsafe stabilize it and even counter the movement (though without a GPS or speed sensor that's not going to be possible, I guess) and start a controlled desce...

frogstarb

It's an hexa

But nitpicks aside, I'll try to fix that for the weekend. There isn't much to show as I don't fly all that much yet, but I can do a 7 minute hover movie, I'm sure that will be very interesting!

frogstarb

Something that just occurred to me, thinking back to some thread where there was some interest in using baro or acc to automatically calculate the correct failsafe throttle as the same copter would be flying with different payloads; Why not set a "HOVERTHROTTLE" in eeprom when setting the ...

frogstarb

Assuming you start with an X config, yes. And also yes to "at any deg turn"; if you have it at 180 deg, fwd will be backward.

frogstarb

what purpose does this serve? so you can keep your fixed camera aimed at something while you fly around it? While that is certainly one great use of it, I believe the reason for that feature, as advertised, is more of a learning aid. It is really hard when you are starting at any flying model to ma...

frogstarb

I think you should remove all vibration as much as you can before do PID tuning. It seems that you face too much difficult . I'm not sure you read the whole thread, but you are obviously right, first get everything smooth on the table. Thing is, it is smooth on the table, the IMU is well insulated,...

frogstarb

Up'd D to 45 and there was less wobble. yeepii! Went to 60 (yes, I'm that literal) and there might have been a little less wobble, but the copter started responding in hiccups, as in a little wind would go by and a fraction of a second later it would respond to that with the counter action, only it ...

frogstarb

so basically headfree is to disable yaw stick and mag is whereever yaw makes the quad point to.... it stays until another yaw comes in right? Headfree does not disable yaw stick. You can still rotate the yaw axis, but the roll & pitch axis behave as if the copter was pointing in the original po...

frogstarb

Just trying to wrap my head around the hard limits here... We've all probably seen m! and I know it is a closed space with no external influences and the machines are probably set up to a precision hard to achieve manually, but still there is something of a "locked in" feeling one gets by ...

frogstarb

Good progress. If I were you, I would carry on with D, go to 45, then 60 if necessary, leaving P and I alone for now. Some people say they like to go back and tweak P and I after reaching optimum D, but I haven't found this to be necessary. So what I'll be doing is increasing the average vector siz...

frogstarb

when your motors are armed but sitting at min throttle and you have the GUI connected, how much vibration do you see in the GUI? you should see close to no movement at all, in fact any movement you see at min throttle will only amplify as you crank up throttle. I have only tested this in my hand so...

frogstarb

Ok, so a couple more batteries into this, starting from a full reset (4.0/0.030/23) which was followed by a static hand test for P, which landed me at 10.0 without any wobbles. I didn't feel comfortable to keep on rising P so I took it to the "field" (backyard with very little space). It d...

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