MultiWii

Hi everyone I've been very happily flying my aerial photography Hexacopter using MultiWii 2.1 for the last few years: http://horizonimaging.co.uk/rcgroups/hexacopter/hexacopter_13-8-13_small.jpg I have a Flyduino FMP04 GPS BOB module wired into an old ATMega1280 Flyduino flight controller (using a F...

Hi lucamacs, Yes, it's very odd ... I've got a replacement FreeIMU (0.4.3) on the way which I will drop in place of the current one to see if it's a faulty magnetometer or not. I've tried resoldering the wires going from the FreeIMU to the sensor board, but still no joy (thought it might have been a...

I've been following the guide in the first post of this thread when calibrating: http://www.multiwii.com/forum/viewtopic.php?f=8&t=1387&p=10658 Seems a more controlled way of calibrating than just rotating it to point in as many directions as possible ... I could be mistaken though! I'm not ...

Hi wilco Hmm I guess it could be a wiring issue. I will double check it the next time I have the Hex in front of me. It does seem odd that it goes from working to frozen whilst sitting on the ground, and then without touching / moving the Hex, a restart of the software repairs the fault. It's almost...

Hi all I've got a strange problem with the magnetometer on my Hexacopter. I'm using a FFIMU0.4.3 and a Flyduino V1 board running MultiWii 2.1. I've managed to calibrate the magnetometer fine, and rotating the vehicle around the yaw axis creates a corresponding movement of the compass needle in the G...

Thomas - I've just ordered 9 of these ESCs from Hobby King and plan to reflash them on arrival (hence why I've ordered 9 when I only actually need 6!). They seem to be very highly favoured in the ESC flashing thread, and I've been bouncing many emails back and forth to timecop, and between us we dec...

Thanks for your input guys I've just learned that (according to timecop on RCGroups) re-flashing will actually make the heat situation worse as the FETs will be trying to switch even faster ... he recommends this ESC which he's had great success with, and he says also feature gate drivers: m I would...

You have mentioned using larger ESCs and looking at this picture, I think you would be best served with a 40 amp. You can always use more then needed. One thing that I do regardless of the ESC, cut the heat shrink off, add another piece of aluminum to help with heat dissipation, then re-heat shrink...

Thomas - it would be good if I could get the ESCs out into the airflow, but I do like having them all inside for neatness! I reckon if the ESCs on the hexacopter were running as cool as those on my tricopter (albeit out in the airflow), they would be just warm when kept in an enclosed space ... The ...

Hi Thomas, Many thanks for your reply! I've been pointed to this thread over on RCGroups where ESCs which are rated to "4S" actually get much hotter on 4S than they do on 3S: m I've ordered a programming cable for my current ESCs (looked at a spare one and it has an ATMega chip on the back...

Hi all I'm starting to test fly my Hexacopter in earnest now, and I've noticed that the ESCs are getting rather hot ... almost too hot to touch after a few minutes of hovering. Here are some specs: 4s1p 5000mAh 25C Turnigy Nano-Tech battery 6 x Turnigy Plush 25A ESCs (medium timing) 6 x Pulso U-28M ...

Hi Noctaro I'm using a FFIMU 0.4.3 sensor board which has a 3-axis gyro, accelerometer and magnetometer, and a barometer. I will try out your suggestions the next time I go flying! Good to know I can trim out any yaw drift using the transmitter trims. Can this also be done with forward/back/left/rig...

Hi all I've been flying my Hexacopter with a Flyduino and Multiwii 2.0 pre-release 4 and have been noticing a possible bug. If I give left yaw input followed quickly by a right yaw input (or right followed by left), all 6 motors seem to throttle up strongly making the hexacopter jump a metre or two ...

It works!! I just had to change the board type in the Arduino to a Mega 1280!

Now I can get on with the build of the hexacopter again! ... although first I need some sleep

Cheers for now!

David

Hi again! I've just tried with the new FTDI cable, and the same thing happens. I've also tried the FTDI cable with Arduino 0022 using the v1.8 software that's already loaded onto the Flyduino, and I get the same error! :confused: Has something died on the Flyduino between the last time I flew it in ...

Hi all Just getting back into my Hexacopter project after it lay dormant for 6 months ... I've bought a FFIMU v0.4 and have downloaded the latest Arduino software to install the MultiWii 2.0 pre-release version 4 code onto my Flyduino, but I now get the following error each time it tries to upload t...

Hi KeesvR, Thanks for your reply I've just removed the two larger magnets which hold the motor arms shut and the magnetometer now works perfectly! ... there are still four smaller magnets around the avionics board which holds the black dome on, but they don't seem to affect it (or at least the chip ...

Hi all I am having problems getting a new FreeIMU 0.3.5 magnetometer calibrated ... below are the symptoms I'm experiencing (I've pinged Jussi a copy too). I defined the FREEIMUv035_BMP in the code but immediately noticed that some of the gyro, accelerometer and magnetometer values were reading inco...

Hi guys Sorry for the delay in replying, I haven't had access to the hexacopter for a few days. Alex you were spot on! I have reduced the MINCHECK value to 1000 and the glitches have gone! I have also adjusted the throws on the transmitter to ensure all channels now go from 1000 to 2000, with centre...

Here's a video clip showing the problem in the GUI ...

http://vimeo.com/27569510

Cheers


David

Ooh gosh I will have to have a hunt around for one of those! I might have one kicking around at my parent's house where most of my old R/C stuff still resides ... Interestingly I'm using the same receiver on my tricopter with no such problems ... but then the sensors are different (WMP and NK) ... A...

Hi Thomas Thanks for your reply - I should have provided that information earlier. I'm using a Flyduino V1, FFIMUv2, Futaba R617FS 7-channel receiver, Turnigy Plush 25A ESCs, and am powering all the avionics from a 5V UBEC. I2C is set to 400kHz. Cheers David PS. As soon as I raise the throttle above...

Just as a note, this also happens on 1.8 as well. It seems to be generated by the the MultiWii end rather than the ESCs, as the GUI shows the glitches even without the ESCs powered up.

Does anyone have any ideas?

Many thanks


David

Hi all I've got a strange problem with my hexacopter setup which concerns me a little. When the motors are running at idle and I give full forward pitch on the cyclic stick, the rear three motors twitch up to 1500 to 1600µs and back to idle (1300) rapidly and randomly. If I give full backward pitch,...

It's all working great, thank you!


David

I don't have the hexacopter with me at the moment, but can you tell me whether the GUI looks the same as 1.7 before you actually connect? I've attached a screenshot of the result of the Processing .. err, process!

Many thanks


David

Ahh brilliant, thanks for that! Looks like I can build the application just fine ... will have a play with it soon.

Thanks again for your help Thomas!


David

Hi RC-CAM, thanks for your reply So am I right in thinking I need to modify an original MultiWiiConf1_7 folder, by replacing one of the .pde files with the DynEqMultiWiiConf1_7.pde file that Jibeer has provided? When you unzip the file package you need to preserve the directory structure. If everyth...

Ah I see what the problem was - both .pde files were in the same directory. I've moved the Conf file into its own folder and it uploaded fine now My next problem is how to use the GUI ... in other MultiWii updates, a new GUI has been posted with the new code for the vehicle. What do I need to do to ...

Hi Jibeer I've just tried to upload this code, and it gives me the following errors, with: /*********** RC alias *****************/ highlighted in the code ... Do you know what's going wrong here? Cheers David DynEqMultiWiiV1_7:282: error: expected unqualified-id before 'public' DynEqMultiWiiV1_7:28...

Great idea! I'm just about to attach the props to my hexacopter and this will make tracking down vibration a lot easier.

Thanks!


David