M4 Showcases

Info and discussion about the autonomous Micro FC, suitable for nanos, micros and mini multirotors

One (M)4 all!

Postby aBUGSworstnightmare » Sun Oct 12, 2014 3:19 pm

Always wanted to be able to swap your flight controller between different frames without ripping your craft apart?

Thanks to the M4's expansion ports this will be quite easy now:
SANY0327.JPG
M4 moved from the rOsewhite Rachel to my 'good old' test rig

SANY0328.JPG
Detail shot showing the M4 sitting on the warthox frame

SANY0329.JPG
Side view - keep in mind: this is a test rig --> metal standoffs instead of plastic (preferred!)

SANY0304.JPG
M4 uSD-BLSDC expansion board - this tiny board (or a similar one) will be needed for all your frames (in case you want to use the M4 with brushless DC motors), making it easy to use the M4. The uSD card stays on the frame --> load settings from card and go flying!
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Re: M4 Showcases

Postby kinderkram » Sun Oct 12, 2014 5:45 pm

Good job, Joerg! 8-)

Will you be offering the expansion boards for sale - or what are your plans?

btw: how did you manage to fixate the metal standoffs on the warthox frame?
The screw part usually isn´t long enough to poke through the entire cp and arm material...
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Re: M4 Showcases

Postby Max » Sun Oct 12, 2014 9:33 pm

Nice one Joerg, very slick. Expander and "motherboard" all in one, nice idea. I like how you can keep the settings on a card with the frame.

Cheers,
-Max
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Re: M4 Showcases

Postby aBUGSworstnightmare » Mon Oct 13, 2014 10:28 am

kinderkram wrote:Good job, Joerg! 8-)

Will you be offering the expansion boards for sale - or what are your plans?

btw: how did you manage to fixate the metal standoffs on the warthox frame?
The screw part usually isn´t long enough to poke through the entire cp and arm material...


Hi Norbert,

to be honest, I don't have any explicit plans for the board at the moment. If there is only a small request I'm willing to build them and sell 'em at cost.
There is also a request from Tilman (rOsewhite) for a small M4 carrier board, but we did not talk about any details/specifics so far.
Since Jussi will have it's own one I don't think he/Paul will be interested in doing a production run.
I'm currently using two versions, where the one with the M2 set nuts is my personal preference (since you don't need to fiddle around with nuts). I decided to have two versions in the beginning since I wasn't sure if the 'set nut idea/design' will work.
SANY0318.JPG
My two versions side by side: left is using M2 set nuts

SANY0326.JPG
Set nuts mounted - top view

SANY0325.JPG
Set nuts mounted - bottom view


Regarding the standoffs: they have a thread on both sides! I use screws which were 3 to 4mm longer than really needed. First comes a self locking nut --> the frame is screwed at maximum stiffness. The plastic standoffs were then screwed to the remaining 3 to 4mm, atop of the self locking nut. You can see them below the white standoffs!

Max wrote:Nice one Joerg, very slick. Expander and "motherboard" all in one, nice idea. I like how you can keep the settings on a card with the frame.

Cheers,
-Max

Yep, that was my intention. I wanted to be able to swap the M4 between different frames (when using BLDC ESC and only the on-board RX) without the need of unplugging any cable connection.
Keeping the uSD together with the frame also brevents mixing up different lo files.

Rgds
Joerg
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Re: M4 Showcases

Postby joebar.rc » Wed Oct 22, 2014 3:48 pm

My attempt for the M4 on an other frame.
The M4 has 4 onboard motor drivers, those are brushless and cant be used for normal esc's. So an extension board was made to use the M4 digital ports available on the 10 pins connectors.
The original motor drivers are now used for led signaling.

M4 comes with an 1Kg license for the Quatos adaptive controller (PID controller replacement). Quatos usually relies on an closed loop mode with the ESC's but with some changes and lots of testing it is possible to use it with fast esc's in open loop. The Kiss esc's are just perfect for this.

Using the extension board is ideal for swapping, only 2 small m2 bolts need to be removed and the M4 can be detached.

2014-10-17 14.49.09.jpg
M4 and extentionboard


Frame: GLB 250AV frame
2014-10-18 09.05.10.jpg


4 beautiful Kiss Esc's
2014-10-18 09.05.32.jpg
Kiss esc's


Done, , 4x emax 1806 with 5x4 HQ props, 3S 1300mAh (11-13min flight), full graupner HoTT telemetry, full navigation etc @ 372 gram.
2014-10-18 13.38.14.jpg


Maiden flight. No calibration, only tare. Using Quatos makes tuning so much simpler, maiden flight was obviously tuned for 'friendly' response..



Quatos geometry, dimension and masses XML file for this frame
l1_quad_250.xml
(1.31 KiB) Downloaded 527 times
Last edited by joebar.rc on Fri Oct 31, 2014 3:39 pm, edited 1 time in total.
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Re: M4 Showcases

Postby aBUGSworstnightmare » Thu Oct 23, 2014 10:48 am

Sweet!
Menno, love that one 8-)
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Re: M4 Showcases

Postby teramax » Mon Nov 03, 2014 1:12 am

Menno, not on the pictures nore on the video i see the gps antenna but i know there has to be one due the fakt the TX shows 3D lock. :?
confused

btw.: best flying FPV dwarf ive seen so far! :D
somehow everything can fly
http://www.youtube.com/user/ter4m4x
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Re: M4 Showcases

Postby joebar.rc » Mon Nov 03, 2014 7:33 am

Oh it's the Marcus :). In the vid just after the battery an oversized 25mm patch.
I have a 10mm too but the cable was to short, it's now lengthened so have to try it too and off course a simple dipol antenna too to try.
Yes, the thing is GREAT and fits perfectly within the quatos hobby license boundaries.
Yesterday I did fly it with 6x4 props, just enough clearance for the 6" and now it's insane! (For AQ based FC that is..)
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Re: M4 Showcases

Postby aBUGSworstnightmare » Mon Nov 03, 2014 7:39 am

Hi,

somebody out there who's able to generate Quatos params for MN2206-11 2000KV + T-Motor 6x2 CFK props for KISS ESC? Then we would have a second setup to show (since everything is lying on my desk :D ).

Joerg
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Re: M4 Showcases

Postby Kisssys » Fri Nov 14, 2014 9:23 pm

Hi Menno,

I have a HK FPV250 and those same motors and props. Could you post your parameter set for your build and I won't have to do the motor test.

Cheers
Steve
Steve
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