Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi there
There is some rumor that the hobbywing esc's won't work anymore on MultiWii because of the 490Hz PWM update rate.. Other FC's which use 400 work well..
Warthox has reported this problem here: http://www.rcgroups.com/forums/showthread.php?t=1608239
Is there any way to change the 490 Hz to 400 Hz so the HobbyWing will work again..
Thanks!
There is some rumor that the hobbywing esc's won't work anymore on MultiWii because of the 490Hz PWM update rate.. Other FC's which use 400 work well..
Warthox has reported this problem here: http://www.rcgroups.com/forums/showthread.php?t=1608239
Is there any way to change the 490 Hz to 400 Hz so the HobbyWing will work again..
Thanks!
Last edited by jessestr on Tue Mar 27, 2012 6:36 pm, edited 1 time in total.
Re: Run MultiWii @ 400 Hz - Very Important !
yes , with the new output.pde (thanks to ronco) it is quite easy to change ..
ps : can you please update the title with 'esc'
ps : can you please update the title with 'esc'
Re: Run MultiWii @ 400 Hz - Very Important !
Hi,
i did a flight with such ESCs and a promicro today with no problems! so i belive that it is not the 488hz i think its more the resolution!
http://www.rc-heli-fan.org/quadrocopter ... l#p1370125 (german)
if this is true .. that kind of ESC's should work with a mega for up to hexa too.
regards felix
i did a flight with such ESCs and a promicro today with no problems! so i belive that it is not the 488hz i think its more the resolution!
http://www.rc-heli-fan.org/quadrocopter ... l#p1370125 (german)
if this is true .. that kind of ESC's should work with a mega for up to hexa too.
regards felix
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Thanks!
Ronco.. What about the 10A HobbyWing's .. Do they still work?
And I have 3 HW10A - HW133V2 (the old ones) I lost my fourth by crashing.. can I use a newer version together with the older ones?
And where can I find the new output.pde?
Thanks
Jesse
Ronco.. What about the 10A HobbyWing's .. Do they still work?
And I have 3 HW10A - HW133V2 (the old ones) I lost my fourth by crashing.. can I use a newer version together with the older ones?
And where can I find the new output.pde?
Thanks
Jesse
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi Jesse,
the new output is alredy in 2.0 .. and if it is the resolution. it will not fix anything for the promini!
i did some more tests now and this ESC's i have (that looks like the one from warthox) seem to work with less resolution and 488Hz too.
the new better reolution works only with a mega or a 32u4 (promicro) .. not for promini..
the older "atmel" ESC's will work as thay did in 1.9 but i cant tell you if thay work well together.
regards Felix
the new output is alredy in 2.0 .. and if it is the resolution. it will not fix anything for the promini!
i did some more tests now and this ESC's i have (that looks like the one from warthox) seem to work with less resolution and 488Hz too.
the new better reolution works only with a mega or a 32u4 (promicro) .. not for promini..
the older "atmel" ESC's will work as thay did in 1.9 but i cant tell you if thay work well together.
regards Felix
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
ronco wrote:Hi Jesse,
the new output is alredy in 2.0 .. and if it is the resolution. it will not fix anything for the promini!
i did some more tests now and this ESC's i have (that looks like the one from warthox) seem to work with less resolution and 488Hz too.
the new better reolution works only with a mega or a 32u4 (promicro) .. not for promini..
the older "atmel" ESC's will work as thay did in 1.9 but i cant tell you if thay work well together.
regards Felix
Thanks.
I guess I have to switch from flightcontroller
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
This problem also exists on these esc? hobbywing skywalker 20a?? or can I go quiet
Re: Run MultiWii @ 400 Hz - Very Important !
kos wrote:yes , with the new output.pde (thanks to ronco) it is quite easy to change ..
I can not find where to set to 400
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi,
i made a output for 2.0 that can do some 400Hz
on top of it is ESC_400 defined
the result is
Promini
- Motor1: 400Hz resolution 125 (as it is without this mod)
- Motor2: 400Hz resolution 125
- Motor3: 244Hz resolution 64 (more isnt possible with HW PWM and lower Hz then 488 on Timer 2)
- Motor4: 244Hz resolution 64
- Motor 5-8 is still 488hz
Promicro
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 511 (more isnt possible with HW PWM on Timer 4)
- Motor4: 400Hz resolution 511
- Motor 5-8 is still 488hz
Mega
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 1023
- Motor4: 400Hz resolution 1023
- Motor5: 400Hz resolution 1023
- Motor6: 400Hz resolution 1023
- Motor 7 & 8 is still 488hz
this is just to make shure that the problems are, or are not because of the 488Hz!
if it is i will see if there are better ways for promini! .. and then i may also make the soft PWM motors (5-8) work at 400Hz
this works only with MWC 2.0!
regards felix
i made a output for 2.0 that can do some 400Hz
on top of it is ESC_400 defined
the result is
Promini
- Motor1: 400Hz resolution 125 (as it is without this mod)
- Motor2: 400Hz resolution 125
- Motor3: 244Hz resolution 64 (more isnt possible with HW PWM and lower Hz then 488 on Timer 2)
- Motor4: 244Hz resolution 64
- Motor 5-8 is still 488hz
Promicro
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 511 (more isnt possible with HW PWM on Timer 4)
- Motor4: 400Hz resolution 511
- Motor 5-8 is still 488hz
Mega
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 1023
- Motor4: 400Hz resolution 1023
- Motor5: 400Hz resolution 1023
- Motor6: 400Hz resolution 1023
- Motor 7 & 8 is still 488hz
this is just to make shure that the problems are, or are not because of the 488Hz!
if it is i will see if there are better ways for promini! .. and then i may also make the soft PWM motors (5-8) work at 400Hz
this works only with MWC 2.0!
regards felix
- Attachments
-
- Output_400hz.zip
- (6.31 KiB) Downloaded 519 times
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Cronalex wrote:This problem also exists on these esc? hobbywing skywalker 20a?? or can I go quiet
up
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Cronalex wrote:Cronalex wrote:This problem also exists on these esc? hobbywing skywalker 20a?? or can I go quiet
up
i dont know .. i dont have that ESC's but i think it is. (http://www.rcgroups.com/forums/showthread.php?t=1608239)
i changed the output mod again .. now Motor 1-4 for Promini is 400Hz and 125 steps resolution!
motor 2 & 3 is now with soft PWM .. i think that is better then HW PWM with 244Hz
so:
Promini
- Motor1: 400Hz resolution 125 (as it is without this mod)
- Motor2: 400Hz resolution 125
- Motor3: 400Hz resolution 125
- Motor4: 400Hz resolution 125
- Motor 5-8 is still 488hz
Promicro
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 511 (more isnt possible with HW PWM on Timer 4)
- Motor4: 400Hz resolution 511
- Motor 5-8 is still 488hz
Mega
- Motor1: 400Hz resolution 1023 (as it is without this mod)
- Motor2: 400Hz resolution 1023
- Motor3: 400Hz resolution 1023
- Motor4: 400Hz resolution 1023
- Motor5: 400Hz resolution 1023
- Motor6: 400Hz resolution 1023
- Motor 7 & 8 is still 488hz
regards
felix
- Attachments
-
- Output_400Hz_2.zip
- (6.49 KiB) Downloaded 541 times
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
RONCO DO I REPLACE THE OUTPUT IN 2.0 WITH THIS ONE OR DO I ADD IT TO IT?
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
GOT IT ! I JUST REPLACE THE STOCK FILE WITH YOURS !! GREAT JOB RONCO YOU ARE THE MAN !!!! THANX !!
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi Chris,
can you please tell us what ESC's do you use?
and is there a big difference now with 400Hz?
if it is i will make this mod clean. so defines in config.h and i will also turn the SW PWM motors (5-8) to 400Hz
regards Felix
can you please tell us what ESC's do you use?
and is there a big difference now with 400Hz?
if it is i will make this mod clean. so defines in config.h and i will also turn the SW PWM motors (5-8) to 400Hz
regards Felix
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Ronco i have skywalker esc's and they run at 423hz ! That file runs great in my quad ! Throttle is alot smoother and quad feels 100% better !! Please let me know if you make a cleaner version as i think this is a great thing !! THANK YOU VERY MUCH ! Can you make me an output file at 423hz ? Thats what hobbywings run at ! If not thats ok because this feels real solid and smooth!!
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi Ronco
Do you know if it's confirmed already? For the pro mini then..
I bought some new HW10A HW133V2 .. (the good ones) so I won't be able to test it I think?
Do you know if it's confirmed already? For the pro mini then..
I bought some new HW10A HW133V2 .. (the good ones) so I won't be able to test it I think?
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
jessestr wrote:Hi Ronco
Do you know if it's confirmed already? For the pro mini then..
I bought some new HW10A HW133V2 .. (the good ones) so I won't be able to test it I think?
i dont know. chris ables is the only one who had a good result with this 400Hz mod (or the only one who told us)
i talked to warthox and he isnt shure that it is because the 488Hz .. so i may be good if some more people can give us some feedback
chris ables wrote:Can you make me an output file at 423hz ?
it may be possible but i dont think that it will be a difference to 400Hz
regards Felix
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Will this mod work with the Arduino pro mini?
I have an Arduino mini based quad using the new Hobbywing 25A ESC's - am having the same troubles experienced by Warthox.
If the mod works with the mini I will try it out over the weekend and report back.
Cheers
Dave
I have an Arduino mini based quad using the new Hobbywing 25A ESC's - am having the same troubles experienced by Warthox.
If the mod works with the mini I will try it out over the weekend and report back.
Cheers
Dave
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi Dave,
yes this mod works with the promini but just for the first 4 motors (for BI - Quad)
would be nice if you can so some tests and report it here!
regards Felix
yes this mod works with the promini but just for the first 4 motors (for BI - Quad)
would be nice if you can so some tests and report it here!
regards Felix
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Me and henry caldwell ran the 400hz file a bunch yesterday and had good results but dont know if it was refresh rate or lower resolution that did it but we both have good results with it ! Henry has the flyfun 18 amp and i have the skywalker 20 amp ! I wished the gui had refresh rate and resolution adjustments in it where everyone could run what they want ! Go look at the xaircraft gui and look at these adjustments for esc's and you will see what i mean ! I honostly think it was the lower resolution that helped most !!
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
In light of this, I added fully user-configurable refresh rate for both servo and motor, which can be set to any period between 50 and 498Hz in the STM32 port. (actually, values could be more than that, but you get the idea).
This is thanks to the chip having proper PWM capture and generating hardware blocks, and no need to worry about bitbanging or wasting 8bit timers. Of course, this is with 1us resolution.
Isn't it about time you guys moved to a platform where generating PWM isn't a pain in the ass?
This is thanks to the chip having proper PWM capture and generating hardware blocks, and no need to worry about bitbanging or wasting 8bit timers. Of course, this is with 1us resolution.
Code: Select all
uint16_t motor_pwm_rate; // The update rate of motor outputs (50-498Hz)
uint16_t servo_pwm_rate; // The update rate of servo outputs (50-498Hz)
TIM_TimeBaseStructure.TIM_Period = (1000000 / init->motorPwmRate) - 1;
Isn't it about time you guys moved to a platform where generating PWM isn't a pain in the ass?
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
chris ables wrote:Me and henry caldwell ran the 400hz file a bunch yesterday and had good results but dont know if it was refresh rate or lower resolution that did it but we both have good results with it ! Henry has the flyfun 18 amp and i have the skywalker 20 amp ! I wished the gui had refresh rate and resolution adjustments in it where everyone could run what they want ! Go look at the xaircraft gui and look at these adjustments for esc's and you will see what i mean ! I honostly think it was the lower resolution that helped most !!
hi,
the resolution dosent changes for promini !
@ dongs
it is true that changing the refresh rate for 8 bit timer is a pain .. but its just the promini that runs PWM outputs with 8 bit! the mega and the 32u4 uses 11-16 bit .. for this ones it is quite easy to change.
no need for 200% power just for different PWM frequecys
regards
felix
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Thats cool , then the refresh rate did make a difference on mine ! I installed 8x4.5 props instead of the 9x4.47 that i had on it today and wow my quad feels locked on and great ! Just flew 10 min straight at 80% to full throttle whole time and it never wobbled or bogged ! I'll try and get henry to shoot vid of me this weekend to show ya'll ! Ronco i am very pleased that you made this 400hz output file and look forward to trying anything for you ! Just let me know if you need testing if it dont involve baro or mag !! I fly all aerobatics mostly other than just flying around easy to feel if locked in !!
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
but it also works with crius?
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
I have this problem with the new version of esc I bought. I have a Turnigy basic 18ahttp://static.rcgroups.net/forums/attachments/1/1/0/0/5/0/a4735396-140-IMG_8375.jpg), wmp original, promini arduino, 24g hextronic motors, 8x47 props, motor to esc connect with deans micro 4plug.
http://static.rcgroups.net/forums/attac ... G_8375.jpg
the copter will hover nice, and fly forward nice for a few moments, then it gets the shakes for about 20 seconds, then returns to smooth for a while. I have tried arduino code 1.9, 2.0, 2.0 with 400hz output and 2.0 with 400hz_2 output. None of them get rid of the shakes. Version 1.9 was unfllyable, it would eventually flip. Version 2.0 is flyable, but eventually gets shakes. PID does tame it down, but never eliminates. Even with low P and zero for I and D, still gets unstable. It seems like a small overshoot in the correction loop that eventually aligns and causes oscilating at a very low frequency(1-2hz range) then it subsides
I am at a loss now, going to try and fix my old esc (it needs a smd resistor that broke off, I hope) that these were to replace.
Sorry for no advice, but am just reporting my findings.
http://static.rcgroups.net/forums/attac ... G_8375.jpg
the copter will hover nice, and fly forward nice for a few moments, then it gets the shakes for about 20 seconds, then returns to smooth for a while. I have tried arduino code 1.9, 2.0, 2.0 with 400hz output and 2.0 with 400hz_2 output. None of them get rid of the shakes. Version 1.9 was unfllyable, it would eventually flip. Version 2.0 is flyable, but eventually gets shakes. PID does tame it down, but never eliminates. Even with low P and zero for I and D, still gets unstable. It seems like a small overshoot in the correction loop that eventually aligns and causes oscilating at a very low frequency(1-2hz range) then it subsides
I am at a loss now, going to try and fix my old esc (it needs a smd resistor that broke off, I hope) that these were to replace.
Sorry for no advice, but am just reporting my findings.
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
i tried the modded 400hz output.pde today.
quad x with mt2208 / 10A hw esc / 8" prop / mwc board with mpu6050 and promini.
used the actual mwc fw 2.0.
first with default output.pde. and directly after with the modded 400hz output.pde
there was absolutly no difference.
quad x with mt2208 / 10A hw esc / 8" prop / mwc board with mpu6050 and promini.
used the actual mwc fw 2.0.
first with default output.pde. and directly after with the modded 400hz output.pde
there was absolutly no difference.
- Crashpilot1000
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi !
I just tried your output2.zip on mwii 2.0. My ESC support 490 MHZ - so i just tried.
I was flying in my new quad (Robbe Roxxy 930, Hacker 20-20Evo, Promini & WMP & BMA 020 & BMP 085, 2k2 Pullup). After changing and saving the values (serial LCD config) the motors did not arm (i have ARM on a switch) - i reconnected the serial lcd and found that all the values were completely erratic (e.g. P 8,5 I 120 etc....). I pressed reset and dis/reconnected the Lipo - same problem. At home with the GUI i saw all values in eprom were wrong. I never experienced something like that before. I reflashed 2.0 with the original Output.ino. Can the garbled eprom be a result of your new output.ino? I am not sure, maybe its the LCD config part in 2.0, maybe its my setup/hardware. I will report if something like this happens again with the original 2.0.
(This was my 1st post here...)
Crashpilot
I just tried your output2.zip on mwii 2.0. My ESC support 490 MHZ - so i just tried.
I was flying in my new quad (Robbe Roxxy 930, Hacker 20-20Evo, Promini & WMP & BMA 020 & BMP 085, 2k2 Pullup). After changing and saving the values (serial LCD config) the motors did not arm (i have ARM on a switch) - i reconnected the serial lcd and found that all the values were completely erratic (e.g. P 8,5 I 120 etc....). I pressed reset and dis/reconnected the Lipo - same problem. At home with the GUI i saw all values in eprom were wrong. I never experienced something like that before. I reflashed 2.0 with the original Output.ino. Can the garbled eprom be a result of your new output.ino? I am not sure, maybe its the LCD config part in 2.0, maybe its my setup/hardware. I will report if something like this happens again with the original 2.0.
(This was my 1st post here...)
Crashpilot
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi guys,
I build a quadcopter based on the Crius board with 10A Hobbywing esc and MW 2.0
It flies just perfect.
So I build a bigger one with the multiwii mega board + Turnigy Plush 18A + KEDA 22 10 brushless motors + MW 2.0
It is just all over the place.
I have to struggle to keep it in the air. Heretic throttle response continuous corrections to be done.
Calibarted esc's serveal times, no joy.
Since the Turnigy 18A are 'sil', I cannot reflash them...
But I will certainly give it a go with the adapted output file (400Hz)
Hopefully some good weather this weekend to give it a try.
I will keep you posted...
I build a quadcopter based on the Crius board with 10A Hobbywing esc and MW 2.0
It flies just perfect.
So I build a bigger one with the multiwii mega board + Turnigy Plush 18A + KEDA 22 10 brushless motors + MW 2.0
It is just all over the place.
I have to struggle to keep it in the air. Heretic throttle response continuous corrections to be done.
Calibarted esc's serveal times, no joy.
Since the Turnigy 18A are 'sil', I cannot reflash them...
But I will certainly give it a go with the adapted output file (400Hz)
Hopefully some good weather this weekend to give it a try.
I will keep you posted...
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi,
I tested the 400Hz version but still no joy on strange quad behaviour.
Started again from scratch in balancing props and brushless motors.
Very nice result. Quad is airborn without any problem.
Heretic behaviour of the esc's was due to vibrations causing the gyro to get false readings.
Resulting in no constant (linear) output to the esc.
Lesson learned here: balance, balance and balance
Regards
I tested the 400Hz version but still no joy on strange quad behaviour.
Started again from scratch in balancing props and brushless motors.
Very nice result. Quad is airborn without any problem.
Heretic behaviour of the esc's was due to vibrations causing the gyro to get false readings.
Resulting in no constant (linear) output to the esc.
Lesson learned here: balance, balance and balance
Regards
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
I switched the esc with my old ones, had to fix a resistor that fell off. Tried to fly, no other changes. This was using mwc 2.0. It was still wobbly in flight, but not too sure if it was bad PID tuning. I reloaded 1.9 with stock value of PID, fly fine. ESC definately made a difference. These were HK SS 18a escs from last year. The new Turnigy Basic 18 will not work with pro mini Arduino hardware and any existing version of code.
I have however put together a new controller with a wmp and Arduino pro micro. It looks like it will work with the Turnigy Basic escs. Still building frame and mounting for gyro.
I have however put together a new controller with a wmp and Arduino pro micro. It looks like it will work with the Turnigy Basic escs. Still building frame and mounting for gyro.
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi there,
I built my first Quad with Turnigy Plush 25A and it was rock solid, I could throw it into the air and arm it in mid air and it leveled nicely.
After I lost it I rebuilt the exact same copter but used HK Super Simple, these ESC stopped doing the stress test by forcing one motor down rapidly and I had wobbles of death.
I now use Hobbywing Pentium 18A since they seem to be identic to turnigy plush but I still wobble of death and my copter twitches and looses height now and then.
Video: http://www.youtube.com/watch?v=6nFd-ZBJeNE&list=UUBhtBxdQEBLZ8pjLZXKnIHw&index=1&feature=plcp
Could this be connected to the 490hz problem??
Nils
I built my first Quad with Turnigy Plush 25A and it was rock solid, I could throw it into the air and arm it in mid air and it leveled nicely.
After I lost it I rebuilt the exact same copter but used HK Super Simple, these ESC stopped doing the stress test by forcing one motor down rapidly and I had wobbles of death.
I now use Hobbywing Pentium 18A since they seem to be identic to turnigy plush but I still wobble of death and my copter twitches and looses height now and then.
Video: http://www.youtube.com/watch?v=6nFd-ZBJeNE&list=UUBhtBxdQEBLZ8pjLZXKnIHw&index=1&feature=plcp
Could this be connected to the 490hz problem??
Nils
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi Nils,
i dont think that this is the 490hz problem .. eaven it isnt sure that there is a problem with 490hz.. warthox did some tests with no result.. so i think it is more the new versions of these ESC's (see http://www.rcgroups.com/forums/showthread.php?t=1608239)..
i have some good results with 16-bit PWM (promicro or mega) with ESC's that looks the same but from a different brand. i will do a cross test (8-bit vs 16bit) with these ESC's soon ..
regards Felix
i dont think that this is the 490hz problem .. eaven it isnt sure that there is a problem with 490hz.. warthox did some tests with no result.. so i think it is more the new versions of these ESC's (see http://www.rcgroups.com/forums/showthread.php?t=1608239)..
i have some good results with 16-bit PWM (promicro or mega) with ESC's that looks the same but from a different brand. i will do a cross test (8-bit vs 16bit) with these ESC's soon ..
regards Felix
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
ronco wrote:Hi Nils,
i dont think that this is the 490hz problem .. eaven it isnt sure that there is a problem with 490hz.. warthox did some tests with no result.. so i think it is more the new versions of these ESC's (see http://www.rcgroups.com/forums/showthread.php?t=1608239)..
i have some good results with 16-bit PWM (promicro or mega) with ESC's that looks the same but from a different brand. i will do a cross test (8-bit vs 16bit) with these ESC's soon ..
regards Felix
Hi Felix,
thank you for your answer, can you give me some more detail about the 8bit/16bit problem?
I fly a mega 2560
Nils
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Nils: I don't think the higher resolution is your problem (this only changes the number of "steps" in which the PWM signal can be modified), but likely the higher update frequency which 2.0 is driving the ESCs with. It looks as if your ESCs "choke" from the rapid succession of changes that are being sent from the controller.
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
The update Rate was changed in 2.0?
I thought it was 488Hz all the time...
Nils
so the fix could help here?
Nils
I thought it was 488Hz all the time...
Nils
so the fix could help here?
Nils
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
LenzGr wrote:Nils: I don't think the higher resolution is your problem (this only changes the number of "steps" in which the PWM signal can be modified), but likely the higher update frequency which 2.0 is driving the ESCs with. It looks as if your ESCs "choke" from the rapid succession of changes that are being sent from the controller.
hi,
the refresh rate dosent changes in 2.0 ! it is 488hz and it was 488hz..
i just changed the resolution for the mega. and this wont make problems.
@jevermeister its good to know that the 16bit resolution dont fix this ESC problem .. you may trie this 400hz mod .. would be good to know if this fix it.
to be sure that you have this "bad" ESC's, you may give us a foto of the FET's side.
regards Felix
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
jevermeister wrote:Hi there,
I built my first Quad with Turnigy Plush 25A and it was rock solid, I could throw it into the air and arm it in mid air and it leveled nicely.
After I lost it I rebuilt the exact same copter but used HK Super Simple, these ESC stopped doing the stress test by forcing one motor down rapidly and I had wobbles of death.
I now use Hobbywing Pentium 18A since they seem to be identic to turnigy plush but I still wobble of death and my copter twitches and looses height now and then.
Video: http://www.youtube.com/watch?v=6nFd-ZBJeNE&list=UUBhtBxdQEBLZ8pjLZXKnIHw&index=1&feature=plcp
Could this be connected to the 490hz problem??
Nils
My quad did this same exact thing and i was running 9x4.7 props . I switched to 8x4.5 props and problem went away! You may try smaller props for this ! Also if it's the same motor everytime it could be a bullet connector problem if you use bullet connectors ! I hardwire all my connections !
Last edited by chris ables on Tue Apr 17, 2012 11:35 am, edited 1 time in total.
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Ho do you know that the 16bit resolution do not fix my problem? _Is this new resolution in MW2.0??
I did the mistake of switching the asc AND the software without flying new ESC witho old software and the other way around.
I still need to learn.
I need a fix fast - I am about to order 5x Turnigy Plush 12A, they are available in HK Germany
I did the mistake of switching the asc AND the software without flying new ESC witho old software and the other way around.
I still need to learn.
I need a fix fast - I am about to order 5x Turnigy Plush 12A, they are available in HK Germany
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
chris ables wrote:jevermeister wrote:Hi there,
I built my first Quad with Turnigy Plush 25A and it was rock solid, I could throw it into the air and arm it in mid air and it leveled nicely.
After I lost it I rebuilt the exact same copter but used HK Super Simple, these ESC stopped doing the stress test by forcing one motor down rapidly and I had wobbles of death.
I now use Hobbywing Pentium 18A since they seem to be identic to turnigy plush but I still wobble of death and my copter twitches and looses height now and then.
Video: http://www.youtube.com/watch?v=6nFd-ZBJeNE&list=UUBhtBxdQEBLZ8pjLZXKnIHw&index=1&feature=plcp
Could this be connected to the 490hz problem??
Nils
My quad did this same exact thing and i was running 9x4.7 props . I switched to 8x4.5 props and problem went away! You may try smaller props for this !
I flew with 8" props already - the instability was there too :-/
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
jevermeister wrote:Ho do you know that the 16bit resolution do not fix my problem? _Is this new resolution in MW2.0??
yes it is.
do you tried it with 1.9? just to be sure it isnt that new resolution.
regards felix
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
ronco wrote:jevermeister wrote:Ho do you know that the 16bit resolution do not fix my problem? _Is this new resolution in MW2.0??
yes it is.
do you tried it with 1.9? just to be sure it isnt that new resolution.
regards felix
I will try that, but I had the Wobble of death with 1.9 too.
Maybe my min throttle is too high and this causes wobble of death?
Nils
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
i dont think that a high mintrottle do those problems ..
.. but i dont know it for sure!
regards felix
.. but i dont know it for sure!
regards felix
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
do you knwo if this mod give a real positive effect with multiwii 2.0, dys30A esc, kdea20-22L motors, and 2560 flyduino board ?
regards.
regards.
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Funny thing is, that I flew some rounds today and everything was fine
--> Loose connector??
--> Loose connector??
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
jevermeister wrote:Funny thing is, that I flew some rounds today and everything was fine
--> Loose connector??
Odd. If you did not change anything else, I suspect a bad solder joint somewhere. These are hard to spot, unfortunately.
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Might the increased refresh rate cause problems with my servos? I had planned to use two servos for my gimbal and either they can't read the signal or the pin definitions are incorrect for my flight controller. I tried changing the pin definitions with not success and now I am starting to wonder if it is a problem with the refresh rate.
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi,
all PWM refresh rates are just like thay was in all previus MWC versions! its just and only the resolution that changed in 2.0 and this also only for the mega.
regards felix
all PWM refresh rates are just like thay was in all previus MWC versions! its just and only the resolution that changed in 2.0 and this also only for the mega.
regards felix
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Ya, I ruled out that it isn't a refresh issue, the pin assignments need to be changed but I haven't figured that out yet.
- jevermeister
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Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Hi there,
I just tested this mod regarding my wobble of death problem.
The 400Hz mod does not fix that. So my problem lies elsewhere - DAMN!
Nils
I just tested this mod regarding my wobble of death problem.
The 400Hz mod does not fix that. So my problem lies elsewhere - DAMN!
Nils
Re: Run MultiWii @ 400 Hz - Very Important - ESC - Solution!
Just a loose connection?