This is the new folding frame Project I am working on.
Can anyone tell me if it´s possible to control the eight counter rotating motors with ACM.
@ Ike: The developmet is made with SolidWorks.
This was also my first thought but of the coax config I will los the Yaw effect.
I think eight is supported by the ArduPirates code.
ACM will start with quad and tri support
NICE render, love SolidWorks .. You should ask Jason for 8X frame support :) There is many free out-put pins left on the APM, so may be you can use some, I guess...
When you will have it ready for a spin ??
And can you share more info on that frame ???
IINM ArduPirates code use I2C ESC for OCTO frame.
Actually ACM has full support for Tri, Quad and Hexa's already.
For coaxial setups you should have separate control for all 8 motors due lower motors needs to run with slower and optimized speed or you waste a lot of mAh's for fighting against the wind.
Using 8 PWM outputs from APM is a bit tricky due hardware issues. OUT5-6 cannot be used to Fast PWM due hardware issues on microprosessor.
I2C is also a bit tricky to use due if one I2C fais they all fail. This is due I2C bus.
We are working on UART based ESC's that are safer to use in 8+ configurations. No real ETA for those.
good to read what you write.I am planning on buildiung a Y6 (so 6 motors working coaxially) Will that be possible with ACM at a later point? Will it be possible to adjust the motorspeeds singally to give the bottom more speed?
your configuration with the top/bottom esc's together on the signal side will work for Roll, Pitch and Throttle but not for the Yaw because you need the turning moment of the motors and with counterrotating motors you don´t have any turning moment.
I'm guessing (and it really is just that, a guess!) that the yaw issue depends on whether you have CCW/CW CW/CCW or a matching CW/CW CCW/CCW propeller arrangement on each arm. It might be worth swapping one set (either top or bottom) of motors/props along one (so front right becomes back right) in order to see if this works better?
I may well be wrong on this but, my thinking is if you have a top and bottom motore that cancels the torque effect of eachother out, then you will loose yaw effect. If they compliment, you wont?????
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