Setting min throttle on a switch.

[Rusty105]

OK, read this somewhere and it sounded like a good idea. I have a mini quad that when diving from some altitude I would like there to be a minimum throttle so there would be some control. I have a tgy 9x radio with er9x, I figured something like this would work. Using the throttle cut switch, when in the off position the throttle stick range is -100 to +100 , when the throttle cut switch is active, the throttle range is -80 to +100. This way even if I bring the throttle all the way back it does not go to zero, BUT once the stick is above the -80 (or other pre set number) the stick acts normal. This way I don't accidentally disarm the flight controller, and maintain control when diving

[MikeB]

Set up a custom switch:
S1: THR < -80 (and) AIL
(The AIL is an 'and' switch, set in the rightmost column.
This switch will be on when the throttle is below -80 and the AIL switch is on.

Now add a mix on the throttle channel
R -80 FULL switch(SW1) (NOTE: the multiplex is set to REPLACE)

When the SIL switch is ON and the throttle goes below -80, this mix replaces the normal control and holds the throttle at -80%.

Mike.

[jhsa]

Use a curve.. But shouldn't the flight controller allow to adjust the min throttle?

João

[Rusty105]

Use a curve.. But shouldn't the flight controller allow to adjust the min throttle?

João

Sometimes I would like the motors to stop as well. I am not a fan of the motors spooling up as soon as I arm the flight controller.

[Rusty105]

Set up a custom switch:
S1: THR < -80 (and) AIL
(The AIL is an 'and' switch, set in the rightmost column.
This switch will be on when the throttle is below -80 and the AIL switch is on.

Now add a mix on the throttle channel
R -80 FULL switch(SW1) (NOTE: the multiplex is set to REPLACE)

When the SIL switch is ON and the throttle goes below -80, this mix replaces the normal control and holds the throttle at -80%.

Mike.

This worked , although I think you messed up the first part, or my version of er9x is different I have it set up as
Custom Switch (switch is active only when the throttle cut switch is on)

Code: Select all

v<ofs   THR   -65   THR

Mix on channel 3

Code: Select all

 R   -65   FULL   SW1

I will have to play around and see if -65 is the point I want, but that is a flight tuning issue.

Thanks!

[MikeB]

I missed you wanting to use the throttle cut switch, probably because on my electrics I ALWAYS use the throttle cut switch as a safety switch to prevent the motor(s) starting if I accidently move the throttle stick.

If you need to tune the -65 value, you can use a GVAR to tie this to one of the pots, then you can adjust this in flight.

Mike.

[jhsa]

Sometimes I would like the motors to stop as well. I am not a fan of the motors spooling up as soon as I arm the flight controller.

I use a multiwii controller on both my tricopter and quadcopter and I can configure it to turn motors on/off using a switch.
Also in multiwii as far as I remember (it has been a while since I messed with it ), there is an option to adjust the idle speed when you arm the motors and also the minimum speed that the motors respond to control inputs.

João