How to create a "sticky" throttle hold.

If you use the CH3, it means that you don't have to worry about anything else that may be done later. For instance, my Phoenix config uses a switch to toggle between "airplane sim" and "copter sim". In the former, FMODE is just a 3-position switch, and doesn't affect the throttle at all. Using CH3 there means it works in either mode.

Thanks, that makes sense. I also just downloaded your phoenix model since I've been struggling to make it work with copters, so thanks again!

I'm trying to add Fabien's throttle hold to my Devo7e models but can't make it work somehow.

Anyone over here who would share a working model file so I can have a closer look?
I'm using v4.0.1-4795163 in a 2x2 modded Devo 7e

Thanks in advance.

-mike-

can anyone get fabiens settings to work on a 7e with a recent build? as i have confirmed mike's findings that the theird mixer page doesn't get saved no matter what i try and do. i think this may be because the source is set to none but i'm not sure? so again can anyone get this working on a recent build?

thanks for the info FDR was this a change in behaviour since fabien first posted this method? as i'm sure others must have tried it before now?

FDR, Thanks for clarifying!

Works like a charm now.
I really tried to change the source from ELE to none.

-mike-

Here all needed settings to make Fabien's sticky throttle hold work for Devo 7e users.

I want to thank Fabien for this ingenious piece of work!

This example is meant for sticky hold is assigned to throttle hold switch, activated when switching down.

Go to THR in mixer menu:
Mixer: simple

Safety = Virt1
Safe Val = -150 (the Min Limit you use,
see line below in display)

Then go to virtual channel 1
in mixer menu

Virt1 = Complex
mixers = 3
Page 1:
Switch = None
Mux = replace
Src = this virtual channel (Virt1 for me)
Curve = Min/Max
Scale = 100
Offset = 0

Page 2:
Switch = None
Mux = add
Src = THR
Curve = 1-to-1
Scale = 100
Offset = -1

Page 3:
Switch = HOLD1
Mux = replace
Src = AIL (that is standard offer)
Curve = Fixed
Scale = 100
Offset = 0

Save and you are done.

-mike-

For 3D beginners, the original setup has a drawback: in 3D mode (usually both FMODE1 and FMODE2), moving the throttle stick all way down does not set the throttle at minimum; instead, the throttle is usually at maximum. This could be pretty dangerous. The purpose of the sticky TH is to ensure that TH could ONLY be turned off when the motor will not spin, while this is never true in FMODE1 and FMODE2 regardless the position of throttle stick.

Hence, I've enhanced the setup a little bit so that the TH can only be turned off in FMODE0. The enhanced setup is different from the original one only for virt1 (identical for virt2):
virt1

• Type: Complex (not "Simple")
• Mixers: 2

Page 1:

• Mux: replace
• Switch: FMODE0
• Src: THR
• Curve: 1-to-1
• Scale: -50
• Offset: -49

Page 2:

• Mux: replace
• Switch: !FMODE0
• Src: None
• Curve: Fixed
• Scale: -1
• Offset: 0

To explain the setting briefly: in FMODE0, the mixer is identical w/ the original one, which means the output is greater than 0 only when the stick is all way down. In FMODE1/2, the output is ALWAYS -1.

Hope this is useful for people like me

Yeah, we noticed that and provided fixes in the thread a while back. Fabian did a nifty version using just one virtual channel as well.

I've updated the original post to include Fbian's method instead of the one with two virtual channels you started on.

My apologies for not doing so earlier.

I use a Devo 7e to control a car with forward and reverse.
Could someone please tell me how to set sticky throttle hold so that the throttle stick needs to be at 35% to release hold.
Reason being that when I turn off throttle hold with the throttle stick down the car goes reverse.

Cheers Gerry

Hi Gerry,
I have a workaround that will allow sticky throttle to disengage at 35%.
Here's the ini file garb...

[channel3]
safetysw=Virt5
safetyval=-110
template=simple
[mixer]
src=THR
dest=Ch3


[virtchan5]
name=St-THold
template=complex
[mixer]
src=Virt5
dest=Virt5
usetrim=0
curvetype=min/max
points=0
[mixer]
src=Ch3
dest=Virt5
offset=-70 ;<edit this number... -70 will disenage at 35% throttle.
usetrim=0
muxtype=add
[mixer]
src=AIL
dest=Virt5
switch=HOLD1
usetrim=0
curvetype=fixed

Anyhow thats it, bud. Hope this solves your problem.
Happy modeling!

Thanks rjmcewen,
I tried this and some variations of what I thought would work and it does almost do what I want. With this config and anything else I have tried I can get the sticky throttle to disengage at 35% OR LOWER, problem is I can't figure how to make it so it only works at 35%.

Cheers