Sticky T-Cut Throttle

Flaps 30 · Post by **Flaps 30** » Tue Dec 27, 2011 6:23 pm

I am trying to set up the throttle, so that it has a fail safe. It is easy to do in a simple way by programming up a switch to replace the value set by the throttle, and in doing so deactivate the stick.

What I am looking for is some mix where on switching the stick back on, that you have to set the stick to zero before it becomes active again. This will make it doubly safe if the throttle is on some other setting other than zero and the switch is turned off, which would normally mean that the motor would instantly go to what the throttle setting is.

Hope that makes sense.

G550Ted · Post by **G550Ted** » Tue Dec 27, 2011 7:06 pm

Use the "Sticky T-cut" template in eePe. That's what it does.

Ted

Flaps 30 · Post by **Flaps 30** » Tue Dec 27, 2011 8:53 pm

G550Ted wrote:Use the "Sticky T-cut" template in eePe. That's what it does. Ted

I'm afraid that the information you have given me is meaningless. I don't have any templates in the version I have loaded onto my transmitter. I did look around to see if anyone had posted a mix, and I came up empty on that. Hence why I am asking here for some help or a pointer to it.

Post by **MikeB** » Tue Dec 27, 2011 9:12 pm

Ted did say look in eepe for the template, not er9x. The templates are always available on eepe even if you have loaded a NO-TEMPLATE version of er9x.

Mike.

Post by **Crucial** » Tue Dec 27, 2011 9:18 pm

For an explanation of how it works along with an eepe file to use as an example look here.
http://er9x.googlecode.com/svn/trunk/do ... amples.zip

It is under Throttle Hold and is the 3rd example. There are 4 total examples of a throttle hold and each one is on a separate channel.

Flaps 30 · Post by **Flaps 30** » Tue Dec 27, 2011 9:25 pm

Now it makes sense. Thanks guys. You are all stars.

Scott Page · Post by **Scott Page** » Wed Dec 28, 2011 4:03 am

EDIT** brain fade. sorry

Post by **Crucial** » Wed Dec 28, 2011 7:02 am

He was looking for the sticky throttle cut. The safety switch does work for a standard cut but it's not sticky.

papa_lazerous · Post by **papa_lazerous** » Sun Jan 08, 2012 7:56 am

Just a quick question which is kind of related to the original post about throttle cut.

Do you think it would be possible to set a throttle cut to go to a specified amount of throttle but using the sprung loaded trainer switch where once the switch is flicked the throttle is cut and it stays that way until the trainer switch is flicked again? I am trying to get it to work right now and I am missing something in my brain to understand it fully lol

wheelspinner20 · Post by **wheelspinner20** » Sun Jan 08, 2012 7:45 pm

Trainer is just a momentary. So the controller chip only acts on its real time position... either open or shorted. I think this would be tricky.

Are you out of switches? whats the specific application, this might help the experts to come up with a happy medium!

Pat

Post by **MikeB** » Sun Jan 08, 2012 9:24 pm

papa_lazerous wrote:Do you think it would be possible to set a throttle cut to go to a specified amount of throttle but using the sprung loaded trainer switch where once the switch is flicked the throttle is cut and it stays that way until the trainer switch is flicked again? I am trying to get it to work right now and I am missing something in my brain to understand it fully lol

It may be possible, it will use a lot of custom switches. However, I'm not sure it's a good idea, as you can't guarantee which way (cut or not cut) it starts in, and no obvious indication which way it currently is. Please detail your requirement fully.

Mike.

jsfrancal · Post by **jsfrancal** » Mon Aug 13, 2012 3:42 pm

Somewhat old but interesting topic, here is a new idea.

The EEPE example 3 has a solution using 2 custom switches and 5 mixes (!).
This is fine if you have plenty of mixes available, but if you're mix bound and not switch bound, any mixing freed up is helpful.

Here's an idea to get sticky throttle cut using only the one basic throttle mix (freeing 4 mixes with respect to initial example), a safety switch and 3 custom switches, only one more than the original example.

Set your throttle channel to 100% THR
Set your custom switches as follows:
- CswitchA:AND THR SWB
- CswitchB: OR SWA SWC
- CswitchC: v<ofs THR -95
set throttle channel safety switch to : !SWA -100

This assumes you start out with TH switch OFF (= assumed throttle cut position) which is the default after er9x warnings (additional safety in operating this way). You need to turn TH ON and run throttle stick below -95 (in no particular order) to start using throttle stick normally, else the safety switch remains active.

Explaination:
SWC is triggered when the THR stick is < -95.
SWA and SWB act as the memory of (THR stick < -95 and THR switch on):
SWB is triggered if THR stick is < -95 OR if (THR stick < -95 and THR switch on) was previously observed (SWA).
SWA is triggered if the THR switch is on AND if SWB is ON (bootstrapped in particular when THR stick < -95). SWA goes OFF as soon as THR switch is OFF, so should SWB.

I don't see why this wouldn't work but I'm getting strange results under eepe (v347): when I start eepe fresh it works at advertised, but sometimes after several modifications and simulator runs, it seems buggy as the switches A and B seem to go ON when I flick THR ON (and erratically go ON/OFF without any user intervention), even though the throttle is not at idle position. I don't see a good reason for this. I'm trying to figure out if my logic is flawed and incomatible with the eepe/er9x switch evaluation process, or if this is an eepe bug.

Any idea? Anybody want to test this?

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