HK Bushmaster with OrangeRX RX3S

etopsflight · Post by **etopsflight** » Mon Mar 02, 2015 2:28 am

Guys

Trying to set up a HK Bushmaster with the OrangeRX RX3S Stabilization receiver on my Fly Sky FS-TH9x with ER9X firmware. The Rx has channels for Throttle, Rudder, Elevator, Aileron Left, Aileron Right, Gear and Aux.

At the moment I am trying to setup each servo including ailerons and flaps on individual channels. While this Rx has ports for Aileron Left and RIght, cannot get the Rx to control the ailerons as normal. Currently they work as elevators, both deflections are the same direction and not opposite as required. Also, cannot get the LH and RH flaps to work at all when connected to Gear and Aux channels respectively.

Can anybody help me out what mixes I should be using for the ailerons and flaps please? Thanks in advance.

Cheers
Etops

Post by **MikeB** » Mon Mar 02, 2015 11:26 am

If an aileron servo is moving the wrong way, go to the LIMITS menu and, on the channel you need to reverse, change the entry at the right from "---" to "INV".

Which control (pot or switch) do you want to use to control the flaps?
Assuming the GEAR and AUX channels on the Rx are channels 6 and 7 then add the following mixes to these channels to use pot P1.
CH06: +100% P1
CH07: +100% P1

Mike.

etopsflight · Post by **etopsflight** » Mon Mar 02, 2015 12:19 pm

MikeB

Thanks for your reply.

I managed to sort out my aileron problem by using the easy way out and utilised the included Y Harness.

The flaps problem I want to use on the Gear channel as the Aux channel is used for switching on/off the gyro. I want to use the Gear switch for flaps; using Y harness, so I can get 3 settings, 1) clean config position 0, 2) position 1 and 3) position 2. How would I do that and how can I mix some down-elevator with flaps to keep the plane from ballooning?

Cheers in advance.

Etops

Post by **jhsa** » Mon Mar 02, 2015 12:39 pm

Here, the manual..

viewtopic.php?f=5&t=6473

At the end, Annex A, there is an example that moves the elevator down when you open the throttle. You can do the same using the flaps.. You need to mix a little bit of the flaps channel to the elevator channel so when you lower the flaps you also lower the elevator's center point.. But read the manual, specially the "Mixer".

João

Daedalus66 · Post by **Daedalus66** » Mon Mar 02, 2015 3:51 pm

Since you are using a stabilizer, you can't do any transmitter mixing that involves the stabilized channels. Consequently, you need to either use a Y-cable, as you are now doing, or use internal mixing capabilities of the stabilizer (I can't remember offhand whether the Orange does this for dual ailerons), or simply pass just right aileron through the stabilizer and drive the left aileron directly. Apparently, this last approach, which means only one aileron is stabilized, works quite well, but I haven't tried it.

deaconFlyer · Post by **deaconFlyer** » Mon Mar 02, 2015 3:56 pm

I had the same problem. Fortunately, in my "old stuff" box, I had a servo reverse cable, which fixed the problem after I inserted it into the line.

That said, I too went to a Y-harness because I was not using any differential values on the ailerons ... what I thought I would like to do made no difference at all. Simple is always better.

Post by **jhsa** » Mon Mar 02, 2015 4:02 pm

I think we might need an open source stabilizing system.. Maybe the oXs could do it??

Post by **Kilrah** » Mon Mar 02, 2015 4:13 pm

There's already at least one if not more open source firmwares available for the Orange unit. Don't have names at hand, but shouldn't be hard to find.

Post by **jhsa** » Mon Mar 02, 2015 4:25 pm

Yes, but we have to BUY the orange unit.. If the oXs could do it, we could build our own.. That's the point

DIY..

João

Post by **jhsa** » Mon Mar 02, 2015 4:31 pm

To continue this discussion, I have opened another thread..

viewtopic.php?f=86&t=6774

João

Post by **Kilrah** » Mon Mar 02, 2015 7:24 pm

jhsa wrote:Yes, but we have to BUY the orange unit.. If the oXs could do it, we could build our own.. That's the point
DIY..

You can obviously also build your own compatible hardware if you want.

Post by **jhsa** » Mon Mar 02, 2015 10:36 pm

Right.. Conversation is on the other thread now

This one is about something else..

João

etopsflight · Post by **etopsflight** » Tue Mar 03, 2015 2:22 am

While my aileron problem has been solved, now remains the flaps problem.

I have centered the flap servos using a servo tester. The servo horns are not the same and differ in angle after i attach the horn. Having plugged in the flap servos into the the Rx and turned on the Tx, the servos move aft towards the flaps, their angles differ slightly.

I have used the following mix on Channel 5 incorporating the Aux switch using the 3 positions as follows:-

CH5 0 FULL ID0
+ -30 FULL ID1
+ -45 FULL ID2

I cannot get the flap surface flush (clean config) when I change the values for ID1 and ID2, wihtout having to change the values for ID0 also. Can anybody comment on the mixing parameters that I have set and if possible explain the correct way to set flaps for the Tx and the aircraft side. Not sure where I am going wrong. This is my first aircraft with flaps, I have previously mixed flaperons with all my bank and yank aircraft.

Cheers in advance.

Etops

Post by **Kilrah** » Tue Mar 03, 2015 8:50 am

You need to use HALF, not FULL.

Post by **MikeB** » Tue Mar 03, 2015 9:13 am

Or use the REPLACE multiplex on the ID1 and ID2 lines.

Mike.

etopsflight · Post by **etopsflight** » Tue Mar 03, 2015 12:06 pm

Kilrah

What is the difference between FULL and HALF?

I have found that setting FULL makes my horns travel aft towards the flaps. The control horns for flaps included in the kit are too short if the servo arm in centered. Is there any adverse effect using FULL in lieu of HALF. This seems to work for me but I have not maidened the plane yet.

Any advice? Thank you.

Regards
Etops

Post by **MikeB** » Tue Mar 03, 2015 12:44 pm

Page 29 of the manual linked to above describes the difference.

You can also use the switch as a source to a mix. Exactly how you edit this will depend on the revision of er9x you are using.
r816 just shows them in sequence in the mix sources.

If you use the ID0/1/2 switch as a mix source then the default output of the mix is -100% for ID0, 0% for ID1 and +100% for ID2.
An easy way of then getting the servo positions you want is to use a curve. Set the curve values corresponding to -100, 0 and +100 to the positions you want.

Mike.

etopsflight · Post by **etopsflight** » Wed Mar 18, 2015 12:56 pm

Mike

Got another problem regarding the mixing of the Channel 6 or Aux channel to turn the gyro function on/off. I have tried every permutation I can think of, but so far been unsuccessful. I want to use the Gear switch to operate the on/off function of the stabilizer. What do I choose and source and what is the multiplier?

Cheers
Etops

Post by **jhsa** » Wed Mar 18, 2015 1:20 pm

I don't know what value the stabilizer is expecting from the channel to turn ON/OFF

But you can try 2 BASIC mixes that are well described on the manual

CH6 100% sGEA

or

CH6 100% FULL switch (GEA)

These are the most basic mixes you can do with er9x.

João..

Daedalus66 · Post by **Daedalus66** » Wed Mar 18, 2015 4:47 pm

In almost any case, the stabilizer will have a switch over point somewhere in the pulse width range 1100 to 1900, because this corresponds to. -/+ 100% on most transmitters such as Spektrum. On the open source transmitters, this same range of 1100 to 1900 corresponds to -/+ 80%.
All this to say that, as Joao suggests, the usual way to control an on/off function such as stabilization is to set a switch to provide full -100% and +100% outputs (half would be 0% and 100%).
There is a caveat, though. Some systems (Spektrum SAFE is one) don't like a pulse width range much greater than the Spektrum 100%. If they see pulse width values of 1000 or 2000us, they may do funny things. So it's safest when dealing with systems designed on Spektrum standards to set any open source firmware transmitter (Taranis, 9XR, upgraded 9x) to limits of 80% for the switches, just as you do to prevent servo jamming on the primary flight controls of a UMX model.

Post by **jhsa** » Wed Mar 18, 2015 6:12 pm

Yep, as Nigel said.. I did forget it was Spek type equipment

João

etopsflight · Post by **etopsflight** » Wed Mar 18, 2015 8:25 pm

Joao

Thanks for your help. I used the second mix you suggested and the Stabilizer on/off function now works great. Sorry for being a noob!

Can't wait to fly the plane again but awaiting a servo for the elevator, which died on me during the last flight.

Cheers
Etops

Post by **jhsa** » Wed Mar 18, 2015 10:38 pm

We all must start somewhere.. That is why me and Nigel spent all that time updating the manual, to make your life easier while learning.. I am still learning

João

Daedalus66 · Post by **Daedalus66** » Thu Mar 19, 2015 3:55 am

Learning, and doing stuff with what you learn, is most of what life's about. Stop learning and you might as well give up. My great uncle was an electrical engineer who worked for George Westinghouse in Pittsburg in 1910. He was still designing electric motors at age 93, but had to quit work when he lost his driver's license. I'm working on lasting that long.

Nigel

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