Building a Trex 450 dominator. Wiring questions.

[Mr Twister]

Evening all.

This is my 1st build so please bear with me.

A while ago i baught a 450 Dominator and so far its going together ok.

Have just started wiring the electrical components together now.
Thing is, this model didnt come with a reciever. So after asking the question i baught a Spektrum SPM9645 DSMX with adapter wire.
How does it connect up?
The diagram in the build manual shows the esc and 2 other sets of wires (from the microbeast) connecting to the reciever.
But the reciever only has a single 3 pin connector port on it.
Am i missing something?

Cheers

Rich

[Grumpy]

This is how to connect a satellite receiver to the Microbeast:

Note that the wires marked 'Power supply' and 'CH6 additional channel' are optional, you wont need anything connected in those positions.

[Mr Twister]

Brilliant! Thank you.
Made it easy for me.

Cheers.

[kenny d]

Just Incase you didn't know you need a special adapter cable

NEW Spektrum Satellite Adapter Cable For Connect TO BeastX MB RC Helicopter

[Mr Twister]

Cheers. Yeh,Got the cable.

[Mr Twister]

Morning all. Another day, another question lol.

Ok. A couple of questions.
The heli is almost wired up now but still have more questions to ask.

On the microbeast unit there are gain control adjusters. What are the purpose of these? Do they adjust servo speed or is there more to it than that? Where would be a good place to set these initially?
Also in the instructions it seas not to mount the reciever to close to the microbeast. Ive mounted the reciever about 2 inches below it just behind the battery carrier. Should this be ok?

Also, initially i want to set the heli up for straight forward flight for now. No excessive banking or 3D. Using my Blade for that.

Thanks again.

Rich

[kenny d]

For set up try normal or sport
as for the 3 pots I leave them about 12 O'clock
assuming the oxy is 2 blade & not 3 blade , I would check the tail is free in movement
disconect the push rod at the servo & make sure it's not binding at all
if it's not then adjust your gyro gain , when you connect a battery the unit goes through a check mode
at this point the lights indicate the amount of gain you have selected or check your transmitter
i have read that the 3 blade can more difficult to set up

[Mr Twister]

Thanks for replying .
Whats an oxy?
Im 99% done with the wiring now. Ive mounted the reciever below the main gear but the wire to the reciever is quite long. Is it ok to have the wire tied together like a 2 inch sausage,hidden away. Or does it need to be out and straight, ie run it down the tail boom and back?
Any ideas?

Rich

[Grumpy]

Whats an oxy?

It's a mini size heli made by Lynx, I've no idea why it was mentioned in the context of this thread, just a mistake I guess.

Is it ok to have the wire tied together like a 2 inch sausage,hidden away.

It's ok to bundle the wires up.

[Mr Twister]

Thanks Grumpy. I'll try and source a shorter cable for it at some point. But it'll have to do for now.
Got everything i need for it now so ill be setting it up soon.
More questions to come i dare bet.

Rich

[kenny d]

Yes , sorry I got the threads mixed up , nothing to do with oxy3 , I think that thread was about a tail wag

[Peteski]

On the microbeast unit there are gain control adjusters. What are the purpose of these? Do they adjust servo speed or is there more to it than that? Where would be a good place to set these initially?

Don't take this the wrong way, but you really should read the user manual as it does clearly explain what all the rotary pots do. I found the user manual invaluable in setting up my first Microbeast, it's pretty well written and doesn't leave too many questions. It suggests starting settings for a 450 sized heli too. Just follow the user manual setup guide word for word and it will fly fine. If you try to short cut the setup, you will almost certainly get it wrong and end in a crash.

[Grumpy]

I think one of the problems with many user manuals (I'm not sure about the Microbeast one) is that they assume a certain level of experience of the reader. For instance they might tell you how to adjust the gain pots, but they don't explain from first principals what 'gain' actually is. There is a whole raft of terminology associated with RC and helicopters that must be totally baffling to most newcomers.

Anyway to answer the original question.. 'gain' adjusts how strongly the gyros (and therefore the servos) respond to movement of the heli. If you put gain at zero then the gyros would not respond at all to heli movement (you effectively turn the gyro off). If gain is too high the gyro will over compensate leading usually to an oscillation, sometimes very violent. It's best to start with the gains at a lowish value and gradually increase rather than going in too high. The manual should give you some guidance on where to start but it varies a lot from one heli to the next based on heli size, mechanical setup and a bunch of other variables.

[Mr Twister]

Ok. Anybody able to me how to bind my dx8 to the microbeast plus (SPM9645 DSMX reciever) please? Im starting to think ive baught myself an over priced ornament

[600srad]

As per peteski, google and download the microbeast quickstart guide, the second chapter is where you need to look,
Then google and download the full manual, very easy to follow step by step guide, that will walk you through the whole set up