I got a Second Hand MX 400 but no Instructions on how to pro

[Kushal_22]

I need some Help Programng in Parameters I have NO idea at all. The last time i did one for the CP Pro i lucked out and happend across Some kind souls Parameters that he was sharing. I do not think i can use those ones though as this RX I have Now is CPPM. I have no idea if this makes a difference or not(In the Programing) If Someone could point me in the right Direction that would be wonderfull. I have a Futaba 9C (Heli one of course)

Thanks
Mal

[vera]

Here's a link to the MX400 manual.
http://manuals.hobbico.com/hmx/hmxe0200-manual-v2.pdf

Here's the Pro version.
http://manuals.hobbico.com/hmx/hmxe0205-manual.pdf

However, neither of them seem to be CCPM.


this RX I have Now is CPPM


I dont think I understand. Maybe you mean, PCM. Your Futaba 9C can sent either PPM or PCM. So if your RX is PCM you can deal with it. By default, the TX goes to PPM mode. You can easily change it. You have to cycle power after you do that to make it send the right stuff.

As far as the programming goes, it doesn't matter if you're using PPM or PCM. PPM stands for "pulse position modulation" and PCM stands for "pulse code modulation". This just relates to the nature of the radio signal, and either one gets the info to your servos. PCM is less suseptable to electrical interference. If your heli was all set up for PPM and you changed the receiver to PCM, all you have to do is tell the TX to use PCM then recycle TX power.

If I understand correctly, you have setup info for the heli, from someone else's heli. That might be ok, but your heli might be a little different. It might be a good idea to go through the setup. Apparently the manual came with a cutout pitch guage. You could make one or buy one, but it would be good to check the setup on your heli and you'll need a pitch guage to do that.

I'm not sure I answered your question... but if it's whether or not the transmission mode, PCM or PPM, makes any difference regarding the other setup parameters, it should not.

In case you're interested, with PPM the TX sends a string of pulses, one for each channel, and the witdth of the pulse indicates where the servo should be. With PCM the TX sends an "address" indicating which servo it wants to update, along with a coded digital value for that address. The RX converts that into a pulse width and sends that to the servo. So the info to the servo is the "same" either way. Well, should be the same, but there is room for some difference. I'd check the setup.

[Kushal_22]

Here's a link to the MX400 manual.
http://manuals.hobbico.com/hmx/hmxe0200-manual-v2.pdf

Here's the Pro version.
http://manuals.hobbico.com/hmx/hmxe0205-manual.pdf

However, neither of them seem to be CCPM.


this RX I have Now is CPPM


I dont think I understand. Maybe you mean, PCM. Your Futaba 9C can sent either PPM or PCM. So if your RX is PCM you can deal with it. By default, the TX goes to PPM mode. You can easily change it. You have to cycle power after you do that to make it send the right stuff.

As far as the programming goes, it doesn't matter if you're using PPM or PCM. PPM stands for "pulse position modulation" and PCM stands for "pulse code modulation". This just relates to the nature of the radio signal, and either one gets the info to your servos. PCM is less suseptable to electrical interference. If your heli was all set up for PPM and you changed the receiver to PCM, all you have to do is tell the TX to use PCM then recycle TX power.

If I understand correctly, you have setup info for the heli, from someone else's heli. That might be ok, but your heli might be a little different. It might be a good idea to go through the setup. Apparently the manual came with a cutout pitch guage. You could make one or buy one, but it would be good to check the setup on your heli and you'll need a pitch guage to do that.

I'm not sure I answered your question... but if it's whether or not the transmission mode, PCM or PPM, makes any difference regarding the other setup parameters, it should not.

In case you're interested, with PPM the TX sends a string of pulses, one for each channel, and the witdth of the pulse indicates where the servo should be. With PCM the TX sends an "address" indicating which servo it wants to update, along with a coded digital value for that address. The RX converts that into a pulse width and sends that to the servo. So the info to the servo is the "same" either way. Well, should be the same, but there is room for some difference. I'd check the setup.

Thanks for the Info. It sounds to me as if my LHS is giving me alot of Hooey and selling me stuff i do not really need. From what you have told me i would have done Just fine using a Berg 7 RXfor 80 bucks rather than this Hitec for 130 bucks :arggg:

I Thank you for all your help and when i get stuck i will post :wink:
Thanks agian

Mal

[vera]

Well, the TX and RX should agree on the number of channels and the transmission mode. Your 9C TX can do either PPM or PCM but you can't change the number of channels on it or any RX that I know of. Also I don't know of any RX that is switchable between PCM and PPM. If you still have your Berg 7 you might try it, but I don't think it will work. Your Berg is a PPM RX and your 9C can talk in the PPM mode but your TX will be sending 9 channels of info and I don't think the Berg will correctly decode it because it's expecting only 7 channels. If you test it I'd be interested in knowing how the test turns out.

[Kushal_22]

Well, the TX and RX should agree on the number of channels and the transmission mode. Your 9C TX can do either PPM or PCM but you can't change the number of channels on it or any RX that I know of. Also I don't know of any RX that is switchable between PCM and PPM. If you still have your Berg 7 you might try it, but I don't think it will work. Your Berg is a PPM RX and your 9C can talk in the PPM mode but your TX will be sending 9 channels of info and I don't think the Berg will correctly decode it because it's expecting only 7 channels. If you test it I'd be interested in knowing how the test turns out.

OHH.....OK. From what you are saying then when i am flying a 4 servo plane it is different than flying a 4 servo Heli because of the Gyro? Its not really how many servos but rather how many channels you have to use? I am just a little confused as guy`s have been using the Berg 7 on Micro Heli`s (Or so i have been informend and went and bought one for my CP Pro) Now the MX 400 is just bigger than my cp pro.....but maybe i am mising something? Remember i am a Noob and am in no way trying to make a argument just asking questions trying to learn.

Thanks Mal
PS I hope i don`t fustrate the HE Double Hockey sticks outta ya with all my Questions and noob inexperiance

[PTFlyer]

You should be able to use that berg7 with that TX without a problem.....

With the Berg 7 you can even Map ch 8 and 9 using a "castle link" (sold separatly)
if you needed.....

But a 7ch RX will work just fine and do everything you need it to do to fly that heli....

I use a berg7 on my sjm400 and works fine..

[Seeker]

Well, the TX and RX should agree on the number of channels and the transmission mode. Your 9C TX can do either PPM or PCM but you can't change the number of channels on it or any RX that I know of. Also I don't know of any RX that is switchable between PCM and PPM. If you still have your Berg 7 you might try it, but I don't think it will work. Your Berg is a PPM RX and your 9C can talk in the PPM mode but your TX will be sending 9 channels of info and I don't think the Berg will correctly decode it because it's expecting only 7 channels. If you test it I'd be interested in knowing how the test turns out.

The number of channels on the Rx does not matter. The Tx will just run the first X number of channels the Rx has. So, you can run a 4 channel reciever using a Tx with more channels.

[Kushal_22]

Hmm Yeah OK Great. I just may send this otherone back then, The CP Pro Setting may be a good place to start with the MX400 too??



Fhanks
Mal

[Seeker]

I hope someone else jumps in but I would say it should be a good start if they are both CCPM.

[Kushal_22]

Just on your word Alone I will go and Put the other RX Back in and make sure i get The TX set up in CCPM. Heck I want to do this right. I have Learnt the Hard way that Mickey Mousing things works only for so long and then you PAYYYYYYY through the Nose :mrgreen: :mrgreen:

Regards
MAl