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26 Nov 2012 01:37 #3194 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
No luck ... Still no throttle. I switch back to the spektrum tx and throttle is ok. Just can't get it going on deviation. Hexperience ... Have u had any luck on yours? I am using the experimental telemetry build update 2.

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29 Nov 2012 14:13 #3411 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
Just updated to 2.0. Still can not get throttle on the ultra micro t-28. Anyone out there with the same problem or success on the ar-6400 brick

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29 Nov 2012 14:23 #3413 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
What number of channels do you set for DSM2 protocol?

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29 Nov 2012 15:19 - 29 Nov 2012 15:23 #3420 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
Set to 4 ch. Throttle is on ch 1. All 3 control surfaces are responding. I even tried putting battery in plane with throttle at 100% then bring back to 0 to calibrate esc. Problem is that the micro does not beep like a larger esc would to learn throttle so I don't think that is working. Bind back to 4 ch spektrum tx and all is well.
Last edit: 29 Nov 2012 15:23 by NotFastEnuf.

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29 Nov 2012 15:45 - 29 Nov 2012 16:05 #3422 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
Can you try bind at 6 channel mode?

Also, you can try gradually move throttle trim to low side, then connect flight battery. Check at channels monitor the throttle channel, low and high values (-100% - +100%).
Last edit: 29 Nov 2012 16:05 by vlad_vy.

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29 Nov 2012 17:14 - 29 Nov 2012 17:15 #3425 by marc
Replied by marc on topic DSM2 Reports
@NotFastEnuf

I have an eflite UM 4-site, the RX is AR6400L.
Model is binding and functioning.

DSM2, 7 channels, see attached ini-File!
Attachments:
Last edit: 29 Nov 2012 17:15 by marc. Reason: upload att.

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29 Nov 2012 18:00 #3429 by Hexperience
Replied by Hexperience on topic DSM2 Reports
Spektrum call it a 6 or 4 channel rx so it makes sense that you have to bind it at 6 or more channels. I know on my um 4-site I put it in to a mode where the ailerons where on separate channels so channel 5 became active.
There are 10 types of people in this world. Those that understand binary and those that don't.

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29 Nov 2012 19:11 #3432 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
As always..... All very good info. This site is the best!! Thanks everyone. I will try everything suggested tonight and report back!

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30 Nov 2012 01:33 #3440 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
UPDATE: 6 ch DSM2 worked! Throttle is operational. It never occurred to me that this is a 6 ch Rx since the plane only uses 4. Thanks everyone. Time to pick out a new micro now!!!

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30 Nov 2012 05:05 - 30 Nov 2012 05:56 #3442 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
It seems that 4/5 channel mode has problem with order of channels at DSM2 frame. Or 4/5 channel transmitters have at reality at least 6 channels, but only use 4 or 5 of them.
Last edit: 30 Nov 2012 05:56 by vlad_vy.

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30 Nov 2012 10:59 #3450 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
I have two of the micro Orange Rx 4 ch units and they work perfect in 4 ch mode though.

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30 Nov 2012 13:50 - 30 Nov 2012 15:18 #3452 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
I checked it with my Ultra Micro. With any channels order in the DSM2 frame, throttle working only at 6 channel mode. At 4 or 5 channel mode all 3 control surfaces are responding, but throttle not responding.

It is possible that 4, 5 and 6 channel Tx always send DSM2 frame with all 7 channels, but unused channels have fixed values (=0). For example, DX6i always send 7 channel with fixed value 0x1800 (channel 6 (0-6) and fixed channel value = 0 (-150%)).
Last edit: 30 Nov 2012 15:18 by vlad_vy.

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30 Nov 2012 15:14 - 30 Nov 2012 15:26 #3453 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
With E-flite Blade mSR all are the same. Throttle responding only at 6 channel mode. But RTF version included 4 ch Tx (MLP4DSM).
Last edit: 30 Nov 2012 15:26 by vlad_vy.

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30 Nov 2012 16:43 #3455 by Hexperience
Replied by Hexperience on topic DSM2 Reports
Yep, I built my own dsm module for the 9x from a tx out of a Dx4e. It's at least 6 channels and dsmx. The RTF ones are the same, but a little less power from what I understand.
There are 10 types of people in this world. Those that understand binary and those that don't.

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30 Nov 2012 17:16 #3457 by PhracturedBlue
Replied by PhracturedBlue on topic DSM2 Reports

vlad_vy wrote: It is possible that 4, 5 and 6 channel Tx always send DSM2 frame with all 7 channels, but unused channels have fixed values (=0). For example, DX6i always send 7 channel with fixed value 0x1800 (channel 6 (0-6) and fixed channel value = 0 (-150%)).

As I've said before, DSM2 is a difficult protocol to implement fully because Spektrum seems to have kept 'upgrading' it while maintaining backwards compatibility, leading to lots of corner cases. Some Rx understand all variants of the protocol, whereas others have specific expectations. Since I have access to one DSM2 Tx and 3 DSM2 Rx, I cannot test (or even detect) all of the weird corner cases. So it will likely continue to be a trial-and-error approach to find how to make specific models work.

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30 Nov 2012 17:45 #3458 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
I think will be better at present time limit DSM2 protocol to 6, 7, 8 and 9 channel mode. It will narrow area of problems to users.

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30 Nov 2012 19:27 - 30 Nov 2012 19:41 #3465 by NotFastEnuf
Replied by NotFastEnuf on topic DSM2 Reports
Well the Orange Rx micro receiver is true 4 ch and works perfect in 4 ch mode. So I would not want to see 4ch go away. The ar6400 is a true 6 ch Rx so it makes sense that it needs to be in 6ch mode even if most micros only use 4 channels. I think Dsm2 is a great success so far!!!!
Last edit: 30 Nov 2012 19:41 by NotFastEnuf.

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01 Dec 2012 04:19 #3481 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
I think Orange Rx micro receiver (true 4 ch) will works perfectly in 6 or 7 ch mode.

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01 Dec 2012 14:28 #3497 by coaster
Replied by coaster on topic DSM2 Reports
Hi all
just upgraded to 2.0 and restored my 1.2 Models, now i have issues with my Blade Mcpx, the ressponse to AIL, ELE, and THR are like i have reduced
the servo scales by 30%, reverted to 1.2 and everything is fine.

Any ideas ?

cheers
Graziano

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01 Dec 2012 14:46 - 01 Dec 2012 14:58 #3500 by vlad_vy
Replied by vlad_vy on topic DSM2 Reports
At version 2.00 corrected error at DSM2 channels normalization, version 1.1.2 has scale=100% but really 150%. For old DSM2 models you need increase all rates now to 1.5 times.
Last edit: 01 Dec 2012 14:58 by vlad_vy.

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