RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 694 ONLINE 18 EVENTS SEARCH REGISTER  START HERE
 
5 pages [ <<    <     1     ( 2 )     3      4     NEXT    >> ]8532 viewsPOST REPLY
Fast Lad Performance . Ace Hobby . Esprit Model

.
.
Radio - Servo - Gyro - Gov - Batt > 9303-eCCPM-Channel 6 Behind/Lagging - Confirmed
 
 
Chuckie
Key Veteran
Location: Crofton Maryland, MHA member

My Posts This: Topic  Forum

Can you move the servo to channel 3 and change the Rx/Tx to send pitch to channel 3? Have all there servos grouped together so eliminate the encoding problem.

When I first setup my 14mz with the 1024 Rx in my second heli (I don't have two G3 receivers yet) I didn't re-order the servos in the RX. Order was ail, ele, throttle, rudder, gyro, pitch, etc. I noticed the swashplate on the Fury wasn't level as I moved the collective. I then changed the order of the servos for the 1024 Rx to follow the G3 setup. Throttle, rudder, gyro, ail, ele, pitch, etc. Now the swashplate moves straight with the 1024 rx.

I checked the 9z and the channel assignments cannot be changed. Not sure about the 9303.

Chuckie
03-23-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		> Can you move the servo to channel 3 and change the Rx/Tx to send
> pitch to channel 3?

Unfortunately, no, you cannot reassign channels on the 9303.

> What to do next?

There isn't much you can do except get faster servos or use a higher voltage power source, both of which seem to help relieve the issue a bit.

What servos and power source are you using?

- John
03-23-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
lok
Heliman
Location: Bangkok, Thailand

My Posts This: Topic  Forum		>What servos and power source are you using?
I use 9252 on all 3 servo and 4.8 V nicd 1900

> Unfortunately, no, you cannot reassign channels on the 9303
So I have to leave with it?

Will Y harness reverse line do the job?
03-24-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		JKos
Have you contacted JR or Horizon whoever about it? I'm curious what they have to say.. If it's a known bug they're working on, have a remedy for, or have no plans on fixing it in these radios.

I was looking to buy a new radio for my 120° eCCPM machine this next month but been undecided between the 9c and 9303. I've been leaning towards the 9303 but I've also been following this discussion.

I'm assuming ,bug or not, that you're still using your 9303 and I'm wondering if you are still wishing you had your 9c back, prefer the 9303 now, or looking at another radio all together.

.
03-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		Tim,
This issue is really JR's fault. It stems from the simple fact of the delay between channels 2, 3, and 6 which are used for three eCCPM servos. The one rather simple thing JR could do is allow for alternate channel assignments to allow the three channels of concern to be in sequential order.

The 9C is no better. In fact it could even be a bit worse because Futaba uses channels 1, 2, and 6 which causes even more delay.

- John
03-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
TMoore
rrProfessor
Location: Cookeville, TN

My Posts This: Topic  Forum		If y'all want something that rocks for CCPM check out a Stylus. It's available with the Heli card, 50 model memory card, TX, PCM Rx direct from ATX for $690.00. It's got the capability to make CCPM as true as you want and has some of the fastest servos available anywhere.

You can buy 3 of these for one 14MZ.

TM
03-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		Hey guys,
I have a plan to make little video showing exactly what I am talking about with this issue. My plan is to film the swashplate movement when using the following setups:

1) JR 9303 with PCM rx
2) JR 9303 with PCM rx with channels 2 and 6 exchanged
3) JR 9303 with PCM rx with my "channel alignment" circuit
4) JR 9303 with FM rx
5) Futaba 9C with PCM rx
6) Futaba 9C with PCM rx with "channel alignment" circuit
7) Futaba 9C Super with PCM rx
8) Futaba 9C Super with PCM rx with "channel alignment" circuit
9) Futaba 14MZ with G3 PCM rx with same group channels
10) Futaba 14MZ with G3 PCM rx with "old" Futaba channels
11) Futaba 14MZ with R149DP PCM rx with sequential channels
12) Futaba 14MZ with R149DP PCM rx with "old" Futaba channels
13) Airtronics Stylus with PCM rx

This will be done with JR 8231 servos running at a regulated 4.9 V. I can't promise a time frame; at least a few weeks. Case 2 is to show that it follows the channel, not the servo. Case 4 is to show that it is the same with an FM rx as with the PCM rx.

BTW, someone asked if I'm flying my "channel alignment" circuit. No, I will not be doing that. There is a big difference between using it on the bench for tests and trusting a $2500 heli to it. Another issue is that it adds 6-8 ms of latency.

Thanks,
John
03-25-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
blade3d
Elite Veteran
Location: New Jersey USA

My Posts This: Topic  Forum		WOIW guess I'll wait to get a 9303

Blade3d
Rupert
03-26-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Andi G
Veteran
Location: Switzerland

My Posts This: Topic  Forum		Hi,

If you can try a JR 10X as well, many F3C pilots use this one because of the ccpm mixing.

Don't forget that PCM channels might have checksums for groups. As far as I know SPCM uses 8 1024step channels and 2 512 step channels - probably channel 1-4 and 5-8 have their own checksums which would explain the longer delay between those channels compared to PPM.
Seems like Futaba did consider this issue on the 14MZ with the new channel order.

Andi
03-26-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
noahb
Senior Heliman
Location: Carlasbad, NM

My Posts This: Topic  Forum		jkos

What if any information have you found out on this? Have you contacted Horizion?

Thanks
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		*edited*
Made a mistake here, sorry.
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		noahb,
I never contacted Horizon as I don't see a need for it. There is nothing "wrong" with the system. What JR could do is allow for channel reassignments. That would solve the issue.

Tim B,
I don't have video of any of it yet, but I can tell you a few results from as I was going along looking at different things.

1) JR 9303 with PCM rx

Issue as described and discussed in this thread.

3) JR 9303 with PCM rx with my "channel alignment" circuit

Level movement

4) JR 9303 with FM rx

Same as 1).

9) Futaba 14MZ with G3 PCM rx with same group channels

Level swash movement

10) Futaba 14MZ with G3 PCM rx with "old" Futaba channels

Not good.

11) Futaba 14MZ with R149DP PCM rx with sequential channels

Not bad at all. Can't really tell any problems.

12) Futaba 14MZ with R149DP PCM rx with "old" Futaba channels

Not good. Similar to 1) if not just a touch worse as there is a bit more delay between ch 2 and 6 [since Futaba uses channels 1, 2, and 6 for the swash].

13) Airtronics Stylus with PCM rx

Level swash movement.

- John
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
noahb
Senior Heliman
Location: Carlasbad, NM

My Posts This: Topic  Forum		ccpm

So if I read this correct, when you move the collective stick up and down, ch 6 lags?

As far as ch. assignments, could one mix ch 6 to an aux. ch and leave on all the time. Then plug ch. 6 servo into aux?

Would you think this would be noticable in a small electric heli?
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		Wow! Did not expect all of that. My post asking that question couldn't have been up more than a minute or two and you already typed all that while I was deleting my post. I edited my post because I realized I missed some posts somehow. I knew you were conducting tests, but I didn't know you we're making a video.

Thanks for sharing that info.

I'm interested in this channel alignment curcuit. If you've mentioned it before this then I must have missed that also. I'll look through the thread to see just what all I've missed.

I've always been leaned toward the 9303, but from following this thread for some time, it's got me looking at the stylus. Looking forward to the rest of your data.

Thanks for doing all of this for us. It's great.
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		Tim,
I may have bit off more than I can chew by saying I would make a video. The only purpose for making a video would be to prove that the issue I raised is real to those who don't believe it.

Keep in mind that the "issue" is much reduced by using faster servos and a stable power source.

If you don't mind the interface on the Stylus, it is a very powerful radio. All I can say is that it has been a "hidden giant" for many years now.

- John
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		So after playing with all the newer radios, is the stylus still your favorite?
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

My Posts This: Topic  Forum		> So after playing with all the newer radios, is the stylus still your
> favorite?

Yes. Now, I should caveat that with the fact that I have not had a chance to fly with it yet but I sure don't foresee any problems. It has some incredible features, some of which not even the 14MZ has. Tremendous bang for the buck!

I don't know why it took me this long to "find" the Stylus. Had I really looked into it, it probably would have been my first and only computer radio.

- John
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		I have a question about the stylus and your testing. As far as I know the stylus doesn't have channel assignment either, right? If right, then it has the same channel assignment as JR, right?. So why do you think it keeps a level swash while the others don't?
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
TMoore
rrProfessor
Location: Cookeville, TN

My Posts This: Topic  Forum
Quote 
I have a question about the stylus and your testing. As far as I know the stylus doesn't have channel assignment either, right? If right, then it has the same channel assignment as JR, right?. So why do you think it keeps a level swash while the others don't?


There is no think about it, it does keep the swashplate level. The Stylus doesn't use the same channel assignments as JR so it doesn't work under the same constraints. The fact is the radio hauls a** from a processor standpoint and it works.

Not bad for a radio that came out in 1995.

TM
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
Tim B
Senior Heliman
Location: Pasco, Washington

My Posts This: Topic  Forum		Well I thought it had the same channel assignment as JR from looking in the manual.

As far as it's age, I wish they had updated it at least once to a nicer interface. And given that fact that the radio itself hasn't been updated in 10 years makes hesitant to buy it, because I just know with my luck, as soon as I do buy it, they'll come out with an updated version the next day.
04-07-2005 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
5 pages [ <<    <     1     ( 2 )     3      4     NEXT    >> ]8532 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . Futaba-RC

.
.
Radio - Servo - Gyro - Gov - Batt > 9303-eCCPM-Channel 6 Behind/Lagging - Confirmed
 Print TOPIC Advertisers 

Subscribe to This Topic

Sunday, November 22 - 7:48 pm - Copyright © 2000 - 2009 runryder.com | email | link to rr | START HERE | NF