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MTA Hobbies . Model Rectifier Corp . PowerHelis

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Avant Aurora - EFX - FX > Anyone using a stylus with a freya ccpm or avant?
 
 
bparro
Veteran
Location: indianapolis,in

I have an avant that I just finished and I have a problem with the servos on ccpm. When I pump the collective up and down as fast as possible the swash starts to look like it is getting "hung up" or it dances around. The servos are 9252's. All is fine when I pump collective at a medium speed. I also found that when I charge the battery it is gone but comes back pretty quickly. The battery is a 3000 mah nicad. I suspect that it is the same problem I3DM had with his stylus. You guys that are using this radio with the 92186Z RX with CCPM, what batteries/regulator do you use? thanks
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

A 4 cell pack won't cut it, get something else.

TM
05-19-2006 Over year old.
 
 
bparro
Veteran
Location: indianapolis,in

Really? What do you suggest Tmoore? I really dont want this thing cutting off in flight
05-19-2006 Over year old.
 
 
WreckRman2
Key Veteran
Location: Indianapolis, IN

Quote 
A 4 cell pack won't cut it, get something else.


Gotta love the "that won't work clause" with no explantion to back it up.

________________
David Smith
317.777.3230
Trex 600n Pro, OS50 Hyper, Align Pipe, GY611, GV1
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Quote 
Gotta love the "that won't work clause" with no explantion to back it up.



This issue has been discussed a lot and since Lior's postings were brought up I didn't feel the need to go into a lengthy dissertation as I felt like the foundation had already been laid. Duralite, Fromeco and probably another dozen other producers of Li-on/regulator combinations have a good handle on this problem. A 4 cell pack won't cut it with all digitals/gyro combination -BECAUSE- of the battery failsafe issue with ATX RX's. The B-Safe threshold is set a little high on the PCM RX's and it won't tolerate any dipping below that threshold. The servos are driven in pairs so there is a healthy current draw on a CCPM machine.

As far as speed matching of the servos, the Stylus is quite capable of making the swash go straight up and down but I have no idea what has been done with the CP-S Delay to match the servo speed.

I'm not sure that what I use for power will please everyone that's reading the mail on this forum anyway but I do know from experience that 4 cells won't do the job.

TM
05-19-2006 Over year old.
 
 
WreckRman2
Key Veteran
Location: Indianapolis, IN

Quote 
A 4 cell pack won't cut it with all digitals/gyro combination -BECAUSE- of the battery failsafe issue with ATX RX's


What is an ATX RX?

________________
David Smith
317.777.3230
Trex 600n Pro, OS50 Hyper, Align Pipe, GY611, GV1
05-19-2006 Over year old.
 
 
bparro
Veteran
Location: indianapolis,in

Yes, I have already decided to use an arizona regulator with a deans connector and probably their battery too. The servos running in pairs is interesting because when I unplug one of the servos it can go as fast as I can without trouble. I did read Lior's post but it looks like he switched to futaba so I was looking for people who still use this setup without problems. Thanks for your reply TMoore
05-19-2006 Over year old.
 
 
bparro
Veteran
Location: indianapolis,in

ATX = airtronics
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Airtronics Receiver

When you switch from 4 cell packs to regulated 5 cells or regulated Li-on you will notice a nice increase in speed. Before we switched to piezo's that won't tolerate 6 volts I never used 4 cell packs.

TM
05-19-2006 Over year old.
 
 
WreckRman2
Key Veteran
Location: Indianapolis, IN

So this is an Airtronics problem and not a battery problem.

________________
David Smith
317.777.3230
Trex 600n Pro, OS50 Hyper, Align Pipe, GY611, GV1
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Quote 
So this is an Airtronics problem and not a battery problem.


Not an ATX problem, a power supply problem. The introduction of power hungry digital servos and CCPM has forced battery makers to come up with new solutions.

The new Futaba RX's are power hungry too.

TM
05-19-2006 Over year old.
 
 
THX1138
Elite Veteran
Location: Plainfield, IN

Them be a lot of long words, for we be nothin' but humble pirates here.
I never thought about the battery Fail-safe when I was over there the other day. It nakes sense though. Talk to ya laeter.

Lou

Back off man, I'm a scientist.
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Haarrrrrr!
05-19-2006 Over year old.
 
 
WreckRman2
Key Veteran
Location: Indianapolis, IN

Quote 
Not an ATX problem, a power supply problem.



So what you are saying is if one were to use a different RX then the 4.8v nicad battery would work fine... this makes it an ATX RX problem and not a battery problem.

________________
David Smith
317.777.3230
Trex 600n Pro, OS50 Hyper, Align Pipe, GY611, GV1
05-19-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Quote 
So what you are saying is if one were to use a different RX then the 4.8v nicad battery would work fine... this makes it an ATX RX problem and not a battery problem.


If you want the performance and the system response speed of the Stylus you have to power it properly. It's no more a problem than having to run premium gas in certain vehicles versus running regular gas. Digital servos use more current than analog servos typically do, not always but in most cases. Look at some of JKos' posts on the subject and he can tell you that if you want the system speed of the ATX you will have to power it. The Stylus was designed way before digital servos were in vogue. I simply don't see how you can parse what I'm saying as to read that the ATX RX has a problem. If you want to pick nits, the fact is that all the current systems were originally designed to run on 6 volts (4 dry cells) not 4 nicads and this includes the ATX stuff. It's only been in the last few years that some manufacturers were designing their equipment to run on 4.8 volts only.

TM
05-19-2006 Over year old.
 
 
THX1138
Elite Veteran
Location: Plainfield, IN

It is the Fail-safe programing that is specific to ATX.

Lou

Back off man, I'm a scientist.
05-19-2006 Over year old.
 
 
I3DM
rrProfessor
Location: Israel

Definitely the same problem i had with mine.

The advie Tmoore is giving you is correct.

Team pilot for Radix, Helidirect, Logictech, ThunderPower, Fromeco, Gaui
www.liorzahavi.com
05-31-2006 Over year old.
HOMEPAGE  
 
 
bparro
Veteran
Location: indianapolis,in

I did try it with a duralite 4000 and 5.1 regulator and the problem was gone
05-31-2006 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

I'm tickled that you got it worked out.

TM
05-31-2006 Over year old.
 
 
WreckRman2
Key Veteran
Location: Indianapolis, IN

Now he has to fly it.

________________
David Smith
317.777.3230
Trex 600n Pro, OS50 Hyper, Align Pipe, GY611, GV1
05-31-2006 Over year old.
 
 
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Avant Aurora - EFX - FX > Anyone using a stylus with a freya ccpm or avant?
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