stylus/758 glitches

[pepper]

ok guys. i have only put the servos in the heli, went to the swash set, and set it at something with a 4 in it. not really sure what i did yet?? anyway here is the problem. when i move the collective up and down fast my servos start going nuts for about a second. i am using a 1400mah duralite pack with a 5.1reg and it has load tested just fine. so i have taken the battery out of the problem.

is their a basic setup that you guys use.?? i am using a 3 servo ccpm swash setup. i need help. i have a bad habit of just pushing buttons and i am afraid that i will really mess something up. and no, i don't read the manual until i have really messed it up, i have been use to JR radios and the stylus manual plus the heli card manual sounds like Arabic to me..

thanks,
pepper
GOD BLESS

[Clintstone]

Let me know what you come up with Pep...............I am wanting to see one of the radios so if you have it at Sulfer I want to see it. Panos flew one for a while and he could maybe help.

[pepper]

FOUND THE PROBLEM,,,, but still another one pulled up.. when i take my rocker switch totally out and plug the batt straight into the rx everything works perfect. but as soon as i install the switch, it starts glitching???? also i have used 3 different switches and a couple different batteries, so that is not the problem..

ya guys got any info, i know that it sounds stupid but i am telling ya, this thing just doesn't like switches!!

pepper
GOD BLESS

[Clintstone]

Hope you find it and I would like to know.

[I3DM]

Hey pepper - what servos are you running ? a friend of mine had this happen with a PCM Rx when he was running Futaba digitals, and was advised by Airtronics that there might be a problem using Futaba digitals with the fast PCM capabilities of the Stylus...

so what servos ?

BTW my friend put an FM Rx and all was back to normal, he flys the PCM today, but with Airtroncics servos.

[pepper]

they are the 94758 so it's not that and i plan on getting rid of the radio and sticking with my JR!!

pepper

[TMoore]

Pepper,

Is this glitching that you are talking about on a Stylus?

Terry

[pepper]

the glitching is done by the servos. no matter what i do to the stylus, as long as their is a on/off switch hooked up, it glitches!!

pepper

[TMoore]

Help me out here because I don't know about all the things that you have done. Does a standard ATX switch harness with a 4 or 5 cell pack glitch? Have you taken the gyro out of the equation? Have you measured the noise of the regulator on the Duralites? Yes, regulators can cause glitch problems if they are noisey. I have witnessed this myself.

Terry

[pepper]

to shorten the problem is that when i move the collective up and down fast it glitches, if i move it slowley it doesn't. by acident pluged the battery straight into the rx and their was no glitching when the collective was moved fast. i have tried 3 different switches, 3 different and 3 different batteries and still the same problem, when a switch was hooked up it would glitch in fast movement of the collective..

pepper

[TMoore]

Are we talking the same regulator on each battery?

On the surface it sounds like when you move all three digitals at the same time what you are seeing are momentary voltage losses. This will definitely cause the problem you are seeing. When you take the switch out of the loop you are essentially getting a little more amperage due to switch losses. To be sure, use a DVM on the battery with the switch in the line. Move the servos and monitor the voltage drops. Then do the same test without the switch. The best results with ATX stuff is on unregulated 6 volt packs. I use this combination with CSM gyros and it works great.

I have a feeling if there isn't a RX problem this is voltage related. 1400 doesn't sound like enough amperage for 3 power hungry 758's. BTW, I haven't seen a single Battery checker that can simulate the loading of digitals under duress.

Terry

[pepper]

it is the same regulator on the duralites but i also use a 2700 mah 4cell nimh and a 4cell sub C 1800 JR pack and got the same results with all.
i understand what you are saying, yes, it does seem like a battery voltage drop, but everything was checked.

pepper

[TMoore]

'but everything was checked.'

Checked how? 4 cells won't get it done. You verified that part of the problem was voltage related when you removed the switch and wired the power source directly to the receiver. Just load testing the battery isn't enough. ATX servos, like the 758's, come with a price. They suck the life out of a battery like Dracula taking a bite out of your neck. If you want the performance, you got to feed them. Try a 5 cell pack and see what happens.

Terry

[pepper]

i ran the servos on a JR system and it worked fine. all packs were fully charged and i forgot to mention that i just a 6v reg on the duralite with the stylus and it had the same problem..

[TMoore]

Send the RX back to ATX for evaluation or try another one. If you have a JR FM receiver you can run it with the ATX TX and try that.

Terry

[pepper]

I have 3 ATX rx's and tried them all. same thing.. i talked to Buzz from Mag. fuels. he has flown airtronics for a long time. me and him were on the phone for about an hour and he came to the conclusion of being the TX. i just haven't had the time to send it back yet and hate to send stuff back.
:arggg: :arggg: :arggg:
pepper

[DavidH]

by acident pluged the battery straight into the rx and their was no glitching when the collective was moved fast. i have tried 3 different switches, 3 different and 3 different batteries and still the same problem, when a switch was hooked up it would glitch in fast movement of the collective..


The above scenario would not make me think it was the transmitter that was causing the problem. The transmitter has no idea how the battery is connected to the receiver.

David

[pepper]

right, but i still can't explain why in the world 3 different switches were replaced and 3 batteries with different voltage and 3 rx's of the same brand.

simple fact is that when a switch was hooked up it glitched, and battery straight into the rx no problem. :bomb: :badair:

[TMoore]

Regarding the TX, the only thing that you can do is to recalibrate it. This is what ATX will do once they get the TX back. Just to eliminate that variable, it is what I would do if I had it on the bench. The recalibration procedure is straightforward to do but I don't think it is the problem.

How old is this TX? There was a period where the initial run of TX's needed to be recalibrated due to the new heli cards that were in use at that time.

Were the 3 RX's PCM or PPM/FM? What sort of switches did you try? Do you have a JR FM RX on the same channel as your Stylus? If you can find one, try it and see if it will recreate the problem.

If all else fails, call Jack Albrecht at the ATX tech support line.

Terry

[rchelitek]

Pepper,

What regulator do you have is it the duralite with switch or without. It definately sounds like you were browning out the rx. When you said that you took the switch out of the equation was that with the regulator and duralite battery or was that a freshly charged 4 cell. Also if you have the regulator with out the switch did you go battery, switch, regulator, then rx for the order or was it battery regulator switch, then rx. If its like the second order I have found that the switch has enough resistance that if you try to instantaneously pull 5 amps the voltage can 1.2 volts or more for less than a second. Just long enough for the microcontroller to go sleep for a moment. Its been my practise that if there is no switch on the regulator then i just use a Mini-deans connector on the battery and regulator and just disconnect them. Also if it does have a switch on the regulator i replace the switch with a deans connector and then make a loop out of the male connector to complete the circuit. Basically the loop has a tag that says remove before flight.