RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 829 views
Scorpion Power Scorpion Power
HelicopterRadio - Servo - Gyro - Gov - Batt › JR 9303 and Throttle Hold glitch
03-08-2006 07:49 PM  11 years agoPost 1
lineofsight

rrApprentice

St. Louis, MO - USA

My Posts: All  Forum  Topic

I did a search and couldn't find any mention of this problem.

This just recently came up, in the last couple of weeks.

I was setting up a pair of T-Rex's, one has a PPM receiver (Polk Seeker), the other a PCM receiver (JR 700). I thought it might just be an e-heli thing until the same thing happened on my Sceadu Evo 50 (PPM receiver).

When I connect the battery with Throttle Hold on, all the servos glitch, the whole swash jumps up and down. Also, the motor starts and stops; I don't think I've seen the rudder channel glitching, but not sure. If I step away with the transmitter, it usually stops, but sometimes keeps going till I move the heli on the ground or change some other orientation.

I never noticed a problem in flight, and I recently realized that by flipping off throttle hold, so in Normal mode or either Idle Up modes, there is no problem, the swash jumps into place and stays there with no glitching. Flipping the throttle hold on again and the servos all start jumping.

Any ideas, or does this radio just need to go into Horizon?

Thanks,
Chris

PM  EMAIL  Attn:RR  Quote
03-08-2006 08:18 PM  11 years agoPost 2
robhurlin

rrKey Veteran

Pretoria, South​Africa

My Posts: All  Forum  Topic

Yo Chris, you got me so interested I went and checked it immediately on my 9XII (same as 9303) with 900S receiver on my R50SE. Not a glitch in sight!! I turned the heli on with throttle hold switch set and all that happened was that it powered up exactly as if the throttle hold was off. I tried various ideas but cannot repeat your symptons at all. The system is rock solid whether the throttle hold is on or off. Your throttle hold switch is probably faulty and makes a partial connection causing glitching - time for the repair shop!!

Let us know what you found .

Rob.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-08-2006 09:15 PM  11 years agoPost 3
lineofsight

rrApprentice

St. Louis, MO - USA

My Posts: All  Forum  Topic

Yeah, I kind of figured it was a defect of some sort. As I mentioned, this just recently started, in the last month, and two of the three helicopters I've seen this on were working fine for a few months prior to that. Just trying to figure out if anyone's ever experienced this issue and has an idea how much it's going to cost or what it's going to involve. The switch action is normal, and when it's not glitching, it works like normal. BTW, this is not just with turning on the system in TH, the glitches occur any time I flip into hold, even after a flight that went smoothly. Makes me nervous to think that I actually did some autos today, didn't have a problem, but I didn't think about what could have happened.

Thanks for your thoughts.

PM  EMAIL  Attn:RR  Quote
03-09-2006 07:34 AM  11 years agoPost 4
robhurlin

rrKey Veteran

Pretoria, South​Africa

My Posts: All  Forum  Topic

They will probably start with replacing the switch, which is not very expensive. If that's all it is, it should be quick & easy. If the motherboard has a fault then more $$ and a little more time. I have never heard of a problem like this before but I reckon it is probably the switch or associated wiring.
Let us know!

Rob.

PM  EMAIL  GALLERY  Attn:RR  Quote
07-16-2006 02:50 AM  11 years agoPost 5
lakespinner2

rrVeteran

north carolina

My Posts: All  Forum  Topic

I just went thru a similar situation where my 9303 would often glitch during the middle of an auto. The heli would be half way to the ground and the swash would start jumping and the throttle would pulse for a split second. A couple of times the heli sped back up after landing the auto, while still in throttle hold. I thought it was going to rev up and take off again once while still in throttle hold but it only lasted for a second or two and then throttled back down, and the swash was jumping aound at the same time.

After experiencing this using multiple tx modules on the 9303, and seeing it happen on multiple helis with differnt JR receivers, I finally had to conclude it was the transmitter itself.

I sent it to horizon service and told them it was an intermittent problem. Naturally, it would not fail while they were testing it but they did replace the Throttle Hold switch before sending it back to me. I just got it back a couple of days ago. I took out the beater raptor 50 and did some autos with the 'repaired' transmitter. It seems to be rock solid now with the new switch. I'll keep an eye on it but so far so good.

When it was doing it badly in the past, it would glitch on the table when in throttle hold mode. I'm pretty sure what it was doing was jumping out of throttle hold for a split second even with the TH switch engaged. After an auto, the throttle/pitch was usually very high and if it glitched then the throttle was nearly wide open, hence the exciting pulse of power. The trims are slightly different in the various modes so aileron and elevator would move only slightly during the glitch but the pitch and throttle would move a LOT.

I think I'm all set now with the new switch but I wanted to post this in case others are seeing the same wierdness while in throttle hold mode.

PM  EMAIL  GALLERY  Attn:RR  Quote
07-16-2006 04:56 AM  11 years agoPost 6
perfesser zero

rrKey Veteran

Dublin, VA., USA

My Posts: All  Forum  Topic

lineofsight...

PCM receiver (JR 700).
Just an aside here, but an R700 Rx is a PPM Rx. The R770S is the PCM Rx. Just though I'd bring that up if you where confused on that.

Later...

Scott!

Tiger 50 - OS 50SX-H
Hawk Sport - OS 37SZ-H
Raptor 30 - OS 37SZ-H
JR 10X/R950S

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 829 views
Scorpion Power Scorpion Power
HelicopterRadio - Servo - Gyro - Gov - Batt › JR 9303 and Throttle Hold glitch
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, November 21 - 2:56 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online