rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 681 ONLINE 20 EVENTS SEARCH REGISTER  START HERE
 
1 page171 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . GrandRC

.
.
e-Electric General Discussion > Electric Guru's need advice on high Volt glitches and rx shutdowns?? RX or CC85HV
 
 
concept1
Key Veteran
Location: Youngstown, OH

ok I need some help on my new E620. the short story is It was flying perfectly on 10s Lipo, then I changed the motor to run 15s A123.
I am running JR pcm radio. on 10s Lipo i had Medusa BEC, when I plugged in the 15s A123 I blew the BEC DIDN'T read the max v was 45!! so I installed my Gaui 3amp regulator and 7.2v rx pack which I pulled from another heli.
I test hovered for about 2 minutes and had some real bad glitching.
I checked my wiring and hovered again, this time glitches were worse so i set down and it started to flutter real bad and tipped over, I noticed the radio was Off, the lights were still on for the regulator but i had no servo control. I turned it off and back on and it was again fine. I spent a few minutes playing with the radio and it worked fine, plugged in the main pack and just let it spool up at 1/4 throttle after about 30-40 sec. it shut down again. this time I unplugged the regulator from the rx and plugged back in and again it all came back on. so now i reversed the motor leads and spooled up the motor in reverse with no problems (only did this though for a few seconds)and all was fine so I reveresed the motor wires back and This is were I should have quit but I tried again. but this time it went to full power and did the chicken dance on the drive destroying most of the heli!

so now I am scared to rebuild and test again in fear of the same results, but my thoughts are most likely when i popped the medusa BEC could this have damaged my RX?? or could it be the CC85 HV causing a problem? I would not think the CC 85 would cause the RX to shut down but not sure?

I will most likely get a DX7 to install since this is a good time to upgrade the radio, but could it be anything else I am missing, but it flew perfect before the 15s A123 swap, the only change was swapping out the motor to a New Scorpion 630kv and plugging in the pack, i did have to add the regulator but no wireing was moved or changed!
thier also was no Ferrite ring on my CC85 but now I added one.
Help~~
09-04-2008 04:39 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

Did you program the CCHV-85?
09-04-2008 05:36 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

I made no changes to the CC85 or the Tx from it's last flight on 10s Lipo the day before.
09-04-2008 06:29 PM
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

you changed motor, added a regulator, increased voltage on packs and have not changed programming on ESC and you also suspect the Rx.

For starters, check Rx directly linked just to servos bypassing all add ons. This will eliminate it from the equation right off the bat.

Secondly, program ESC

If you have a batt (Nic-NiHm)that does not need a regulator, try heli without it first.

<><>...the lunatic is in my head...<><>
09-04-2008 06:46 PM
HOMEPAGE  
 
 
concept1
Key Veteran
Location: Youngstown, OH

the rx "seems" to be fine, I played with it for several minutes and it functions just fine. it is only when I spool up the heli I am having problems!

My first assumption after the first flight was maybe I was overloading the 3amp regulator. but I removed this from a working heli so I am not convinced it's the problem? prior to the chicken dance I was going to try a nicad rx pack, just to rule it out. But since the heli was on the ground at just over 1/4 throttle and no real servo movement, i wasn't thinking this could be it, but i guess as it spools up it could be stressing the Digi servo's to put on some load??

I can pull a rx from another heli and test as well, but is thier any chance it could be a esc problem? again I don't see how the esc would shut down the Rx??
does anyone know just what happens when you exceed the 3amps of a regulator? I find it strange the rx basically shuts down even though power is still connected, my tail servo still buzzes but all other servo's are dead! when i shut it off and back on it coes on!

also my concern is since I blew the Medusa bec, is it possible it damaged my Rx, even though it seems to work fine till you spool it up?

and what changes would need made to the esc, I believe it is auto voltage? I just picked up the castle link and plan to download the latest Sw
09-04-2008 07:04 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

The Auto setting is for lipos only.
09-04-2008 07:14 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

I have used this setting on my hurricane which I flew on both 6s lipo and 8s A123, so I never thought of changing it???
09-04-2008 07:17 PM
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

Quote 
again I don't see how the esc would shut down the Rx??
does anyone know just what happens when you exceed the 3amps of a regulator? I find it strange the rx basically shuts down even though power is still connected, my tail servo still buzzes but all other servo's are dead! when i shut it off and back on it coes on!

Rx in question?

If its PCM, (what I assumed given profile) I dont see how it "turns off" with power other than lock out and/or fail safe.

<><>...the lunatic is in my head...<><>
09-04-2008 07:25 PM
HOMEPAGE  
 
 
concept1
Key Veteran
Location: Youngstown, OH

yep, it's PCM and has never given any problems, if it were a in fail safe It should "come back on" by itself, I don't know what would happen in lock out, I have never seen a PCM have a lock out? but it should go to failsafe settings which would be power off! not full power.

so far no real answeres, I just picked up the parts to rebuild, inlcuding the castle link, I will rebuild update the esc and hope for the best!
I may borrow a dx7 this weekend also.
09-04-2008 07:40 PM
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

Quote 
but it should go to failsafe settings which would be power off! not full power.

yes...depending on programming.

Do chime back with results.

<><>...the lunatic is in my head...<><>
09-04-2008 07:46 PM
HOMEPAGE  
 
 
concept1
Key Veteran
Location: Youngstown, OH

well I got the e620 back together, and did some ground testing with no blades just paddles! I added a ferrite ring to the esc
i upgrades the cc85hv to the latest SW and set t Heli fixed endpoints, set my Tx atv's and ready to spool up.
first spoolup I held onto the main bat Plug and first glitch I quickly unplugged but the radio was still working fine.
I took the Heli out to the grass and spooled up to 1/4 and let it sit, after 30-40 sec it shut down totally, no radio. the regulatod Leds showed full charge and the light on the esc was blinking. i let it sit for over 2 minutes with no change. then turned it off and back on and it all worked. next I removed the regulator and plugged in a nicad 4cell rx pack and spooled up again, after 2 minutes all still worked, then I did it again using the regulator and again it worked. so still at square one. except I know the ferrite ring and new Sw did nothing!

when i can consistantly reproduce the problem, then i will swap the Rx, I may need to put more load on the motor not sure???? any ideas? I don't want it spinning full speed though even with paddles and tail rotor it is still dangerous if it goes nuts!!!!
09-05-2008 07:03 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

concept1
72mhz Don't like a lot of voltage around it. How is your Ant. routed, is it faraway as possible from C/F, metal and other electronics?
09-05-2008 07:18 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

I just got off the phone with CC support, and they assured me it is not likely the CC85, they say it can't give feedback to the Rx. so Now I am much more comfortable with just swapping the Rx. as for wireing on the Rx, I have a revolution antenna mounted on the top of the Nose pointing forward the rx is also on top totaly away from everything. I have another rx in my 500 i will swap out and test, if it works I will probably pick up a DX7
09-05-2008 07:25 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

Well you should be good.
09-05-2008 07:42 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

well I got my DX7 last night and installed, this Am I did a spool up test with no blades and all was smooth. so next will be a test flight and hope it is solved!!!
09-11-2008 01:27 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

Good Luck!
09-11-2008 01:30 PM
 
 
concept1
Key Veteran
Location: Youngstown, OH

Success! did a test hover over lunch and NO problems, it was so smooth I could have layed a penny on the tail case and it probably would have stayed their! not even the smallest glitch. I swapped out my JR pcm for a Dx7, and ditched the regulator for a Rx Pack, also i grounded Everything very well! and wrapped all the wireing in plastic wire wrap.
09-11-2008 06:42 PM
 
 
MrMel
Elite Veteran
Location: Lidingo, Sweden

Congrats!

Yep, 2.4ghz made wonder for us HV heli owners (and many others for that matter)


Team Autopartner - Team pilot
09-11-2008 07:20 PM
 
 
Heli 770
Elite Veteran
Location: Lemon Grove, Ca. USA.

Good to hear that!
09-11-2008 07:21 PM
 
 
1 page171 viewsPOST REPLY
CanoMod . Futaba-RC . A Main Hobbies

.
.
e-Electric General Discussion > Electric Guru's need advice on high Volt glitches and rx shutdowns?? RX or CC85HV
 PRINT TOPIC Advertisers 

Subscribe to This Topic

Sunday, November 23 - 8:26 pm - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie