RCCrawler Forums

xjcritter · 12-13-2011, 04:44 PM

Ieght guys here my lil problem. Im not looking for people to solve it over the web just point me in the almost right direction please. When I turn left and only left and go full throttle of even sometimes just bump the throttle my servo glitches out and rips right.....My specs are as follows

FXR on 3s
CC BEC set to 7.1 or 2..can remember, Straight to servo
Hobbyking HK125298B
Traxxas HO 2.4 Tx an Rx...snipped about 1/4in off the Rx ant. was told it shouldn't hurt anything but the range

The specs of the servo...HobbyKing R/C Hobby Store : HK15298B High Voltage Coreless Digital MG/BB Servo 66g / 20kg / 0.16s

Could it be the servo demanding to much power, or just a SH***Y servo in general. Im kinda lost on this one so any help may work

jeepster73 · 12-13-2011, 04:48 PM

It's most likely that HK servo.

Meatwad · 12-13-2011, 04:49 PM

Is the bec grounded to the rx as well as the batt?

xjcritter · 12-13-2011, 04:51 PM

Quote:

Originally Posted by Meatwad

Is the bec grounded to the rx as well as the batt?

nope the only thing going to the Rx is the signal wire the rest is wire from batt. plug to the servo.

xjcritter · 12-13-2011, 04:52 PM

Quote:

Originally Posted by jeepster73

It's most likely that HK servo.

hope not this is its first outing

but it maybe true thought I havent wired another up to test the theory

VMGontheRocks · 12-13-2011, 05:11 PM

Quote:

Originally Posted by xjcritter

nope the only thing going to the Rx is the signal wire the rest is wire from batt. plug to the servo.

Ground it to the Rx and see if that works.

xjcritter · 12-13-2011, 05:13 PM

Quote:

Originally Posted by VMGontheRocks

Ground it to the Rx and see if that works.

To the batt and Rx or just the Rx?

fred0000 · 12-13-2011, 05:16 PM

Quote:

Originally Posted by VMGontheRocks

Ground it to the Rx and see if that works.

X2, almost everyone having steering issues with direct BEC to servo wiring have issues. run the signal and ground to the RX and report back.

(for the record, I have 3 of those servos in various RC's and love them

)

xjcritter · 12-13-2011, 05:19 PM

cool deal Ill get on it now..maybe after dinner

xjcritter · 12-13-2011, 05:27 PM

Quote:

Originally Posted by fred0000

X2, almost everyone having steering issues with direct BEC to servo wiring have issues. run the signal and ground to the RX and report back.

(for the record, I have 3 of those servos in various RC's and love them

)

That was the issue...hacked in a wire plugged it up and bamm flawless

Thanks guys for the quick responses and yeah fred I love this servo. it snapped my BTA spacer clean off the knuckle arm and wanted more

Charlie-III · 12-13-2011, 07:43 PM

Usually when there is a steering issue the "fixes" are:

1-external BEC
2-run the black or brown wire from the servo to the RX (mostly Spektrum radios)
3-check the steering EPA's to make sure you are not over driving the servo to mechanical limits

In no particular order.

xjcritter · 12-14-2011, 11:31 AM

For future search reference my issue was a glitchy servo with the EPAs set up right and direct wire from the back of the battery plug in to the power side of the BEC and the servo sides power wire(black and red ones off the BEC) directly to the servo and the signal(yellow or off color wire) to the Rx

My fix was to unhook the battery side negative(Black) wire and plug it into the same port for your servos negative port on the Rx. Use your ESC plug in to determine what the signal and negative ports are for your servo.

fred0000 · 12-14-2011, 02:56 PM

Quote:

Originally Posted by xjcritter

My fix was to unhook the battery side negative(Black) wire and plug it into the same port for your servos negative port on the Rx. Use your ESC plug in to determine what the signal and negative ports are for your servo.

whoa, so reading it the way you've written it here you only have the red wire from the BEC out hooked up to the servo? if so this is wrong. you will want the ground hooked up to the servo AND the RX.

xjcritter · 12-14-2011, 04:36 PM

on the BEC out side I have both hooked up..I took the negative off the battery deans and hooked it into the servo...Its glitch free and just as powerful..is that wrong

fred0000 · 12-14-2011, 04:57 PM

like this

xjcritter · 12-14-2011, 05:18 PM

yep mines wrong...Thanks for correcting that one

fred0000 · 12-14-2011, 06:16 PM

Quote:

Originally Posted by xjcritter

yep mines wrong...Thanks for correcting that one

those lame MSPaint box diagrams always help, I should have just done one from the start.

atleast you didn't break anything, thats always a plus.

xjcritter · 12-14-2011, 06:18 PM

Very true and I kinda like the dumbed down versions...makes me feel smart when I understand them

...Thanks a lot for all your help.

12-13-2011, 04:44 PM	#1
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	Uhhh do huh??? Ieght guys here my lil problem. Im not looking for people to solve it over the web just point me in the almost right direction please. When I turn left and only left and go full throttle of even sometimes just bump the throttle my servo glitches out and rips right.....My specs are as follows FXR on 3s CC BEC set to 7.1 or 2..can remember, Straight to servo Hobbyking HK125298B Traxxas HO 2.4 Tx an Rx...snipped about 1/4in off the Rx ant. was told it shouldn't hurt anything but the range The specs of the servo...HobbyKing R/C Hobby Store : HK15298B High Voltage Coreless Digital MG/BB Servo 66g / 20kg / 0.16s Could it be the servo demanding to much power, or just a SH***Y servo in general. Im kinda lost on this one so any help may work

12-14-2011, 04:36 PM	#14
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	Re: Uhhh do huh??? on the BEC out side I have both hooked up..I took the negative off the battery deans and hooked it into the servo...Its glitch free and just as powerful..is that wrong

12-14-2011, 04:57 PM	#15
fred0000 cherry bomb Join Date: Jul 2006 Location: Nanaimo, BC, Canada Posts: 1,598	Re: Uhhh do huh??? like this

12-14-2011, 05:18 PM	#16
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	Re: Uhhh do huh??? yep mines wrong...Thanks for correcting that one

12-14-2011, 06:18 PM	#18
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	Re: Uhhh do huh??? Very true and I kinda like the dumbed down versions...makes me feel smart when I understand them...Thanks a lot for all your help.

12-13-2011, 04:48 PM	#2
jeepster73 Rock Crawler Join Date: Mar 2006 Location: Up North Posts: 617	It's most likely that HK servo.

12-13-2011, 04:49 PM	#3
Meatwad I wanna be Dave Join Date: Jul 2009 Location: Rancho Relaxo. California. USA. Earth. Posts: 3,292	Is the bec grounded to the rx as well as the batt?

12-13-2011, 05:19 PM	#9
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	cool deal Ill get on it now..maybe after dinner

12-13-2011, 07:43 PM	#11
Charlie-III I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA Posts: 8,314	Usually when there is a steering issue the "fixes" are: 1-external BEC 2-run the black or brown wire from the servo to the RX (mostly Spektrum radios) 3-check the steering EPA's to make sure you are not over driving the servo to mechanical limits In no particular order.

12-14-2011, 11:31 AM	#12
xjcritter Quarry Creeper Join Date: Dec 2010 Location: gastonia Posts: 295	For future search reference my issue was a glitchy servo with the EPAs set up right and direct wire from the back of the battery plug in to the power side of the BEC and the servo sides power wire(black and red ones off the BEC) directly to the servo and the signal(yellow or off color wire) to the Rx My fix was to unhook the battery side negative(Black) wire and plug it into the same port for your servos negative port on the Rx. Use your ESC plug in to determine what the signal and negative ports are for your servo.

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