NTC3 - Hitec 625 servo (steering) affects throttle servo

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igorkv

RCNT Racer
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94
RC Driving Style
Hi guys. I just got my Hitec 625MG steering servo (slightly used, fro eBay) and connected to the receiver, which comes with NTC3 RTR.
Now when I turn steering servo the throttle servo moves (shifting) too.

What can be wrong?

Thanks in advance,
Igor
 

jon2

Nitro ASSpired!!!
Supporter
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12,186
Location
Oxnard
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Bashing
lamens terms:


pull out both steering and throttle servos on your reciever. Then switch them. Then try again. Torque was correct in his post just not direct enough
 

igorkv

RCNT Racer
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94
RC Driving Style
No they are on correct channels.
The servo look like very sensitive. When I touch it gitters.
 

Digital Liquid

RCNT Addict
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902
Location
Wilmington, NC
RC Driving Style
Here are 3 things to check:

---Check to see if any metal pieces are touching the servo case
---Check the servo wire to see if it is crimped or possibly picking up intereference from other wires such as the throttle servo wire.
---Check to see if your antenna wire is touching your servo.

I actually drilled a small hole in the side of the receiver box so I could run the antenna out the side of the box and then up the tube to avoid contact w/ the servo. The NTC3 set-up manual actually shows the antenna wire going under the servo and up the tube. If you are set-up like this then this could be your culprit. The servo may simply be picking up intereference.

Let us know what you find.
 

igorkv

RCNT Racer
Messages
94
RC Driving Style
Digital Liquid said:
Here are 3 things to check:
I actually drilled a small hole in the side of the receiver box so I could run the antenna out the side of the box and then up the tube to avoid contact w/ the servo. The NTC3 set-up manual actually shows the antenna wire going under the servo and up the tube. If you are set-up like this then this could be your culprit. The servo may simply be picking up intereference.

Let us know what you find.
Iwas planning to do the same. Thanks.

Will do. Thanks.

This what I found using google. The guy from helicopter group. Wrote on 2001-09-06:

I have been using a Hitec 645MG high torque but not fast servo on my
1/8 car. I found it interfere with the other servo which is standard
servo, if I try to move stick. However, I move the other stick there
is not any problem at all. I guessed that because the 645MG interfere
with receiver cause the problem. So, I disassemble the Hitec servo and
add a small capacitor across the servo motor and add a capacitor on
the power wire inside the servo. And also, I add a capacitor to a
receiver power wire that would give the receiver a regular power
against the peak power required by servo start to move and stop. After
all jobs done, all problems are solved. That is my experience.
 

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