Servo problem? Any suggestions??

[Naushad]

Hi,

I just finished rebuilding my Kyosho ZX5 FS1.

So I took the car outside just to test drive it. The surface was tarmac, so I adjusted the slipper accordingly. The Speedo is a KO PROPO VFS-1 BMC and I've got an Orca 8.5T installed.

When I attempted to steer (whilst on throttle) the centre point of my servo goes offline as it returns. This happens frequently to the extent I have to repeatedly adjust my sub-trim on the transmitter to find the centre point (I'm using a Ko Esprit 3). Obviously, this is very frustrating and I can't race! I don't get this problem with my Bmax4 however.

Now, I've got a KO PROPO 2133 FET servo installed. Although I haven't had time to look into the issue in more detail, I intend to check the servo itself (which I doubt is faulty) and the attached saver. I may swap servos to check, but this is so much hassle!!

Could it be that the sheer torque from my brushless motor is proving too much for the servo to handle? Or is the servo losing power? (i.e. which a capacitor issue may resolve)

Any suggestions would be welcomed!

[sosidge]

I suspect the problem is in either the servo horn or the steering assembly itself, rather than the servo, since the same electrics work OK in another car.

Check that the horn is a precise fit on the servo, check that the servo saver is not slack, and check that the steering assembly is not binding up.

[Naushad]

I'll be doing just that...but good to know I'm thinking on the same lines!

[john333]

Don't the pots wear out on those transmitters? not had one so can't say from experience but something I'd heard. That would cause your steering to act weird if the servo etc is OK.