BLS251 Doesnt feel smooth

[sacko]

When turning my BLS251 by hand it doesnt feel that smooth at all. When powered on, in and out of the model its exactly the same.

Before I take it out and maiden the Vel, I just want to check this is ok, or if anyone else has found this.

[gazza]

Mine didn't either mate.
I stripped it out, cleaned & re-lubed with Futaba servo gear grease & it was still the same. It used to have a slight tight spot at mid range when turned by hand.
Worked perfectly though

[sacko]

Cheers, just posted for re-assurance. Wonder why its like that for?

[spiderspid]

I honestly can't remember if mine felt notchy but it defo sounds like a "bag of spanners" when working but rest assured that is normal

[fudded]

Agree with all the above I have 2 and both seem a bit notchy, but work very well


Sean

[LaurenceGough]

Yep, normal. It will wear in and become smooth (along with some slop too...) It's because all the gears are so tightly meshed to start with. The BLS cyclic servos are the same.

[sacko]

Top banana, cheers. Tail felt good a minute ago, shame the head wobbled like a b*tch!

[pgkevet]

ds620

I've been messing about with one that failed on me about a year ago.. I was using it on throtle and it made a nice auto..

As best I can understand my results.. the motor runs fine but there has to be a positional sensor underneath the output shaft that feeds back to control the motor. If I turn the output shaft by hand I can find the dead spot that co-incides with the position and motor slows right down but doesn't quite stop. If I re-assemble (with new gears) and with the output gear offered up both ways around the servo promptly jams.

I'm guessing that the sensor isn't quite working right and after playing for an hour it's back in the spares box.

..just wondering now whether I should have sprayed it out on underneath the output shaft in the 'electronics bay' with somethign to try and clean that sesnor..if that's possible...


Darn! My bad ..meant to start new thread and hit the wrong thing.. Doh!
..anyone fixed one of these?

[Helimadlarry]

I have BLS251's on all my helis, and every one feels notchy when you turn it by hand. I actually took one apart to see if the nylon gears had stripped. (it hadn't) lol. Call me over fussy, but when you have the fate of £1000 worth of heli resting in a posssibly dodgy tail servo your going to check it out.