Servo gears stripping problem

[HobbitFertang]

Hi Folks, the throttle servo (HiTec HS81) gears on my Roundhouse Billy keep stripping every time I accidentally pull back on the Tx stick (PlanetTS2) instead of forward. Other than blocking the stick with something solid in the way, is there a tech solution inside the Tx to this expensive problem?? Of course I could tell myself to stop doing it . . . . . ahem.

 

[PhilP]

Other than blocking the stick with something solid in the way, is there a tech solution inside the Tx to this expensive problem?? Of course I could tell myself to stop doing it . . . . . ahem.

You can adjust the linkage to increase / decrease the travel mechanically.

You can use the trim pots on the transmitter.

You can fit a physical stop, do you can't move the stick too far.

You can (invalidates warranty) open up the transmitter, and fiddle with resistor values either end of potentiometer track for that stick.

Or you could swap to a system that allows you to set the amount of travel.


PhilP.

 

[HobbitFertang]

Thanks Phil. The stick is sprung to centre itself. Is that the wrong style for a throttle?? (It was how it came from Roundhouse)

 

[dunnyrail]

Centre Spring to my recollection is pretty standard. There are pro’s and con’s to it. On the plus side if you drop the transmitter the spring will return to stop on both the regulator and reverser if both sprung, doing that on the revercer can be a problem if in full flight. For myself I initially took the spring out on the revercer and then on the reugulator.

However these days I use all Fosworks hand Tx units as they are much easier, though not able to adjust the throw with them but if you have that mechanically correct so that your servo is not “chattering” then trashing the gears should nit occur.

 

[PhilP]

Thanks Phil. The stick is sprung to centre itself. Is that the wrong style for a throttle?? (It was how it came from Roundhouse)

Your choice..

There is something to be said for a sprung regulator. IF, the system is setup for the centre point to be 'stop'.

There again, some people prefer to be able to put the transmitter down, or have a free-hand for a beverage.

The Simples solution, is a strip of plasticard across the axis of the syivk. Physically limiting how far you can push it?

PhilP.

 

[HobbitFertang]

The strip of plasticard sounds the answer in my case

 

[Rhos Helyg Loco Works]

The simple solution is to set up the r/c on the loco correctly! Surely any spring on the regulator stick will make it go to "half open" rather than shut...? Best thing to do is to replace the springs with ratchets (the transmitter has fixings for them) so the sticks stay where they are put.

You could, of course, replace them with HS82MG (metal gear) servos, but it will be the servo motor that will suffer if asked to do anything it does not like.

 

[GAP]

simple solution take the spring out or move the servo to a channel that is not spring loaded. Throttles on model aircraft are not spring loaded
set stick to full down and adjust linkage to throttle closed; move stick up till servo is at full throttle mark that position then put a strip of styrene across the mark as a physical barrier pull stick down train throttle closes push to stop throttle full open. After that its just a matter of setting the throttle position for speed.
That is how I have my Ruby set up

 

[Paul M]

That's very odd! The transmitter my Billy was supplied with was set up so that the whole length of travel of the LH stick controlled the speed, I removed thr spring to make things easier