RC India

Guys,

Is it possible to limit the throttle range that instead of going 0-100 it should go lets say 0 -60 ? That is when we move the throttle stick right up, then instead of the ESC supplying the full power to the motor, it supplies less.


Pankaj

program your transmitter  to 60 %  throttle

+1 Mr Sai,
If you have a decent computer Radio, I guess the End-Point adjustment is the best way to go. Its easy and reliable as long as you can save the model setting on your Tx.

How? On a Dx6i, what is this called? any idea?

i would not fiddel with the endpoints as the esc has to recognise the low's and the high's of TX before initiating and this will reduce your range of throttle... also setting the tx to the 60 range is fine but it all depends what you want the head speed (if helis) or prop speed (if aero). however governors work on a different fashion... the head speed remains constant irrespective of your throttle (usually the throttle curve on governor mode is horizontal). this helps a lot especailly in heli's when you are doing 3D as the increase / decrease in the cyclics or the pitch will tend to increase or reduce the headspeed (usually it reduces). this can be trimmtted by using your P-Mixes in your TX but this will not still get you a constant head speed.. this is where the governor plays an important role...
eg: in a heli when you do a nose left piro the headspeed will reduce and the heli will tend to loose height but in governor mode the ESC will sense this and keep the heli in this current altitude by giving power to the motor during this piro and maintain the headspeed contstant. the setting is done using a ESC link and software and with a tachometer... check our bob finless video at helifreak for the castle creation phoenix 80A ESC. explains it quite well.

let me check how to set your throttel curve on DX6i throttle ... wil get back shortly

just checked on the dx6i TX... you have a 3 point curve.. if flying on normal mode swith the left hand side switch to the bottom position and set you lowest point to 0%... mid position to around 40% and the high position 60%.. this will be good for you to take off you plane around the bottom middle to middle throttel stick.

But it looks like reducing the range of throttle is exactly what he wants, so adjusting the endpoint would be a simple way of achieving it.

On JR/Spektrum systems, it would be called something along the lines of "Travel Adjustment" (ATV).  "End Point Ajustments" (EPA) is the Futaba name.

Anwar, as stated earlier the problem with adjusting with end points is that the ESC would not recognize the low throttle end point and the high throttle end point.. (the ESC should arm itself at the lowest endpoint be it 100% above or below and the same goes to the high end points.. certain ESC's get 100% throttel at 70-75% end points or event at 115 end points like mine which i have on my trex 500... so it does not mean that shifting the end points will get the throttel range that one requires... the easiest way for a non - governor esc is to limit the max to 60% in the throttle curve.

While what you are saying is very clear, we have to remember on thing.  Pankaj is only talking about shifting ONE of two end points (the high one).  Most ESCs would support it. 

What you are suggesting is a cleaner way of doing it though, but involves a bit more programming.

i still differ with this point.. i will try to upload a video when i get the time to shoot it on how the rpm / headspeed of the props / blades differ when you have the high end point at 60 and also show the difference on the same with having the throttle curve maxed at 60. my case is that the end points of your throttle channel should be changed so that the ESC gets to know the highs and lows of your transmitter... however as a beginner this would not make such a large difference but when you start programming your ESC's later in advanced stages this will make a very large issue.

Guys,

Just checked the manual of Dx6i. The throttle curve is part of Heli programming while I was looking for planes. So I guess the only alternative for me is the end point adjustments.

Pankaj

You can cheat if you want by using a "heli" model that does NOT use CCPM 3 servo mixing.