Anyway to slow the tail servo?

[Dan Masochist]

Hi im just setting up my dx6i and blade 300x, is there a way of slowing down the tail servo? The cyclic servo is nice and smooth but the tail is very fast compared.

I havent flow it yet.... kinda scared but will man up tomorrow.

thanks
Dan

[jimmyhorns]

You dont want to slow down the speed of the tail servo. You are not actually controlling that servo, the gyro is, you just tell the gyro what you want it to do (turn the tail left a bit, turn it right a bit, keep it still).

If you slowed down the servo (which you cant actually do, a servo is as quick as it is at a given voltage) you would impair the gyros ability to hold the tail for you.

If you are worried about the tail being 'twitchy' meaning that a small movement around rudder stick central position means a big movement on the tail, you can either reduce the travel on the transmitter's rudder channel, or add in expo to the rudder channel.

Reducing travel means that the gyro will never try and spin the heli at a full piroette rate.

Adding expo means that if you want the full piroette rate, its still there at maximum stick deflection, but around the centre of the stick, the response is much less sensitive (big stick movement = small tail movement).

I hope this makes sense, if it doesnt ask away and I will try and explain.

James

[Gixxer]

On your transmitter, go to D/R & Expo menu, select the rudder and set the expo to 10 and the D/R to 80 and see how it feels. If it's still too twitchy, add a little more expo... Just play with it until it suits you.

[Dan Masochist]

Cheers for the explaination Jimmy, i think i know what your on about. Coming from msr and mcpx rtf models to the 300 with a programmable tx is a bigger learner curve than i expected.

I've changed the d/r to 10% and expo to 80% will give it a go when the weather improves. Thanks Gixxer, im guessing your a biker? Im well into my bikes too got a 2009 zx6r and ktm exc250 for the dirt.

AND when i give it say left rudder it seems like it will stay full rudder even if the stick is back at center?? is this how its supposed to be?

[Ritchieme]

Dan

I'm very new to this hobby myself and I'm just about on 450 size, I don't yet feel qualified to answer many questions, however I was confused by the same thing. The reason the rudder does not return when you return the stick to center is because of the giro. If for instance you put a full left rudder on the stick, you are asking the heli to turn nose left, and returning the stick to centre won't change that as the giro is trying to follow your input, as an experiment, CAREFULLY slowly manually turn the heli in the direction you asked it to turn and you will see the tail pitch follow, as if like magic :-)

If I'm wrong I'm sure someone will jump in and save me :-)

Can you let us know how you get on when you get the chance to try it out. I'm interested to see how it feels going from a mcpx to a 300x

Ritchie

[Spanner]

AND when i give it say left rudder it seems like it will stay full rudder even if the stick is back at center?? is this how its supposed to be?

Yup, exactly how it should be in heading hold. If you move the heli about its mainshaft axis the tail will do the same. The gyro is giving a corrective input to try and bring the tail back to its original position, or hold the heading!

So, if you push left rudder on your TX and let go of the stick, the blades will stay where they are until the gyro senses the heli has moved to the left, so if you move the heli nose left the tail blades will straighten out, go too far and the gyro will give a right rudder correction.

If it was in rate mode, the tail blades would return to centre.

[Dan22]

Dan,
Don't you mean D/R to 80% & EXPO to 10%?

Regards,
Dan

[highlightshadow]

Doesn't the 300X use the AR7200BX?
In which case, by default out the box, does the Gyro come pre-programmed in one of the stock control behavior modes? (parameter menu B) ... it comes setup in Sport when you buy the gyro off the shelf..

Would it be sensible to switch the unit into Transmitter mode and then set DR/Expo etc in the Tx
Rather than leaving it in sport mode and also setting Tx DR/expo?

I do use one of the pre-set modes so i don't have recommendations for Tx settings but just don't want someone to get themselves in a mess

[Mark_T]

Would it be sensible to switch the unit into Transmitter mode and then set DR/Expo etc in the Tx
Rather than leaving it in sport mode and also setting Tx DR/expo?

The 300X comes set to transmitter mode and will stay that way even if you do a full reset on it as the firmware has been modified specifically for this model.

You can manually change it of course, but no need to do so unless you want to use on of the standard modes.

[Dan Masochist]

Tried hovering in the garden but its too windy at the moment, as soon as the training gear came off the ground i didnt feel in control so i'll try later if its calmer. Think the wind was catching the tg quite a bit, i could fly the mcpx in this no probs.
Going from the mcpx to this is a massive difference as i've only just got the dx6 so im trying to learn both. Wish i got the dx6 with the mcpx instead of the rtf.

Yea sorry dr to 80% expo to 10%, i did actually put it in the wrong way round and it was way too slow, oops.

[Dan Masochist]

Right i got it hovering but it doesnt feel right, its wagging its tail after a few seconds of hover. Also if i give it a bit of rudder on take off its fighting with the training gear as thats still dragging on the floor a bit.
Think the training gear might be coming off as its worse than my little heli at hovering.

[Gixxer]

It sounds like the gain might be too high. Go to the Gyro menu on the transmitter and turn the gain down a little... just enough to stop it wagging.

With the training gear on, you really don't want to be applying any input until it's clear of the floor.

[Dan Masochist]

Its currently set to 77% both normal and sport mode as per manual. How much should i drop it by?

Now i wish i ordered batteries from UK warehouse as im only running 1 pack and its gonna take ages to get right. Hurry up hobby king!

[Gixxer]

What I would do is drop it down maybe 2% at a time to start with, then once the wag disappears, come back up a little until it wags again, then lower it in small increments until the wag stops, then drop it a little more as a safety margin.

[Dan Masochist]

Got it hovering ok now i think with 72% gain on the gyro, still needs tweaking i think to get a setup i feel comfortable with.

Struggling to trim it with the wind in my backyard coming from different angles.

Now i just need my batteries to arrive and a nice calm day to set it up.

Cheers for the help peeps