replaced stock servos, throttle reversed?`

[ptc]

Hi!

I replaced all three stock servo's with Hitec HS-65 MG's. One of the stock servo's was dead and the other looked like it was dying, so I did all three.

In hindsight, the dead servo may be why I got wrapped up in a tree on that last crash, or it was the wind, or both.

These servo's seem move on the opposite direction as the stock because to get the swash to move correctly I had to reverse the AIL, ELE and THR switches on the TX.

When I reversed the THR switch, the swash moves in the right direction (up) when I push the stick up, however, the motor is at 100% when the stick is all the way down. I found this out the hard way by reversing the switch while the motor was plugged in and it immediately spun up <whew!!!>. I quickly moved the stick to midway after the bird did a little hop before I flipped the THR switch back to normal.

Anyway, is there anyway to program the stock Esky ESC so that the stick will behave normally (0% throttle at low stick, 100% at high stick) when the throttle switch on the TX is reversed?

[traeside]

Question, did the servos fit or did you have to do some trimming? Then also I guess you are using the stock receiver? I hope there is a fix for the ESC as I need to dump my stock servos as they have so much play there is no point in going threw and fixing the loose bal links

[traeside]

hey ggo look at this post in this section Esky EK0406A Transmitter - Whats it all about.

I think it will show you the switch inside you can flip and then you should be qable to return the front switchs back to normal.

[traeside]

sorry read it again and it will not do what i was hoping it would sorry.

[ptc]

Yes, I had to file two of the boxed holes for the servos and one of the servo's tabs to get them in. Very minimal filing though was required.

The HS 65MG's are about .5 mm longer than the stock, according to my digital caliper.

The third servo went in without any filing and all of the holes lined up for the mounting screws with no problems.

I had seen that thread on the explanation of the TX, however, you're correct, it won't help my situation.

Yes, I am using the stock receiver.

[DierWolf]

If worse comes to worse you can always open the back of ther servo and switch the polarity on the motor making them move in same direction as the stock ones did and return your dip switches to their normal position.

[another_finn]

Yep, those servos operate in the opposite direction from the stock Eskys. I believe you can reverse all but the front servo using the transmitter controls - but if you stick to the stock Tx, you'll have to reverse the polarity or cross the control rods on the front servo. No, I have no idea how you can make that work, but I've seen at least one guy do it successfully.

[DierWolf]

Only way i saw someone do it with stock TX was to change the polarity on all the motors of all 3 servo's.

Its not a big deal to do (if you have a soldering iron)

[ptc]

I fixed it the easy way.

I upgraded the TX/RX to a Futaba 7CH :YeaBaby: that was intended to go into the EXI 450 (Trex 450 clone) that I am (slowly) building.

Haven't finished testing everything yet, I am still going through the learning curve of programming the TX.

Thanks for all the replies.

[DierWolf]

LOL whats that now? 7 EXI 450 owners i know of on this site alone :)

[markr1109]

Ummm yeah. I just updated to Hitec HS55 servos and I'm having the same problem. Can anybody tell me how to reverse polarity on these servos?:thinking

[Ian 777]

Are you using the stock radio ?

[DierWolf]

If your using stock radio your going to have a problem.

If you using stock radio and you did the DTS Mod (Direct to Swash Mod) then you have an option.

Option with the DTS mod is to swap Servo Channels 1 and 6 and place the front servo on the right hand side of the heli.. this will do away with your problem