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T-REX 500 › T-Rex 500ESP servo throw
04-08-2010 03:13 AM  8 years agoPost 1
kman

rrNovice

Broken Arrow, OK.

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I'm sure I am doing something wrong here but I have my Aileron/Elevator/Pitch servo arms parallel with the swash, linkage rods the same length/90 degrees to the swash and the swash is level with a zero pitch on the main blades. I have reset my TX so everything is at zero. No trim/subtrim. The Elevator servo has more +/- throw when applying pitch than the A & P servos. Am I missing a mix/swash setting? I am using a 10CHG TX. Thanks.

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04-08-2010 03:19 AM  8 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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Double check that A/P/E endpoints are all at 100%.

Make sure you have selected the CORRECT swash mix type in your TX.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-08-2010 03:28 AM  8 years agoPost 3
kman

rrNovice

Broken Arrow, OK.

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Thanks Dave,

All endpoints are at 100%. Swash mix type is set at HR3.

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04-08-2010 03:44 AM  8 years agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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Silly question, but you do have all three ball links the same distance out from the center of the servos, don't you?

Also, swap the plugs of the Elevator servo with one of the other two servos and see if the servo that's now plugged into the elevator socket has the same problem, and see if what was the elevator servo behaves as it should.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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04-08-2010 03:50 AM  8 years agoPost 5
cwright

rrKey Veteran

Blossvale New York

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It is not uncommon to use end point adjustments to get the swash level at high and low stick. Not all servos will move exactly the same as some may have a little more travel then another one even though they are the same servo. Using a small amount of end point should help. I would not use more then say 5. That is how I do mine. If you need to much more then that I would double check the mechanical setup again. Hope this helps. Chuck

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04-08-2010 04:10 AM  8 years agoPost 6
dkshema

rrMaster

Cedar Rapids, IA

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I guess I was thinking there was a gross amount of difference, not a small amount.

But as CW noted, if the swash is level at mid stick and everything neutral, but as you approach full + or - collective pitch, you find one or more servos has too little or too much travel, use the endpoint settings for THAT channel to increase or decrease the travel so that the swash remains level from full negative through 0 degrees to full positive pitch.

This

https://rc.runryder.com/p4050614/

should tell you all you need to know about what all the different control settings do for your CCPM heli. Included is the description of what the endpoint/ATV settings will do for your swash movement.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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