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T-REX 600 › Servo/Ball Link binding
01-16-2010 04:52 PM  8 years agoPost 1
Flyinrazrback

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Fort Smith, AR

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I am setting up my 600esp, using DS610 servos, align servo wheels, etc. The ball link on the servos is rubbing pretty hard against the case. What have you guys done to fix this?

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01-16-2010 05:08 PM  8 years agoPost 2
FlaG8r

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Florida

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doesn't look like it in the pic...not sure of a fix, but I wouldn't fly them like that.

Life is tough, it's tougher if you're stupid

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01-16-2010 05:13 PM  8 years agoPost 3
Flyinrazrback

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Fort Smith, AR

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In the pic you can see the curved gouge on the top of the case.

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01-16-2010 05:17 PM  8 years agoPost 4
FlaG8r

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Florida

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Oh, yeah, that's no good. You've verified thats the correct side of the servo wheel that the ball links need to go on?

*I wouldn't worry about damaging the servo, it's the restricted servo movement I'd worry about.

At this point, since its already dug a path in the case, if it runs smooth and doesn't touch anymore, I wouldn't worry about it.

Life is tough, it's tougher if you're stupid

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01-16-2010 05:18 PM  8 years agoPost 5
george0079

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USA

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Are those aftermarket balls? I've never seen the stock balls rub like that

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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01-16-2010 05:26 PM  8 years agoPost 6
Flyinrazrback

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Fort Smith, AR

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The ball links are on the correct side. The ball link is still grinding into the case. Running out of ideas, so I pulled the horn off the servo to tighten down the ball links and they were as far as they are going to go. So, I found some micro washers and dropped them into the opening of the servo horn, this way when I tighten down the screws it would space the horn out about 1mm away from the case. The horn does not go down all the way now, but it goes all the way down less the 1mm spacer. It still seems very rigid and no twisting. I hope this will fix it unless you guys have a better idea.

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01-16-2010 07:43 PM  8 years agoPost 7
duke666

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Hampshire, UK

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Are they deffinitely the right balls? They may be a longer version. Worth measuring and comparing to the manual. I too have never heard of this problem.

Don't like the idea of looseing 1 mm of spline on the wheels

Duke

OOOPPS............

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01-16-2010 09:47 PM  8 years agoPost 8
Flyinrazrback

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Fort Smith, AR

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They are the ones that came with the kit.

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01-16-2010 09:49 PM  8 years agoPost 9
george0079

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USA

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Try a different/new set of servo wheels.

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

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01-17-2010 06:33 AM  8 years agoPost 10
duke666

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Hampshire, UK

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They are the ones that came with the kit.
They may be the ones that came with the kit but have you measured their length and checked against the manual? If the wrong ones were placed in the kit, just 1mm longer would cause that. Just because they were in the kit in the bag does not mean they are correct.

Does this happen with all three servos or just this one?

Duke

OOOPPS............

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01-17-2010 11:55 PM  8 years agoPost 11
FloridaHeli

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jacksonville, florida

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Problem fix
I see the problem. Look on page 20 of the Trex 600CF manual. The ball links are on the wrong side of the servo wheel. They are supposed to be on the outside of the wheel not between the wheel and servo. Moving them will fix it. If the linkage rods rub the wheel you'll have to install servo horns as shown in the manual; 2 each 180 degree arms.

That will fix it.

This hobby is WAY too expensive!!

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01-18-2010 12:12 AM  8 years agoPost 12
Flyinrazrback

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Fort Smith, AR

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I have the ESP, in the ESP manual it shows the ball links on the inside of the servo arm. Also, if they go on the outside they will rub the canopy. I already have posts in the front to move the canopy out so the main gear does not rub (canomod canopy).

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01-18-2010 12:40 AM  8 years agoPost 13
FloridaHeli

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jacksonville, florida

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Fix NOT found
Flyinrazrback

You are 100% correct. Just checked the inside of my canopy and mine are rubbing on both sides.

I have used the washer trick you mention above to solve this type of problem on other helis. I don't LIKE to do it but it could be the only solution. You'd think after so many of these have been built someone would have found a better solution.

Appreciate you bringing this up. Looks like I have the problem on 2 T-600e's. I DO like they straight alignment of the linkage rods in your set up.

I'm going to look at your solution of moving the canopy out a little.

This hobby is WAY too expensive!!

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01-18-2010 03:27 AM  8 years agoPost 14
Flyinrazrback

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Fort Smith, AR

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I am going to the hobby shop tomorrow and see if they have some shorter ball links, but these are very short, and will see if they have any other servo wheels to try. If neither of those work out guess I am stuck with the fix that I have. The wheel still has a ton of bite in the wheel even with the washer in there.

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01-19-2010 05:44 AM  8 years agoPost 15
Flyinrazrback

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Fort Smith, AR

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Ok, I got 3 new align servo wheels, and a pack of the correct balls as well, they were the same as what was on it. Played around with new wheels and even changed the balls, and it still rubs.

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01-19-2010 06:04 AM  8 years agoPost 16
Ken4

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Singapore

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No wonder align doesnt provide servos for this kit.

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01-19-2010 04:48 PM  8 years agoPost 17
Flyinrazrback

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Fort Smith, AR

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I am just going to use my fix for now but about to order some futaba brushless servos to replace them.

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01-19-2010 10:43 PM  8 years agoPost 18
FloridaHeli

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jacksonville, florida

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Changed my ball links on servo horns
Flyinrazrback

First I'm going to thank you again for pointing out this problem. I have moved the Stock Balls to the other side of the servo horns. As you can see in the photo below the ball clears the servo by 1mm. The servos are JR DS8311 with cut down stock arms on them.

Don't know if this helped you but it sure helped my 600e. Now the linkage rods are straight and nothing rubs the canopy.

You might want to check the dimensions of the Align, JR and Futaba servos to see if the JR are shorter in this area than the Align. You might be better off with JR. Just a thought.

Good luck and please advise what you end up with.

This hobby is WAY too expensive!!

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01-20-2010 11:55 PM  8 years agoPost 19
Flyinrazrback

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Fort Smith, AR

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I found the fix and it took all of 1 minute to make it happen. The align ball links have a spacer built into them at the bottom, this extra 1.5mm added on to the bottom of the ball causes it to rub the align servos when using the align servo wheels. I took my dremel and recessed the plastic servo wheel where the ball link sits so that built in spacer on the ball link goes down into the plastic about 1mm when you tighten it down, and now I have about 1mm of clearance between the servo and the ball link. Kind of feel like an idiot for not thinking of this in the first place.

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01-21-2010 03:32 PM  8 years agoPost 20
JLHarv

rrNovice

Auburn Hills, MI-USA

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Flyinrazrback,
What you did looks like it will allow the ball not to rub the servo case, but what about the barrel of the ball link connector? When you move the servo to it's exremes dose that barrel rub the servo horn?

I have built a bunch of Align helicopters and getting the clearance and angle of these linkages on the 600 esp was one of the biggest pains I have run into. I think there is room for improvement on the design here.

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T-REX 600 › Servo/Ball Link binding
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