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Old Sep 13, 2014, 06:35 PM
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United States, CA, Union City
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KST DS225MG Sero arm slipping

I installed KST DS225MG servo on my new Tanga. I was centering servo and checking my linkages. I noticed when I pushed the control surfaces, they would not stay centered. Felt something was slipping. What I think I am seeing is the plastic servo arms are slipping on the splined output shaft. Has anyone noticed this or can verify this???

I tried some servo old Hitec servo arms that fit a HS-65HB. Hitec arms seem to not slip.
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Old Sep 13, 2014, 06:37 PM
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I should mention. The servo seem to be very smooth and quiet
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Old Sep 16, 2014, 09:59 PM
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Harbor City, CA
Joined Oct 2003
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It could be a fluke, or did all of the supplied arms slip?
If a fluke, ask the vendor to get you some more arms Aloft?
Was this for the flaps?

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Old Sep 17, 2014, 01:59 AM
Marco Generali - italsoaring
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Cremona, Italy
Joined Nov 2010
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Quote:
Originally Posted by dbaya View Post
I installed KST DS225MG servo on my new Tanga. I was centering servo and checking my linkages. I noticed when I pushed the control surfaces, they would not stay centered. Felt something was slipping. What I think I am seeing is the plastic servo arms are slipping on the splined output shaft. Has anyone noticed this or can verify this???

I tried some servo old Hitec servo arms that fit a HS-65HB. Hitec arms seem to not slip.
It happens on older ds225 (produced more than 5/6 months ago).
The teeth of the servo arm are a bit tight and became loosen when it's pushed in place.
I've told about that at kst and now the material and the mold of the arm has been updated

I suggest you to go with the metal arm ones instead
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Old Sep 18, 2014, 09:43 AM
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United States, CA, Union City
Joined Mar 2004
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Thank you for the input. No fluke. It happened on all the wing control surfaces. I did get them from Aloft. If he does have the new type and I ask, they will probably be here the next day.
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Old Sep 18, 2014, 04:29 PM
Detail Freak
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Harbor City, CA
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Please keep us updated, Dominic.
Thanks.
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Old Sep 18, 2014, 05:20 PM
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Suomi, Lšnsi-Suomi, Uurainen
Joined Jan 2004
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All the nylon servo arms of the early KST servos were a bit loose, the metal arm is tight and the nylon arms can be tightened with chip bag material.
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