GT3C - increase servo throw

[The Modfather]

Hi all.

I'm not sure this is even a thing, but wanted to ask anyway. I have a stock GT3C that I use with my SCX10 II. I am interested in learning if it's possible to increase the throw (rotation?) of the servo. The servo I have is supposed to be capable of 180º, but I seem to get around 140ish (just an estimation). Servo here: https://www.amazon.com/gp/product/B0...&tag=pda0fc-20

Anyhow - I have tried using the RCC search, as well as Mr. Googley. My issue is that I may not be searching for the right terminology - OR - what I'm asking for is impossible...heh

Thanks in advance all!

-Moddy

[magic_yeti]

What you need is to adjust the endpoints of the ch.
Don't know the range I think it's limited to.max 120%

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[The Modfather]

Originally Posted by magic_yeti

What you need is to adjust the endpoints of the ch.
Don't know the range I think it's limited to.max 120%

Send by my Pixel 2 XL with Tapatalk

Perfect, thank you! I have searched all over - for the wrong words and phrases - repeatedly. So frustrating.

[Hydrocarbon92]

The advertised servo angle is misleading, it's like saying a gearbox can withstand 1000hp but hooking up an ordinary V8 doesn't mean you get 1000hp.

A typical radio gives you 90 degrees at "100%" and 108 degrees at "120%", regardless of it being a standard or 180* servo. I have noticed a 90* signal will result in 90* on some servos and >100* on others. IF your radio can provide 200%, then you'll get 180* of twist and full resolution. To get 180* with a normal 90* TX you need a module that "doubles" the RX's output range or mod the servo, but resolution will be halved with those methods.

I've never seen a servo angle extender, but I've considered making them. To mod the servo you must add resistors to the outer legs of it's pot. I did this many moons ago to a Cirrus but do not recall what the values were.

[The Modfather]

Originally Posted by Hydrocarbon92

The advertised servo angle is misleading, it's like saying a gearbox can withstand 1000hp but hooking up an ordinary V8 doesn't mean you get 1000hp.

A typical radio gives you 90 degrees at "100%" and 108 degrees at "120%", regardless of it being a standard or 180* servo. I have noticed a 90* signal will result in 90* on some servos and >100* on others. IF your radio can provide 200%, then you'll get 180* of twist and full resolution. To get 180* with a normal 90* TX you need a module that "doubles" the RX's output range or mod the servo, but resolution will be halved with those methods.

I've never seen a servo angle extender, but I've considered making them. To mod the servo you must add resistors to the outer legs of it's pot. I did this many moons ago to a Cirrus but do not recall what the values were.

Great info. Thanks for teaching me! Not sure I wanna mod the servo, so I'll play with the end point thing and see how that plays out.

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[losikid]

You need to get a widget to expand the servo signal. Such as

https://www.servocity.com/180-servo-stretcher

180º Servo Expander - Flytron

https://www.mr-rcworld.co.uk/shop/18...mera-expander/

[The Modfather]

Originally Posted by losikid

You need to get a widget to expand the servo signal. Such as

https://www.servocity.com/180-servo-stretcher

180º Servo Expander - Flytron

https://www.mr-rcworld.co.uk/shop/18...mera-expander/

Thanks for the links! These look like they will fit the bill

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