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What do you look for in a servo?

What do you look for in a servo?

Old 01-24-2013, 09:56 AM
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Default What do you look for in a servo?

I currently have a 2WD SC using a spektrum s6040. I found another on the forums for my ST. I have a 2WD buggy on the way.

What specs do you look for in a servo for the various classes?
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Old 01-24-2013, 10:18 AM
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the 6040 is a good servo, i use one in my 1/10 4wd buggy, 1/10 2wd buggy and in my 1/10 stadium truck.

you can look at the specs of a particular servo to see torque and speed.
look at the specs for the 6040 and compare to others. since you know how the 6040 works you'll have a good idea weather or not you want more speed or power. but that 6040 will be good in just about anything 1/10 scale.
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Old 01-24-2013, 10:34 AM
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i look 4 servos like these..they make 3 differnt ones I own all 3.. but the green is my fav.. all my vehicles run thes.. I drive a Losi SCTE..


Radiopost servos are the only servos in the market using robot actuator technology and 32-bit resolution allowing ultra quick response and precise movement. They have an aluminum heat sink to dissipate heat. Ultra efficient coreless motor with a titanium-hybrid gear system powers any application. RP2307M Multi-Type servo is ideal for any application.

Model: RPS2207M (Multi Servo)
Voltage: 4.8V ~ 8.4V
Operating: PWM
Torque:
@ 6.0V: 249 oz in
@ 7.4V: 305 oz in
Speed:
@ 6.0V: 0.08sec/60
@ 7.4V: 0.07sec/60
Dimensions: 41.4x20.7x37.8mm (Without wing bracket)
Weight: 65g
Replaceable mounting tabs
Excess wire can hide inside servo case (no more cutting wires apart to shorten)
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Old 01-24-2013, 01:44 PM
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I run the 6040 in my 4wd SC (Tekno now, was the Losi) and have no complaints. Some buggies though, will be much easier to work with when using a low profile servo.

Servo speed is a preference to a degree. I like a fast servo, but unless you're good with that instant response, having too fast a servo can make you twitchy and overcorrect really easily (though this is also generally correctable with expo).

That being said, I generally aim for a .08 or .09 for speed on everything so my cars have consistent response time across them (same feel for steering response), and then just pick a servo with enough torque for my application.

My general recommendations for torque:
10th scale buggy: 90+
10th scale 2wd truck: 120+
10th scale 4wd SC: 150+
8th scale buggy: 250+
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Old 01-25-2013, 05:19 AM
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Originally Posted by justpoet
I run the 6040 in my 4wd SC (Tekno now, was the Losi) and have no complaints. Some buggies though, will be much easier to work with when using a low profile servo.

Servo speed is a preference to a degree. I like a fast servo, but unless you're good with that instant response, having too fast a servo can make you twitchy and overcorrect really easily (though this is also generally correctable with expo).

That being said, I generally aim for a .08 or .09 for speed on everything so my cars have consistent response time across them (same feel for steering response), and then just pick a servo with enough torque for my application.

My general recommendations for torque:
10th scale buggy: 90+
10th scale 2wd truck: 120+
10th scale 4wd SC: 150+
8th scale buggy: 250+
Thanks! Exactly what is was looking for. I really like the 6040 but I figured torque was overkill for a buggy. I was more after guidelines as I prefer not to have to try out a bunch of servos to get a feel for it.
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Old 01-25-2013, 10:21 AM
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Having extra torque is never a bad thing (and won't be noticed), so if you want to stick with the same servo for several vehicles, making it easier to grab a spare of fix a more favored vehicle for a series, etc...go for it.
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Old 01-26-2013, 08:40 AM
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A slower servo might actually be more of your driving style as well. One of my racing buddies actually dropped a few tenths of a second just by installing a slower servo. A lot of the new radios actually have a setting where you can slow the servo down from the radio. I had to slow down the steering response on my XB4 down by 30% from a speed servo.
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