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What the newest cheap servo hotness?

I tried the Kingmax on higher volts and anything above 8.0v it would stutter/hang horribly - barely even move. I turned it down to 7.75v and it seemed the same speed as the 6221 at just 6v. So I only recommend the Kingmax if you can run 7.4v (NOT 2S direct) or want a fully sealed servo.

I have a good idea that there's 2-3 actual designs that cover all these 20kg servos. JX seems to be decently faster but with lower resolution. The others are waterproof, have different gears, better resolution, but are slower.

I also tried the 5932 on 8.25v and it's lightning fast.
 
The 6221 I had was in a stock bomber. I only ever ran it inside on a course I made of sofas and boxes. It did take a few falls from that but nothing major.

I was powering off a trackstar esc it was at around 6v I think. Not sure if underpowering a servo would result in higher amp draws and in turn damaging servo but when I swapped in the powerhd it was very glitchy and inconsistent on that same esc until I swapped in the castle bec set at 6.6v.

I did give in and ordered a castle x system to compare to the trackstar setup so I will be able to eliminate my bec.
 
Bbknucks said:
The 6221 I had was in a stock bomber. I only ever ran it inside on a course I made of sofas and boxes. It did take a few falls from that but nothing major.

I was powering off a trackstar esc it was at around 6v I think. Not sure if underpowering a servo would result in higher amp draws and in turn damaging servo but when I swapped in the powerhd it was very glitchy and inconsistent on that same esc until I swapped in the castle bec set at 6.6v.

I did give in and ordered a castle x system to compare to the trackstar setup so I will be able to eliminate my bec.
Click to expand...
Hmm... any chance the endpoints weren't set?
 
Exactly. I've had it happen with more expensive servos too. And this didnt feel nearly as bad.

I got the 5932 in and this servo is freaking sweet. I set it at 7.5v. It's fast strong and quiet. We will see how long it does. I also installed a mamba x so the bec was removed.
 
I'm planning on running it a little lower than max too. I just have a feeling the gears will be the weak spot, judging from the failure of most expensive servos.

Another JX I'll be trying is the 6208. It's $11 and internally seems to be a 6221 but with less gear reduction. It's as fast as the 5932 but obviously less power than a 6221, but I plan to use it for light on-road cars. Definitely the fastest $11 servo I've seen.

Also I figured out how to hack the voltage on a Hobbywing 3A UBEC. When you remove the metal cap, there are 3 resistors in a column above the 8-pin chip (pin header is to the left). The top resistor should be 39k. If you replace that with a 47k resistor, your new outputs are 6.1v and 7.0v. If you add a 10k pot in series (49k), the new voltages are 6.3v and 7.2v.

The LED might burn out eventually with higher voltage modification but who cares. The chip used is a MP1593, similar to the chips I posted about much earlier.
 
Hydrocarbon92 said:
I'm planning on running it a little lower than max too. I just have a feeling the gears will be the weak spot, judging from the failure of most expensive servos.

Another JX I'll be trying is the 6208. It's $11 and internally seems to be a 6221 but with less gear reduction. It's as fast as the 5932 but obviously less power than a 6221, but I plan to use it for light on-road cars. Definitely the fastest $11 servo I've seen.

Also I figured out how to hack the voltage on a Hobbywing 3A UBEC. When you remove the metal cap, there are 3 resistors in a column above the 8-pin chip (pin header is to the left). The top resistor should be 39k. If you replace that with a 47k resistor, your new outputs are 6.1v and 7.0v. If you add a 10k pot in series (49k), the new voltages are 6.3v and 7.2v.

The LED might burn out eventually with higher voltage modification but who cares. The chip used is a MP1593, similar to the chips I posted about much earlier.
Click to expand...
You can do that with pretty much any switching UBEC. In fact, for less money, you can buy adjustable buck converters that come with a pot instead of a fixed resistor. :)
 
Bbknucks said:
Exactly. I've had it happen with more expensive servos too. And this didnt feel nearly as bad.

I got the 5932 in and this servo is freaking sweet. I set it at 7.5v. It's fast strong and quiet. We will see how long it does. I also installed a mamba x so the bec was removed.
Click to expand...

Mine arrived today and Ive whacked it in my bomber...feels good at 7.4v.
 
Jim85IROC said:
You can do that with pretty much any switching UBEC. In fact, for less money, you can buy adjustable buck converters that come with a pot instead of a fixed resistor. :)
Click to expand...

Oh yeah, I've got a bunch of mp1584's, 2307's and 2315's lol. It's just that this UBEC is common among r/c'ers and it's already wired for r/c work.

I did more math and you can use a 30k resistor in parallel with the 10k resistor (closest to chip) and get 7.4v on high and 6.6v on low. That's perfect for testing ESC voltages.
 
Stumbled upon this while searching on Banggood:

https://www.banggood.com/JX-BLS-12V7146-46KG-12V-180-Degrees-HV-Steel-Gear-Digital-Brushless-Servo-For-RC-Robot-p-1180609.html?rmmds=search&cur_warehouse=CN

After experiencing the Holmes SHV500, I am a big fan of servos that run directly off 3s voltage. This is the first cheap 12+V servo I have seen.

650 oz of torque on 14V is pretty serious for a $60 servo.

Also available with a standard cordless motor for a few dollars less.

https://www.banggood.com/JX-CLS-12V7346-46KG-12V-180-Degrees-HV-High-Precision-Steel-Gear-Digital-Coreless-Servo-For-RC-Robot-p-1180608.html?rmmds=detail-left-hotproducts__2&cur_warehouse=CN
 
just ordered the 6221mg after seeing the bench test video. ill let you all know how it does.


thanks"thumbsup"
 
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I have read through this entire thread and only found one obscure mention of the Savox 1230SG and I'm wondering why that is. Does no one run a Savox? This servo specs out at 499.9in-oz on 6v for $69 which strikes me as pretty decent value. I'm running three of them now without a single glitch or problem in over 300 hours of run time and I'm just curious why so little mention of them.
 
Last edited:
^^Seems like a good deal. "thumbsup"

I have a Savox 0231, about half as powerful, and about half the price. Works very well. Mine is a lighter weight class2 rig and so far it's been powerful enough. Runs on the BEC on the ESC with no issues.
 
Next candidate for testing: JX CLS5830HV

Motor: Coreless
Operating Speed 6.0V: 0.11 sec/60°
Operating Speed 8.4V: 0.09 sec/60°
Stall Torque 6.0V: 24.7 kg.cm (343 oz-in)
Stall Torque 8.4V: 30.3 kg.cm (420 oz-in)

Waterproof

Between $34-$38 various locations...
 
What's the average shipping time from that vendor, I wonder... It's not too bad from rcmart...
 
durok said:
Next candidate for testing: JX CLS5830HV

Motor: Coreless
Operating Speed 6.0V: 0.11 sec/60°
Operating Speed 8.4V: 0.09 sec/60°
Stall Torque 6.0V: 24.7 kg.cm (343 oz-in)
Stall Torque 8.4V: 30.3 kg.cm (420 oz-in)

Waterproof

Between $34-$38 various locations...
Click to expand...

Asia-Tees - big china online retailer. I bought some stuff from them, all good, fast shipping.

Would be nice to see some ah ratings for it - wondering if if would run on the HW1080 BEC.

I may drop one in my cart next time I order something from them. "thumbsup"
 
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