OMG SERVO REVIEW

After receiving some sample servos from OMG company of China, HDT064200C, and LDT062200B, coreless and brushless respectively, I unpackaged them and what I found were very nice , well engineered servos.

They both have aluminum center case anodized in green for better cooling, both have TG (titanium gears) for long lasting without slop.

The brushless servo example I received is of the low voltage variety, meaning 5to 6 volts, while the coreless servo is of the high voltage , 6 to 7.2 volts.




Both servos have 20 kg of torque and the speed is .18s/60 degree for the coreless and .07s/60 degrees for the brushless.

Now for the test.

First, the coreless “HDT064200C”, was set up for centering precision, and speed, on lipo battery.
The centering test showed repeated precision, to be as good as any I used or tested.
As for speed, it is as fast as claimed, but what I was amazed at, was the response time from the transmitter , again better then most I have seen.

Now for the Brushless “LDT062200B”, using lower voltage, of 6 volts .
The speed and centering is absolutely first class. But one thing I did notice, the brushless was much more quiet then the coreless, although the coreless was well within the noise level of other digital servos, and a bit more quiet then many.

For the not so good part:
The only thing I didn’t like was the servo wheels included , they are OK lower class servos, but I believe better servo arms should accompany these first class servos.
With this being said, most people using these servos will most likely go with after market arms…

I am now building a 55% Scale Pitts S2A and will be using these servos for controls…

OMG servo centering test (1 min 10 sec)

Cool Roger, any torque specs? Also a question, when servo manufactures say titanium gears, do the mean actually machined from titanium or titanium nitride coated?

Instead of a pic of some pretty gears lets see the quality of soldering on the board and motor as well as the stress reliefs on the leads where they attach to the board.

Originally Posted by N726AC

Cool Roger, any torque specs? Also a question, when servo manufactures say titanium gears,
do the mean actually machined from titanium or titanium nitride coated?

Brand "owner"? has started a page with OMG - full specs on RCG.

"both have TG (titanium gears) for long lasting without slop."
Also as in post #2., How are the gears actually constructed?
This as the gear train seen in a similar looking product was compressed metal powder
"coated" and with gear top hats being a simple press fit.
Similar to the photos in Review: Corona DS 538MG servo.

Alan T.

what a junk test... why don't you try them in load ?
looking foward your 55% scale pitts with those servos....

Hey Roger,
What spline do they use for the servo arm?

I think it would be best to test under load before you can state that the centering is good.....while tests can yield good initial results longevity is another thing all together.

Had to many bad experiences with different brand servo's to be ready to conquer to any test that does not involve some vigorous flight testing.

Good Luck!

wow a lot of negative out there . oh well so be it...

centering does not need a load to see if it is precise,

The ones I have tested both are of 20 kg or if you wish 277 oz inch

I have one right now working continuously with a load for longevity

Originally Posted by wecoyote

Hey Roger,
What spline do they use for the servo arm?

The spline as with many is Futaba.

Originally Posted by N726AC

Cool Roger, any torque specs? Also a question, when servo manufactures say titanium gears, do the mean actually machined from titanium or titanium nitride coated?

Like all other manufacturers with TG gears, I don't know I am only the messanger when it comes to specs.

Originally Posted by 2walla

Instead of a pic of some pretty gears lets see the quality of soldering on the board and motor as well as the stress reliefs on the leads where they attach to the board.

That is a good idea, let me see what I can do.

But as you know today all electronics is robotically done

on this picture, I simply removed the back cover , as you can see, to look under the board, I would have to take the servo completely apart since the motor is soldered directly to the pcb. and I am not prepared to do this.. maybe the manufacturer will do it...

Well, at least you have some fun making a logo.

Originally Posted by N726AC

Well, at least you have some fun making a logo.

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http://www.urbandictionary.com/define.php?term=OMG