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Old Aug 05, 2011, 04:30 PM
Team30 Micro EDF
MegaTesla's Avatar
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Oh, I thought you opened it up already. Post them when you've got some of the inside. I'm really curious to know what is going on inside...
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Old Aug 05, 2011, 05:09 PM
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Here are some crude pics of one of my servos partly taken apart (as far as I dared), and one pic showing the apart one next to a complete one and a ruler. The wires from the pot and motor to the driver board look about as hefty as the wires leading out of the servo (not superlight weight enamel magnet wire like some small servos have used).

The gears are REALLY small, but it seems very smooth and precise.

Looks like it uses a 4mm motor and a potentiometer (near as I could tell).

On my scale (only accurate to 0.1g) with an output arm attached (didn't use the accompanying screw, arm feels secure enough without it) it is 1.8gms.

Very smooth motion, fast, no jitter, and VERY quite. I think I'm really going to like these (as long as I remember to put them in small models due to their low torque).

Tim
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Old Aug 05, 2011, 07:18 PM
"Unnecessary Necessity"
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Tim
Can you please confirm what kind of connectors they uses.
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Old Aug 05, 2011, 07:29 PM
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Quote:
Originally Posted by coriolan View Post
Tim
Can you please confirm what kind of connectors they uses.
I know they are NOT AR6400 compatible connectors (slightly too big for the AR6400 socket). Hole spacing looks to be about 1.4mm and the connector width is about 4.2mm.

Beyond that I can't really comment since I only have AR6400 and MicroInvent receivers. I already planned on switching the connectors to fit my MicroInvent so the incompatible connector doesn't bother me.

Tim
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Old Aug 05, 2011, 07:36 PM
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I can check to see I it fits the ar6300, but I highly doubt it. It looks a little small for the 6300.

It sucks that I am not stationary. All of my stuff are split up. Sorry for the delays.
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Old Aug 05, 2011, 07:36 PM
ancora imparo
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Melbourne, Australia
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Looks like they are Molex (Futaba micro) same as the 2.2 g servo. Plug straight into the FlyDream 1g Rx if you use those.

Love the complaint on the HK Forum already.

"Hopefully price will decrease a bit with time."

This for a what must be the smallest conventional servo in the world for $3.77!

How much HK has changed expectations. No wonder all the specialist small manufacturers are going out of business.
Quote:
Originally Posted by Tim Cullip View Post
I know they are NOT AR6400 compatible connectors (slightly too big for the AR6400 socket). Hole spacing looks to be about 1.4mm and the connector width is about 4.2mm.

Beyond that I can't really comment since I only have AR6400 and MicroInvent receivers. I already planned on switching the connectors to fit my MicroInvent so the incompatible connector doesn't bother me.

Tim
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Old Aug 05, 2011, 07:59 PM
"Unnecessary Necessity"
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"Looks like they are Molex (Futaba micro) same as the 2.2 g servo. Plug straight into the FlyDream 1g Rx if you use those."

Thank John, I had that impression too and will get some of these for my Flydream!
boredom.is.me don't forget about the different polarity of AR-6300(mini-jst with negative in center).
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Old Aug 05, 2011, 08:05 PM
Micro Boat Forum Founder
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Oh I wouldn't power it up. They are not intended for flight.
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Old Aug 05, 2011, 08:23 PM
"Unnecessary Necessity"
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Aren't they too light for paper weight
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Old Aug 08, 2011, 03:33 AM
ancora imparo
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Melbourne, Australia
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Impressions of the little orange wonders

Well mine arrived today.

First impressions are pretty good. They are significantly smaller than the HK "2g" or "2.2g" servo. My guess is about half the torque but just as fast and they move through about 100 degrees instead of the 90 of the 2.2g version. Very smooth and quiet with no jitter. Certainly perfectly fine for what they are intended for. Think of them as a sub $4 replacement for the Toki. Very attractive.

Photo shows one of the new 1.7's and the 2.2 plugged into a FlyDream 1g Rx to give you an idea of the size.

Both these small servos have identical leads. 4.5"/10.5cm with Molex connectors that fit FlyDream, Futaba micro and Walkera but not the Spektrum AR6300 or 6400.

The case is held together with a screw unlike the 2.2g which just falls apart if there is no sticky tape on it.

Actual weights of these two samples ready to install with a cross arm and retaining screw are 1.98g and 2.64g respectively.
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Old Aug 08, 2011, 03:41 AM
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You got there before me.

I can also confirm that it uses a 4x8mm motor. The gearing is just like any other servo, many gears. The servo horns are also in their own size class. They are much smaller than other micro horns.


Regarding the larger servo, mine is orange and marked "HKM-282". I don't have my scale so I can not get an actual weight. I wonder if it is the same as the older one (the black one pictured above).
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Old Aug 08, 2011, 04:03 AM
ancora imparo
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Think they are identical. HK must have got a bulk price on Orange moulding material.

The black ones came in a packet marked HKM-282. I suspect these bigger ones at least are made by PZ. They look very like some I got from them.

Meant to mention my testing was done on a single LiPo. These little servos are pretty zippy on one cell.

John
Quote:
Originally Posted by boredom.is.me View Post
Regarding the larger servo, mine is orange and marked "HKM-282". I don't have my scale so I can not get an actual weight. I wonder if it is the same as the older one (the black one pictured above).
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Old Aug 08, 2011, 04:06 AM
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This orange must be from the throw away sale. I wouldn't mind some transparent or translucent red servos. That would be cool.
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Old Aug 11, 2011, 03:06 AM
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The supermicro line is what is ar6400 plug compatible, not these. I knew I saw "compatible with ar6400" somewhere.
http://www.hobbyking.com/hobbyking/s...ar_Servo_.html
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Old Aug 11, 2011, 05:24 AM
ancora imparo
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Melbourne, Australia
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And believe it or not, for once HK got their Micro connectors correctly described. The Super-micro servos and the 5Ch Rx are indeed JST-SH that are the ones on the AR6400 and Falcon systems.

Based on experience to date however, as a general rule I wouldn't believe what it says about small connectors on the HK web site till I have seen them in real life.

Anything that looks small and white seems to get called JST.

Just for the record (in order of decreasing size)

1) AR6300 are 1.5mm spacing JST-ZH
2) The HK 1.7 and 2.2g servos are Molex Picoblade 1.25mm spacing. Used on the Micro Futaba and Walkera servos and FlyDream 1g Receiver.
3) AR6400 and HK Super Micro are JST-SH with 1mm spacing

Quote:
Originally Posted by boredom.is.me View Post
The supermicro line is what is ar6400 plug compatible, not these. I knew I saw "compatible with ar6400" somewhere.
http://www.hobbyking.com/hobbyking/s...ar_Servo_.html
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