Anyone know the power consumption on these? I'm having trouble running four of these off a 25-30A ESC with a 3A BEC (at least the specs say 3A), model #HK-SS30A. Receiver is orange R615. 3 servos work fine, four do not...receiver quits when I try to run all four at the same time.
I haven't tried with four of these, but currently I have six HTX900s on my Bixler 2 and it runs with no problems. I don't know exactly what is wrong, but personally I'd try hooking the servos up with either a different ESC or a stand-alone BEC if you have one.
Best of luck!
Still trying to find out the power consumption for these servos before I assume the ESC is rated incorrectly. I have tried the same set up with different ESC's (same model), different RX (same model) and different servos (same model). Same results.
No probs unless moving all four at the same time. Someone else on my post for the 25-30A SS series ESC said these take about 600mA each plus a bit of consumption for the RX. That's getting close to 3A. I'm guessing the ESC is not rated correctly. It probably has a 2A BEC, not 3A as advertised.
Hi Lenny J, Can you provide what type of model you are running these on? If the control surfaces are large enough, or stiff enough, it would cause high consumption issues. All the best and Happy flying!
I was trying this on a Flite Test FT3D that I built. Receiver browning out even with no horns on the servos so it is not a matter of stiff surfaces. I really believe the 3A BEC is not correct on the HK-SS30A (I have 3 of them, same results with all 3). Tried 3 different RX now too. All the ESC's were bought at the same time, maybe a bad batch. Everything works great off a cheap ebay 40A ESC.
I had several of those SS 25-30 ESCs and reflashed them with SimonK. I used 4 of them to power my FC 28-12 1534kv motors on my UFO. They works great in that capacity but didn't have to power anything but the FC and the RX (all powered from the M1 ESC). Glad you got yours to work with another ESC. If you can, reflash those SS ESCs and build youself a tricopter (only one servo).
Thanks for your replies and the cool videos Ron! I'd like to get into reflashing but don't know the first thing about it. If I started a discussion on the ESC page, would you be willing to comment with a few tips for the newbie and I will award credit? Sorry I can't give any credit on this thread!
It's similar but not the exact same as the HXT900, however I think the gears should be interchangable. I checked the current draws on 5v: idle, about 10ma, freely moving full swing or with a little resistance, about 100-200ma, and stalled, 600ma. Also, dunno why they call it a 9g servo- it's right around 12 grams, but that's no problem, should be listed as that. Fairly precise, nothing special. However, if you need a cheap servo, this is the one.
6 comments. Reply..
30 thumbs up!
It looks like the HXT900, has the same size but is a clone of the HXT900. The precision is a little bit lower than the HXT900, but still good enough. I like the longer wires. It seems that this servo is a bargain buy, but we still do not know what they'll do after hundrets of flights. I'll give 5 stars for now.
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21 thumbs up!
This servoe is exactly same as Tower Pro SG90. The plastic case is exactly same, if remove the stickers, you may not be able to point any different. I opened them the electronic circuit board is exactly same as well with same motor same cable with same length. I have replaced the gears and no problem. Even the QC and test stickers inside and out side are same and in the same area. The Tower Pro SG90 is very strong and long life servo.
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12 thumbs up!
Installed in cub, beside the TG9, and this one noticably faster... had to replace the TG9 with another 9e. Not sure if I would put this in a high torque demanding application, but for most planes this is perfect, cheap and fast!
I have used this on a home built rafale eurofighter profile plane made from depron foam. I just noticed comparing it to the HXT900 9g (which I also have), its a tad slower. The specs on this turnigy TG9e does say 0.10 sec while the HXT is .12sec. I bought only 2 of these since this is the cheapest servo I could find at the time of my purchase. I suppose this servo can be an indispensible on or a disposable one depending on how you would use it. For me, it served the purpose as tailerons. Quality wise, it does not look any different with the HXT 900 9g. A millimeter difference based on the tech. specs. and it pulls 1.5kg instead of 1.6kg for the HXT900. If you are looking for a cheap servo, this is it. LHS will offer this at a ridiculous 3 times price. I would like to support my LHS but at the price hobbyking is offering these, makes me think twice. I can order spare parts and even with the shipping costs, it will still be cheaper with hobbyking. They just slam the competition if not all, most of the spare parts/planes/heli on LHS.