R/C Tech Forums - Digital Servos from China

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Quote:

Originally Posted by Roelof (Post 15780935)

Yesterday I drove my new car with a HDKJ DS3020
HDKJ DS3020 20kg metal gear, large angle, large torque, digital, waterproof steering gear, All meta - ????????
!

Arent that the ones which are all over Aliex/amazon/ebay ??

This model is not that wide available but yes: https://nl.aliexpress.com/item/32576425514.html
I had them at Dealextreme.

From all those cheap high specs servo's you do see now in the Chinese shops and also on Amazon I have not seen any brushless models.

The AGF A80BHSW servos in my nitro buggy are still going strong after a race day last Friday and a long day of practice on Sunday.

Quote:

Originally Posted by frewster (Post 15784391)

The AGF A80BHSW servos in my nitro buggy are still going strong after a race day last Friday and a long day of practice on Sunday.

How many hours now? pretty awesome though.

Quote:

Originally Posted by themountain (Post 15784437)

How many hours now? pretty awesome though.

I'd say I have 2-3 gallons on this engine so maybe 10-12 hours of actually driving.

Another race day with no failures of the A80BHSW servos in my nitro buggy. I was able to finish 3rd in my main.

Quote:

Originally Posted by frewster (Post 15785287)

Another race day with no failures of the A80BHSW servos in my nitro buggy. I was able to finish 3rd in my main.

Great news! And congratulations on making it to the podium!

*** UPDATE from my previous post below:

CT1 is essentially a heavily upgraded AGFrc A80BHMW

Originally installed the CT1 in a TEKNO EB48 2.0 and logged 12 race days without issue.

Sold the buggy and moved the servo into a HB Racing E8T evo3 truggy.

After 5 race days in the truggy I snapped the pin as mentioned below. While the replacement pin (with softer, more flexible metal) has held up fine for another 5+ race days, I'm now at the 22+ race day count with the CT1 and I'm starting to experience excessive slop:

Since I have several replacement gear sets, thanks to all the AGFrc branded servos that failed on me.. I will go ahead and install a fresh set of gears and see how many more race days I can get before the pin snaps again.

Normally I'd ditch the brand and go with the SRT servo that I already bought to replace this one, but I'm just curious at this point to see if the softer/flexible metal pin I installed will last longer than 15 race days or not.

In the mean time, I've already been running the following SRT servo in my new eBuggy and it's every bit as smooth and fast as the CT1:
https://dialedhobbies.com/srt-bh9032...s-servo-detail

Quote:

Originally Posted by billdelong (Post 15775739)

CT1 update:

After 17+ race days the pin in the CT1 eventually snapped... not really surprised because that's about the only thing that hasn't been upgraded yet. I spoke with NitroPro and they are testing softer (more flexible) pins that should handle a little flex and be less likely to snap.

https://live.staticflickr.com/65535/...a9987335_b.jpg

Although I could've sent the servo in for a free warranty replacement pin, I opted to make a quick repair myself and figured I would start my own testing by using a body clip which is the exact same 1.6mm diameter I need, and I believe these body clips are about as soft of a metal as I can get in this diameter :)

https://live.staticflickr.com/65535/...217c5257_b.jpg

I've got 4+ race days with the repaired servo installed in my recently built E8T evo3:

https://www.rcgroups.com/forums/show...0#post46791599

I have already bought an SRT 9032 servo to replace the CT1 when the pin snaps again... only question is will it go longer than 15 race days with the softer metal???

Good news is that a snapped pin has never caused a DNF, but I make it a point to check for a locked servo after every race just to be sure as the symptom for a snapped pin. If you continue to use the servo after the pin has snapped, then you risk bending the shaft of the servo motor which could make the servo un-repairable... been there, done that with an AGFrc servo already :(

Bill inspired me to check the slop on my servos. The Blue Bird in my ebuggy should have about the same amount of time on it, maybe 10ish hours as the AGFs in my nitro buggy.

As you can see, the Blue Bird has hardly any slop while the AGF has a similar amount to Bill's. It obviously hasn't hurt how the car drives, but time will tell if the gears end up failing altogether. I've got some new Blue Birds which should get here in about a month that I'm eager to try out.

Blue Bird servos are amazing, my choice for nitro racing for years now.

Anyone have experience with jx servo csl6322hv 21kg?
They are rated at 0.07 60° on 7.4v
around 40$ on amazon.
I've watched couple of videos and they look hella fast.

Quote:

Originally Posted by bratan (Post 15787028)

Anyone have experience with jx servo csl6322hv 21kg?
They are rated at 0.07 60° on 7.4v
around 40$ on amazon.
I've watched couple of videos and they look hella fast.

I have experience with the JX HV7232MG which has many variants based on this design and I've tested a total of 6 different versions of JX servos though not the specific model you referenced. While JX offers a great value, you sorta get what you pay for in that their gears will get sloppy over time and eventually strip. I feel their gears are comparable in longevity with AGFrc gear sets where neither brand has stood the test of time for me and I've moved on to better quality products. If you plan to go with JX, be sure to keep a spare set of gears handy!

Don't think I've chimed in on this thread before but just wanted to share my experience as I currently am running 3 AGFrc 36kg A80 servos.

1. EB48 2.0 with a Reefs 400 SC (AGFrc) / 106 pack count
2. EB48 2.0 with an AGFrc branded 36kg / 45 pack count
3. Arrma Notorious with an AGFrc 36kg / no pack count but it's 3 months old and bashed a few times a week.

I have a 4th on standby for a ET48 2.0 build. I figure if it can stand up to the extreme abuse of a 12lb basher it should handle a truggy with no issues.

https://cimg0.ibsrv.net/gimg/www.rct...f955b6f84c.jpg

Quote:

Originally Posted by billdelong (Post 15787075)

Tnx for quick reply, I will throw dices and see how they perform. Will let you fellas know if they are any good.

Quote:

Originally Posted by Furadi (Post 15787078)

How's the slop in the gears? Bill and I checked ours in the last page or two and you can see there's quite a lot.