Granite Arrma Granite 3s blx steering stopped working
- Thread starter MWALL
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Kla912000
Very Active Member
Razor is right. You really don't need a new ESC. I gave you the correct info so you understood the difference between the two servos. But, 26kg is a LOT of power and you probably wouldn't even notice the difference between the 2 servos. Also, if you are jumping and bashing your Granite, the aluminium servo horn might not be the best option. If you crash hard, the servo might be able to handle it without much damage but you will probably end up breaking other steering or suspension parts. That's the purpose of the servo saver. To soak up the force from a crash and save other, more expensive parts.Yes. New JX servo goes with 25t so old stock 23T servo saver is not gonna fit anyways, and yes I have now aluminium servo horn in it, so something done right?
Kla912000
Very Active Member
razorrc
Very Active Member
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Yes. New JX servo goes with 25t so old stock 23T servo saver is not gonna fit anyways, and yes I have now aluminium servo horn in it, so something done right?
Uh no, you need a servo saver. Either the Arrma one, or the stiffer Kimbrough one.
I didn't even think about that, ha, yes, just update your firmware and you get 7.4V for free! Though you will have to spend $30 on the programming card.
Probably worth it to have the programming card anyway if you plan on buying more Arrmas.
Great info!! Sweet
Do u care to explain what 7.4v helps or hurts. Is it just more power being given to whats taking it? Sry I just don't knowUh no, you need a servo saver. Either the Arrma one, or the stiffer Kimbrough one.
I didn't even think about that, ha, yes, just update your firmware and you get 7.4V for free! Though you will have to spend $30 on the programming card.
Sry I'll watch video first. Duh. My bad. U prob explain in it
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Kla912000
Very Active Member
The BEC(battery eliminator circut) runs your servo and fans. An adjustable BEC allows you to use a HV servo. At 7.4v your servo will have more torque and speed. And your fans will spin faster. Of course you have to be sure that your servo and fans can handle the higher voltage. The stock Spektrum S651 servo is not a high voltage servo so you cannot run it on 7.4v. Stock servo must stay on 6v.
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Kla912000
Very Active Member
No it does not run on 7.4v. Look at the specs that you posted. It has a maximum of 7.2v and while .2v is not much, running the S651 on 7.4v for a prolonged time will burn out the servo which isn't even that good of a servo to begin with. That's why people are always replacing them. They are junk RTR servos that fail at a high rate. I sure wouldn't run them at a higher voltage than they are meant to run.
Their own description is misleading too then.
Also, only the 6S and plus cars run on 7.4v BEC voltage out of the box. 3S line needs to upgrade ESC firmware to be able to change the bec to 7.4v, so while they break their servos, I think thats because a car of the size of Vorteks/Granite/Big Rock, needs better servo that one which pulls ~6kg.
Its super interesting tho, because the Spektrum S652, their next one and which is used in bigger Arrma cars, that actually also run potentially on 7.4v BEC by default (lazy to check manuals right now) is also advertised as 7.2v input voltage. So those might be breaking on those bigger cars too.
Kla912000
Very Active Member
The S652 does fail in the heavier 6s rigs. Not as much as the S651 in the 3s rigs, but it does fail and as a RTR servo it also needs upgraded. But, people have great luck running the S652 in the lighter 3s rigs.
