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HOBBYWING TECH SUPPORT 1/8 & 1/10 OFF ROAD

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HOBBYWING TECH SUPPORT 1/8 & 1/10 OFF ROAD

Old 08-20-2012, 04:56 PM
  #856  
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Originally Posted by M7H
And did you try it with throttle in Normal mode?

Why a BEC?
not yet. THe bec because de Xerun outputs 5,75 V and I need a clean 6V for my Spektrum receiver. On top of that I know my Savox draws even more current then my Hightech that already draws more then 4V at full lock. So chances are the internal 3V continuous of the Xerun will be only just coping with the demand.
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Old 08-21-2012, 12:44 AM
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"A" you mean, from Amps.
I never test my servo's at full lock, don't understand why you would....
Try calibrating without the BEC (you don't need it for that purpose)
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Old 08-21-2012, 12:44 AM
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double....
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Old 08-21-2012, 09:36 AM
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Originally Posted by M7H
And did you try it with throttle in Normal mode?

Why a BEC?

(Hollanders op een buitenlands forum, hahaha)
I will be using an external BEC myself from now on just as a safe guard. My last HW ESC had a bad BEC after only a couple of months. It doesn't hurt to run one so why not?
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Old 08-21-2012, 10:33 AM
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Originally Posted by midwestcajun
I will be using an external BEC myself from now on just as a safe guard. My last HW ESC had a bad BEC after only a couple of months. It doesn't hurt to run one so why not?
If you can rig up a plug so that you can get 8.4 volts to your radio of the battery balence plug I'd do that. (for 4S systems)

For 2S I'd just cut the red ESC servo wire and pull 8.4 volts straight from my Deans plug.

Most car voltage regulators are really weak and glitch prone. And better airplane regulators are big and heavy.
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Old 08-21-2012, 03:25 PM
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I use the 120a V2.1 in my 1/10 Durango cars and both esc`s have a tendency to go back to default settings..
Today it happened in my 210. Suddenly I had no reverse and the esc started to blink and make "programming" sounds..
Do anyone know what causes this ?
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Old 08-22-2012, 06:30 AM
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Hey guys

I was wondering how the SCT-pro reacts with an external 7.4V power-supply (either straight lipo or 7.4V BEC, yes, it exists). I run my former HV servos from my nitro rig, my RX is HV compatible (same as before) and I really think I could use the extra torque/speed from bitd.

Has anyone powered a rx with 7.4V and shunted the red wire from the SCT? How does the SCT like 7.4V signals, risky or not?

Thanks,
Paul
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Old 08-22-2012, 09:48 AM
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Does anyone know the bearing sizes for the 4000kv (3656 Bloack) motor? I toasted the front last night after about 2 mos of hard racing/practicing. I'm a noob to racing and just last Sunday I asked someone more experienced how often the can should be cleaned. His response was maybe once a season, you should be fine for another month. Lesson learned the hard way, I knew it was time to clean but wanted confirmation. Thanks in advance.

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Old 08-22-2012, 10:10 AM
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Originally Posted by Zerodefect
If you can rig up a plug so that you can get 8.4 volts to your radio of the battery balence plug I'd do that. (for 4S systems)

For 2S I'd just cut the red ESC servo wire and pull 8.4 volts straight from my Deans plug.

Most car voltage regulators are really weak and glitch prone. And better airplane regulators are big and heavy.
Some RX's don't like 8.4v input. Make sure you know your RX specs before trying this.

Agreed on most of the external car BEC's being pretty crappy. Castle makes a $20 "airplane" one though that is powerful (10 amps) and reliable. I personally run the Castle one in 1/8th scale and 4wd SC. A lot of people do and have had good success. It is good peace of mind over the internal BEC of the ESC (no matter the brand). Also, with the Castle BEC you can bump up the voltage to make the servos faster. Can not do that with most ESC BEC's.
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Old 08-22-2012, 12:18 PM
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Originally Posted by kcobra
Some RX's don't like 8.4v input. Make sure you know your RX specs before trying this.

Agreed on most of the external car BEC's being pretty crappy. Castle makes a $20 "airplane" one though that is powerful (10 amps) and reliable. I personally run the Castle one in 1/8th scale and 4wd SC. A lot of people do and have had good success. It is good peace of mind over the internal BEC of the ESC (no matter the brand). Also, with the Castle BEC you can bump up the voltage to make the servos faster. Can not do that with most ESC BEC's.
just what i was asking about... do you have any experience doing this with hw speedos?

thanks!
Paul
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Old 08-22-2012, 02:11 PM
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Originally Posted by Lonestar
just what i was asking about... do you have any experience doing this with hw speedos?

thanks!
Paul
Sure. I run a Castle 10 amp BEC on both the Xerun 150 amp 1/8th scale ESC (running 6s) and the SCT-Pro in my 4wd SC. I bump the output voltage up on the BEC to ~7.2v in order to increase my servo speed.
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Old 08-22-2012, 04:23 PM
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I haven't had any problems running the 80 amp esc in my electric 1/8th scale buggy. I am doing this with just the use of a plug-in capacitor. I have noticed though that some of the smaller escs can have issues sustaining a constant voltage and supplying that to the receiver.
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Old 08-22-2012, 05:50 PM
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Originally Posted by M7H
"A" you mean, from Amps.
I never test my servo's at full lock, don't understand why you would....
Try calibrating without the BEC (you don't need it for that purpose)
Yes 3Ampere. Most strong heavy duty servos draw more then that. That's why I use the Castle 10A BEC like some other people here. Works like a charm now.
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Old 08-22-2012, 10:39 PM
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Originally Posted by kcobra
Sure. I run a Castle 10 amp BEC on both the Xerun 150 amp 1/8th scale ESC (running 6s) and the SCT-Pro in my 4wd SC. I bump the output voltage up on the BEC to ~7.2v in order to increase my servo speed.
just what i was after ! thnaks

Paul
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Old 08-25-2012, 06:38 AM
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Is it possible to buy just the plastic case from a V2.1 ESC? I broke one removing it from my truck yesterday (wow was is good servo tape) and want to replace it.
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