Undergroundxmods.com X2 Lightspeed Pro Edition = ownage

viperdout · Post by **viperdout** » Sun Oct 30, 2005 9:25 am

Cheesehead wrote:Would'nt the HS55 electronics not be happy under the current drain produced by the MZM's larger motor in the servo? I would go with a HS322 (a bigger HS55) instead for that reason.

No idea, was just throwing the servo electronics idea out there.

pimpsmurf · Post by **pimpsmurf** » Sun Oct 30, 2005 12:49 pm

I don't know.

Perhaps a larger servo's electronics are the answer. I don't have a problem using my old JR Servo from my XXX-nt if that would be the ticket. I don't know if it will really fit the bill though.

I'm assuming just about any analog servo electronics would work. right? I mean, they all need a sensor and a motor, no?

-JNY

Tuner1989 · Post by **Tuner1989** » Sun Oct 30, 2005 8:14 pm

So your upgrading to brushless, i take it you wont need that plasmatomic.

Cheesehead · Post by **Cheesehead** » Sun Oct 30, 2005 10:56 pm

pimpsmurf wrote:I don't know.

Perhaps a larger servo's electronics are the answer. I don't have a problem using my old JR Servo from my XXX-nt if that would be the ticket. I don't know if it will really fit the bill though.

I'm assuming just about any analog servo electronics would work. right? I mean, they all need a sensor and a motor, no?

-JNY

Yes and no. You see, most analog servos have vastly different potentiometers, which results in vastly different centerpoint resistances and curves. For example, a 10k resistor must be wired in paralell with the ZZSE servo pot to make it work, and even then it requires some tweaking.
Also, servos have H-bridges to control the motor. A big motor would likely fry the FETs on a small servo. Considering that a full-size (HS322) servo's electronics are no more than 1.5 cm x 4 cm, size is hardly a problem, and "standard" sized servos can be had for 10$ or so.

EDIT: 4x NiMHD cells (4.8 volts) would very likely be shooting yourself in the foot. A 2-cell LiPoly pack would function far better, and 6 NiMHD would likely make for a happier Mamba. (I've yet to hear of anyone using them on less than 7.2 volts.)

Tuner1989 · Post by **Tuner1989** » Mon Oct 31, 2005 6:26 am

I and im pretty sure viperdout, would reccomend kokam's 740's 2cell or 3cell they have around a 15 amp rate continious!

Cheesehead · Post by **Cheesehead** » Mon Oct 31, 2005 4:23 pm

20C is as good as it gets, and let me tell you, it's hard to go wrong with Kokam. They make good stuff.
E-Tec is good too. They can't take more than 10C though; on the other hand, they're much cheaper.
Remember, LiPo's do NOT like going below 3 volts per cell, so a 2-cell pack would likely be damaged if it went below 6 volts.