Mamba Monster has delay with throttle input

[Pdelcast]

Originally Posted by snellemin

I installed my backup Mamba Monster that I had purchased a while back, but never used until yesterday. I'm am running it on 2s with a B50-5S Hacker motor. kV is about 7400. Batteries are 2s GensAce 5000mah. Gearing 46/13 in the RCM CRT.5 with 3" tires.

Problem is that when I give it throttle there are a few seconds delay for the ESC to ramp up to full speed. I have reflashed the ESC to the latest firmware, just in case and same results. I've even tried the default settings with the same results. I've swapped RX's and same thing. Rebound the ESC to the RX a bunch of times and nothing. My Radio settings are stock as well.

Suggestions anyone? Just send the ESC back?

Hi Snell,

Well, the issue is this:

The controller gives throttle to the motor, the battery voltage drops quickly below 5.8V (cutoff...)
The controller sees the battery voltage drop, and throttles down to protect the battery.
The battery voltage rises again, so the controller throttles up
The battery voltage then drops again,
and so on...

until the speed rises enough that the controller can give throttle without the battery voltage dropping significantly.

Usually caused by:

Insufficient battery
and
mismatched pinion

We see this a LOT -- and the issue is easy enough to fix.

Thanx!

Patrick