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BrianG · 02.17.2009, 01:52 AM

^^ +1. As far as I'm concerned, true cogging is very undesirable because the motor is somewhat stalled and very large currents are possible.

However, the MMM with firmware 1.20 does what looks like cogging, but is really more like "chattering". The main difference is that there isn't that huge surge of ESC/battery killing current. If the gearing is too high where a low throttle input does not allow the ESC to get a proper back-EMF reading from the motor, the ESC seems to try to go, but backs off before things start to get bad. This repeats quickly and sounds like cogging.

The two ways I can think of to reduce or even eliminate this would be to gear down and/or increase the ESC "start power".

	(#3)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	02.17.2009, 01:52 AM ^^ +1. As far as I'm concerned, true cogging is very undesirable because the motor is somewhat stalled and very large currents are possible. However, the MMM with firmware 1.20 does what looks like cogging, but is really more like "chattering". The main difference is that there isn't that huge surge of ESC/battery killing current. If the gearing is too high where a low throttle input does not allow the ESC to get a proper back-EMF reading from the motor, the ESC seems to try to go, but backs off before things start to get bad. This repeats quickly and sounds like cogging. The two ways I can think of to reduce or even eliminate this would be to gear down and/or increase the ESC "start power".