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BrianG · 06.06.2006, 01:25 AM

I didn't catch if you were running it fine for a while and it just starting doing this, or if it was doing it from the start?

I don't know what a 7 turn high-amp motor will pull for current, but maybe the 9920 just isn't up to the task? I know I've seen over 100A bursts from my BK Wanderer 8XL when I punch it from a standstill. Or if it's not that, maybe the ESC was overheated quite a bit burning out a few FETs and now is running on fewer FETs? I don't know of any type of current limiting capability in these ESC, but that's exactly what it sounds like.

One way to tell a bad connection would be heat. A bad connection creates a voltage drop, which in turn dissipates power as heat when high current flows. Wire and connectors should not be warm at all to the touch, or VERY little.

As far as direct soldering goes; it will be a better connection providing it is done correctly (no cold solder joints), but less convenient than connectors if you need to replace something. Just make sure the connectors are soldered well and they fit snugly together. The 5.5mm ones Mike has are quite beefy.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	06.06.2006, 01:25 AM I didn't catch if you were running it fine for a while and it just starting doing this, or if it was doing it from the start? I don't know what a 7 turn high-amp motor will pull for current, but maybe the 9920 just isn't up to the task? I know I've seen over 100A bursts from my BK Wanderer 8XL when I punch it from a standstill. Or if it's not that, maybe the ESC was overheated quite a bit burning out a few FETs and now is running on fewer FETs? I don't know of any type of current limiting capability in these ESC, but that's exactly what it sounds like. One way to tell a bad connection would be heat. A bad connection creates a voltage drop, which in turn dissipates power as heat when high current flows. Wire and connectors should not be warm at all to the touch, or VERY little. As far as direct soldering goes; it will be a better connection providing it is done correctly (no cold solder joints), but less convenient than connectors if you need to replace something. Just make sure the connectors are soldered well and they fit snugly together. The 5.5mm ones Mike has are quite beefy.