Hi all,
I have a Rustler XL-5 with an Ezrun 60a ESC, 8.5t motor and normally use a fully charged 5000mah 2S 20C lipo. The truggy has run flawlessly on this set up.
On Sunday I was out in the park bashing around. The gearing was to high, 23/90, as I could not find my 19t pinion. Anyhow, everything was fine for a while. I kept an eye on the motor temp by applying the how long touch test and was not overly concerned. Never checked the ESC temp but over heat protection was enabled
After about 15mins of full throttle and walking pace throttle the truggy started cogging. It has never done it before. I installed another fully charged battery and it continued to cog.. Whilst changing the battery I noticed that the ESC was no longer taped down. It had obviously been bashed about a bit. Anyway, playtime was over.
Later that evening I removed the transmission cover, in the hope that the pinion may be lose or spinning on the spindle. All was OK. Tried to spin the wheels but it still cogged. Loosened the pinion from the spur and eventually the motor spun up. I then changed some of the ESC settings noting, or hoping, that the on/off switch was being temperamental as the ESC would not always switch on. No change. Still cogging. Hooked up a 13.5t to the ESC and that cogged. Tried the 8.5t on another ESC and it spins up. So I think the motor is OK and the ESC is the problem.
So I am about to pull the trigger on another ESC but before I do so would like to know:
Why and how is the ESC is cogging the motor?
Could it be due to moisture ingress as the grass was very wet?
If there any check I could do other than measuring the resistance between the ESC wires?
Thanks in advance