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Old 07-21-2011, 08:41 PM   #1
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Default EZrun 35a esc HELP

I recently received my EZrun 35amp esc for my HPI Sprint and it seems to be having issues. I took video of it so please check it out and let me know what you think. When I touch the esc it is hot. Please help! Do I need to return this or did I do something wrong? I HAVE worked with EZrun before and am pretty sure I hooked this up right but who knows. Thanks!

http://youtu.be/3FnWgHYTNGM
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EZrun 35a esc HELP-2011-07-21-18.44.19.jpg  
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Old 07-22-2011, 12:09 AM   #2
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What is the wind of the motor? If you a 5.5t on a 35A esc it sure can get hot. 35A is more for 17.5T
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Old 07-22-2011, 12:14 AM   #3
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I see a couple of issues:

1. Running a Brushless Motor with no load (not good, they should only ever be run when under load ie in the car), looks to be 3600kv and 540 size (not ripped can 380 rotor) so I'd say amp draw exceeds 35A.

2. Nimh battery ?!?
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Old 07-22-2011, 03:59 AM   #4
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Quote:
Originally Posted by nexxus View Post
I see a couple of issues:

1. Running a Brushless Motor with no load (not good, they should only ever be run when under load ie in the car), looks to be 3600kv and 540 size (not ripped can 380 rotor) so I'd say amp draw exceeds 35A.

2. Nimh battery ?!?
It's a 3500kv, not sure on the turn in the motor. I realize that running the motor free is unhealthy but the reason I took it out was because of the cogging I noticed while it was hooked up to the car.
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Old 07-22-2011, 04:28 AM   #5
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I'd say it's cogging because the Nimh battery can't handle the amp load it wants. A 3600kv 540 sized motor is roughly a 10 turn, the ribbed endbell motors that have the 380 rotor are fine on the 35A up to a 9 turn, but yours is a 540 rotor so would really need the 60A Ezrun, I wouldn't go past 17.5 turn on the 35A if using 540 sized rotor motors.

Even my SC10 which has a geared down 17.5 for my nephew to run has a 60A in there.
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Old 07-22-2011, 10:57 AM   #6
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Quote:
Originally Posted by nexxus View Post
I'd say it's cogging because the Nimh battery can't handle the amp load it wants. A 3600kv 540 sized motor is roughly a 10 turn, the ribbed endbell motors that have the 380 rotor are fine on the 35A up to a 9 turn, but yours is a 540 rotor so would really need the 60A Ezrun, I wouldn't go past 17.5 turn on the 35A if using 540 sized rotor motors.

Even my SC10 which has a geared down 17.5 for my nephew to run has a 60A in there.
I'm using that battery just for the testing to make sure everything worked and was spinning the right way. I did try a freshly charged 2s lipo also with the same results.
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Old 07-22-2011, 07:11 PM   #7
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It could be a fake. The fan sticker doesnt look like that on genuine EZ-Runs

The fakes DO sometimes have issues with cogging/reverse failing etc.
Try the Ezrun thread
http://www.rctech.net/forum/electric...ss-system.html
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Old 07-22-2011, 07:27 PM   #8
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Quote:
Originally Posted by 1101 View Post
It could be a fake. The fan sticker doesnt look like that on genuine EZ-Runs

The fakes DO sometimes have issues with cogging/reverse failing etc.
Try the Ezrun thread
http://www.rctech.net/forum/electric...ss-system.html
Sending it back Monday!
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