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Old 10-24-2015, 02:10 PM   #1
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Brushed motor/ESC issue


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HI, I converted a plane that had a brushed ESC/receiver single unit. (Litehawk swift). I want to use my own ESC and receiver. I installed a 30a Turnigy brushed ESC. Issue I have is as soon as I powerup the ESC, motors spins up! even if the esc is not hooked up to the receiver!

Faulty ESC or I am faulty? !!!
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Old 10-24-2015, 04:24 PM   #2
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Re: Brushed motor/ESC issue

What do the esc instructions say as far as operation ? Didn't know that anyone made brushed ESC's any more as with the advent of brushless motors everyone has gone that route with more built in safety features.
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Old 10-24-2015, 04:33 PM   #3
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Re: Brushed motor/ESC issue

Yes brushed ESC exist!!!

It says to plug 2 wires to motor, other 2 wires to battery, and then lead to receiver. Like a brushless, but only 2 motor wires.
Instructions does not report my bug!!
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Old 10-24-2015, 05:12 PM   #4
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Re: Brushed motor/ESC issue

You should ALWAYS have the Tx on first, then only power it with it plugged into a compatible receiver.

A great majority need to see a low throttle signal when powered up to arm.

Let us know if it works correctly following that procedure.

NOTE: You should always unplug the flight battery before turning off the TX, as well.
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Old 10-24-2015, 08:54 PM   #5
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Re: Brushed motor/ESC issue

Hi, I always follow this procedure. If motor is unplugged, all works fine for the servo's. But as soon motor is plugged, it runs. Tried to trim down throttle, no change. Throttle cut dors not work. But only ESC, batt and motor, motor runs itself even if esc is not plugged into receiver. Don't think this is normal.
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Old 10-24-2015, 10:17 PM   #6
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Re: Brushed motor/ESC issue

One more thing to check, but since we don't know the radio system this is a guess.

Ensure your throttle channel has the travel limits set to 100% each way. Also, if Futaba you have to set that channel to REV direction.

If that does not work sounds like you have a faulty ESC. I may have a brushed ESC in spares you can try, but believe it would be less than 30A.
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Old 10-24-2015, 11:24 PM   #7
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Re: Brushed motor/ESC issue

Hi, it is a Spektrum DX8.
Also tried reverse, same thing. Limits are at 100%.

Think the ESC is faulty
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Old 10-25-2015, 07:37 AM   #8
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Re: Brushed motor/ESC issue

That sucks. Trying to get warranty from HK is problematic, at best.

Regardless, in the future do not power the ESC without a receiver.
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Old 10-25-2015, 09:02 AM   #9
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Re: Brushed motor/ESC issue

I take it, the plane was bound with the ESC plugged in and throttle off. What you are doing essentially, is programming the ESC to shut the motor off when there is no signal.
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Old 10-25-2015, 10:52 AM   #10
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Re: Brushed motor/ESC issue

Cougar: Yeah I usually never plug the ESC alone without receiver. I tried it afterwards.
Yeah warranty sucks specially when you had item on shelf for 1 year!!!!!!!!

Flypaper: If I understand what you mean, not exactly. I just want the ESC to behave normally. Motors is always on regardless is throttle is down or up, inverted or normal. So pretty sure it is faulty ESC.
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