|LHR Dave||23/02/2019 20:34:25|
114 forum posts
I have a problem with two brand new esc,s. They are both from Hobbyking and are rated at 60A. Both of these esc,s are doing exactly the same thing.
Once powered up to a fully charged 3s lipo they bleep 3 times to indicate the number of cells on the battery and then nothing.
If I then switch off the transmitter the esc then continues with its start up tones and then the motor starts and will speed up with throttle movement on the tx. The motor will not stop until the tx is switched off.
The receiver has been used before on other models and is fully servicable , I have been flying for many years and have been using electric flight nearly as long . I have never come across this problem before. Am I doing something wrong or do I have two brand new knackered esc,s.?
Your thoughts please?
|Denis Watkins||23/02/2019 20:49:46|
|4057 forum posts|
Teach the ESC high and low throttle Dave **LINK**
Edited By Denis Watkins on 23/02/2019 20:56:03
|Martin Harris||23/02/2019 23:03:36|
9084 forum posts
I can't quite follow this - you seem to have switched the transmitter off, the ESC arms and the motor runs but you say the motor runs until the transmitter is turned off - when did you switch it back on?
If Denis's suggestion hasn't cured your problem, could your throttle be reversed from the direction the ESC expects to see? What transmitter are you using?
If this is the case, then perhaps your failsafe setting is actually giving full throttle to the ESC.
|Percy Verance||24/02/2019 07:42:33|
8108 forum posts
I don't understand why the transmitter should be switched off during the initial set-up process? It certainly isn't how I've always done it.....
Futaba transmitters ought to have their throttle channel reversed, although the op hasn't said whether he's using a Fut tx......
As mentioned earlier, a new esc needs to *learn* where the extremes of throttle travel are, and this ought to be set at 100% otherwise that causes further problems.
Edited By Percy Verance on 24/02/2019 07:47:21
405 forum posts
Use the servo monitor screen on your transmitter and/or plug a servo into the throttle channel of the receiver in order to check whether the ESC is getting the instructions you think it is.
|LHR Dave||24/02/2019 15:44:10|
114 forum posts
The reason I switched off the tx was because nothing happened other than the three bleeds to indicate the cells. So just to see I switched the tax off then on and then the esc completed its start up tones then the motor ran. But it would not stop even with low throttle, the only way of stopping the motor was to disconnect the battery. I will now try other sequences to try and get it to arm properly. I must say every other esc I have had I have had no bother at all.
|Piers Bowlan||24/02/2019 16:01:31|
1993 forum posts
It certainly sounds like the throttle channel is reversed. The ESC will beep when the battery is connected but then nothing will happen. Although the throttle is closed if the channel is reversed the ESC will 'see full throttle' which it won't do until the throttle stick is moved full travel - which will arm the ESC. Then 'closing' the throttle will apply full throttle until the battery is disconnected. I agree with Martin, I think failsafe is commanding full throttle instead of off when the radio is switched off.
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