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Hitec Optic Throttle Channel Settings for ESC

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Tony Smith 729/06/2010 19:44:21
812 forum posts
28 photos
Hi,
 
I'm having some difficulty getting proper motor control with an unbranded ESC, it responds but only goes from about 50% power up to full power.   The ESC works OK with the radio gear supplied with the plane, but not properly on any other receiver as far as I can see.     Can anyone suggest suitable starting settings for EPA and subtrim on the Optic, settings least likely to confuse a crude ESC?
 
I've tried +/-100% and +/-125%, with no apparent difference.   Should I try asymetrical settings, or us sub trim or something?
 
Thanks, Tony S
Bruce Richards29/06/2010 21:41:35
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1849 forum posts
Try this:
 
Set all trims to 0.
 
turn on TX and put throttle to max.
plug in flight battery making sure model is restrained in case it goes to fill power.  It should just beep at you to tell you it has gone to set up mode.
 
then close throttle.
 
ESC should then arm and throttle should control motor speed as it should.
 
Let us know how it goes.
Tony Smith 717/07/2010 20:52:35
812 forum posts
28 photos
Hi, only just got around to another proper try.  My ESC never beeps, but I went through the exact sequence you set out.   The ESC has an arm button, and if I press that at any time during the sequence the motor immediately starts which suggests to me that its not doing any form of setup.
 
By setting EPA to +/-125 and subtrim to -50 I can just get  the motor to stop, but its still making a whining whistle, so I think there's still power being applied.

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