[NSRCA-discussion] Hacker ESC programming

[Fred Huber]

Intuitively (not having dealt with that ESC, or any other wioth the ability to play with timing like that one allows)

Ideal timing will change with prop load and voltage.... just as ideal timing in a brushed motor for RC cars will vary based on the weight of the car, gearing and tires used.

In the RC car cas... they adjust the motor, rotating the brushes in relation to the magnets.

In the case of the brushless... the application of power to windings is altered by changing the timing electronicly.

So... any recommended timing will actually be a STARTING PONT and you should CAREFULLY experiment with variations... using a wattmeter and tachometer.  Most efficient setting will give the highest RPM/watt.
  ----- Original Message ----- 
  From: Stuart Chale 
  To: 'NSRCA Mailing List' 
  Sent: Friday, August 03, 2007 7:02 AM
  Subject: Re: [NSRCA-discussion] Hacker ESC programming


  Thanks Verne and Earl.  I was wondering if there was a sig difference between settings.  Funny as I switched to log setting on the comp motor but never felt I had to on the standard version.  

  Thanks

  Stuart

   


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  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Earl Haury
  Sent: Friday, August 03, 2007 7:12 AM
  To: NSRCA Mailing List
  Subject: Re: [NSRCA-discussion] Hacker ESC programming

   

  Same settings as Verne. 

   

  I measured V / A / rpm @ each different timing setting on my test stand using the Eagle Tree data logger / sensors. At least with the C50-14 Comp motor (21x14 prop), I observed no significant difference in max A (+-1.5) / rpm (+-15) @ same volts (+-0.0) between several measurements with timing @ 0 - 3 - 5 in varied order. There could be temp differences (didn't measure), but likely small given A are similar. So - 3 deg timing seems a reasonable setting.

   

  Logarithmical throttle response is much smoother than the others - especially noticeable with higher C batts.

   

  Earl

    ----- Original Message ----- 

    From: Verne Koester 

    To: NSRCA Mailing List 

    Sent: Friday, August 03, 2007 5:26 AM

    Subject: Re: [NSRCA-discussion] Hacker ESC programming

     

     

    C50 14XL Comp and Comp controller, TP 5300 batteries, APC 20.5 X 14, drawing 65 amps at full power

     

    Timing is 3 (that's where Andrew and Jason told me to set it)

    Acceleration is soft (only affects from dead start)

    Throttle curve is logarithmical with my radio (14MZ) set to -26 expo 2 (personal preference from experimenting)

    Don't remember where my cutoff is, I seem to recall 3 volts per cell but I'm never anywhere near it anyway.

     

    Hope this helps

     

    Verne

     

     

     

     

    ----- Original Message ----- 

      From: Stuart Chale 

      To: 'NSRCA Mailing List' 

      Sent: Thursday, August 02, 2007 10:50 PM

      Subject: [NSRCA-discussion] Hacker ESC programming

       

      OK it's a little quiet and I really do not understand some of the setting available in the Hacker ESC programmer.

      I have both the standard C50 14 XL and the comp version.  I assume that these settings are similar for other ESC's as well.

       

      Timing:  0-5 recommended for Hacker but what is optimal and what does changing it actually do J

       

      Acceleration:  What setting is everyone using?  Does this setting only affect a start from being stopped, or at all times?

       

      Throttle curve:  Is anyone using expo or logarithmical?

       

      What cut off voltage is appropriate for our current draw?

      I assume most people would use slow down at the cut off voltage and not instant stop.

       

      Thanks,

      Stuart

       

       

       

       


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