varaible advance

[dusty IV]

I just read an article by Ken Myers on adjusting timing for outrunners. Very interesting.

I'm wondering does CC Pheonix ESC have automatic variable timing like a car engine to change the timing advance as the RPM changes?

I keep my updates current on my Pheonix ESC. My motors are mostly AXI outrunners.

When I up date the software it now sets the advance to low as I remember. Does this timing change to fit the RPM or is it fixed?

I hope I explained this question properly.

[Andy W]

Phoenix ESC's do adjust advance automatically based on throttle and RPM. The Low/Medium/High setting just controls how far advanced it will go..
..a

[RC Man]

Yes, the Phoenix has had that feature for many many years.

[dusty IV]

Very cool. I should have known CC would have this feature.

Next question is the advance curve linear? Is there any way to access it and make your own curve? I would think the curve would be a function of the RPM, load and voltage.

Sounds like right now it's similar to the old car distributors that you could rotate to advance or retard the basic curve. Then if you wanted to change the curve you got different springs. Now you buy after market chips to do this.

I don't know anything about what type of curve outrunners like or if they are all the same.

I fired up an old AXI the other day and found it sure didn't like the low setting. It shuddered and jerked back and forth until I got a few RPM's going. I changed the advance to the middle setting and then it calmed down.

I notice also that some outrunners "ring" on certain advance settings. I assume that ringing is a bad thing.

[Andy W]

I wish Castle would post somewhere the settings they used with every type of motor they've tested. A sticky here with just the power system config (motor X, so-many cells, this prop) - and the best timing/pwm etc..
..a

[RC Man]

They have commented on timing in general terms. Outrunners LOW Advance. Inrunners Standard Advance. That has always worked for me.

The only exception i have found is the large Neu Motors ORK series (1900 series). Steve Neu suggests using low advance and I have found that this does work a little better than standard advance – the motors make the same power and run cooler.


:cool: RC