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Old May 25, 2014, 11:14 AM
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United States, WI, West Bend
Joined Jan 2014
53 Posts
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AfroESC 30A + HL W42-20 880KV = Stuttering/Sync Bad

I have a Quadcopter that's somewhat custom, using hex600 sized arms, but a quad chassis that I built. I had been running this on a single 3s 5000mah pack, but wanted to move to a dual 4s 4000mah setup since I have a lot more 4s packs available.

The ESC's on there were the red brick 30a ESC's from ebay, cheap. They claimed to support 3s-4s, but running a single 4s pack for a short time caused the magic smoke to come out of them. So, I bought 4 AfroESC 30A esc's with the latest SimonK firmware on them, the SAME ESC I run on my Hex800 with a bigger motor with no problems on dual 4s packs.

The motor I use is:

HL W42-20 880KV
http://www.himodel.com/electric/HL_W...ft_for_3S.html

The ESC is:
Afro ESC 30Amp Multi-rotor Motor Speed Controller (SimonK Firmware)
http://hobbyking.com/hobbyking/store...Firmware_.html

It seems to run unloaded with no stuttering/sync problems, but I've tried 10x4.5, 10x5.5 and the prop I want to run is a 12x5.5. The problems don't really seem to change all that much dependent on the prop size.

I've tried EVERY single thing in the firmware that I can change, and still have stuttering problems.

The best I can get it, is that if I set it with timing for about 15, change the power rates to bring the power in VERY slowly and set the SLOW_THROTTLE to 1, I can get it to run all the way up to full throttle, as long as I don't have any sudden throttle changes.

I swear I've flashed it probably about 100 times now and changed so many parameters in the firmware, but nothing very reliable. Some changes prove less stuttering/sync, but some changes I can't even get it to spin up at all without the problems.

Currently I found the best version of the SimonK software that provides the least amount of stuttering is:

tgy_testing_2013-10-29_8c2cf42_comp_pwm.zip
from:
http://0x.ca/~sim/tmp/tgy_testing_20...2_comp_pwm.zip

Can anyone please give me some advice?
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Old May 26, 2014, 05:31 PM
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United States, WI, West Bend
Joined Jan 2014
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No suggestions at all?
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Old May 27, 2014, 12:22 PM
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United States, WI, West Bend
Joined Jan 2014
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Really would like some help with this!
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Old Oct 06, 2014, 02:13 AM
Registered User
Joined Dec 2011
8 Posts
afro esc sync loss

Hi there,

I crashed my tarot 650 twice with afro esc's loosing sync. Pretty much tried everything as well. Seems like certain motors just does not like the simonk afros. I changed my 390kv multistar motors with rctimer5010 360kv and problem solved! So I suppose you just have to get the combo correct
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