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Old 02-19-2017, 09:14 PM   #1 (permalink)
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Default Kontronik ESC settings for KDE G3 motors?

I am trying to figure out the optimal Kontronik ESC settings for the KDE G3 motors. The Kontronik ESC parameters I am interested in are the following:

1) Auto-timing vs. Fix-timing
2) P-part (default is 4)
3) Ri-Comp. (Default is 4mOmh)

These are the helicopters I have with Kontronik ESC and KDE G3 motors:

1) Synergy 806 (806mm blades) with Kontronik Kosmik 200HV ESC and KDE700XF-455-G3 motor on 14S

2) Synergy E5 stretch (606mm blades) with Kontronik Jive Pro 120HV ESC and KDE600XF-530-G3 motor on 12S

3) Synergy E5 (556mm blades) with Kontronik Jive Pro 120HV ESC and KDE600XF-1100-G3 motor on 7S

4) Goblin 380 with Kontronik Jive 80HV ESC and KDE500XF-925-G3 motor on 6S
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Old 02-20-2017, 10:41 AM   #2 (permalink)
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Use auto timing, ri-comp same as the internal resistance value. P gain is about 10. Some of my helis works well with P-gain 8.
Two of my helis' tail kicked right on pitch pump because of the instant torque generated by the KDE motor. I ended up using bigger tail blades (116mm Rail) to get it right.
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Old 02-20-2017, 12:20 PM   #3 (permalink)
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Ok. So the Ri.Comp. value seems pretty straight forward then; just plug the number from the motor specs. Thank you for explaining this.

As far as timing, I believe folks recommended fix-timing of 15* for older prior generation KDE motors. Is it fair to say that newer G3 motors work optimally with auto-timing?

I still don't understand P-part. Is this a gain? If so, what do you experience when the value is either too high or too low? What's the endpoint for determining the optimal value?
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Old 02-21-2017, 11:02 AM   #4 (permalink)
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G1 and G2 can cause commutation error in Kontronik ESC auto timing. With G3 it doesn't cause the issue. Auto timing works very well for me. You can still set to fixed timing if you want. Sorry I don't what would be a good timing to use.

Yes, P is part of the gain. Kontronik hide the i gain from the user. There was a recent thread in the Kontronik thread referred back to an official explanation on how Kontronik ESC works. It says you need to raise the p part when raising the ri-comp. Like all gains there is a limit and optimal value for each application. If p gain is too high, you will hear chirping noise or tail wag. Too low then the head speed won't hold. The log can help also. On all my Kontronik ESC, the headspeed are within 30rpm most of the time. You can increase the gain if the headspeed varies too much. Adjust 2 points each time until you find the one works for you.


Edit
Here's the post I referred to. https://www.helifreak.com/showpost.p...2&postcount=25

Here's the thread referred to the above post https://www.helifreak.com/showthread...58#post7287781
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