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ollie2893 · 02-03-2011, 08:57 AM

My TRex 600e shows gentle tail oscillations that I cannot seem to get rid of. They are really small, so perhaps I am nit-picking. I would like to reduce Parameter D further but I am already on purple. I dialed Pot 3 down by 8 mins because my stops were too aggressive and that has improved the situation some. I am not sure what else to look at. I even upgraded the tail rotor, but no joy. Any other ideas? My servo is a S9253 and the link is on the 2nd hole from the inside. Incidentally, the oscillations seem greatly amplified in inverted - anyone cane think of any good reason for this? Thanks.

JustPlaneChris · 02-03-2011, 10:36 AM

Are you running your ESC in governor mode? Gentle oscillations like you describe are very often caused by governor gain / motor pulsing.

ollie2893 · 02-03-2011, 10:40 AM

Darned. Good point, Chris. That's very likely it. Thanks.

JustPlaneChris · 02-03-2011, 10:47 AM

It's bitten me more than once.

gregg25 · 02-04-2011, 08:40 PM

chris i wondered the same thing about the gain , using the ice 100 and the scorpion 4020 1390 i was at 7% i tried lower and no difference but not a good lock on hs . too high tho with this esc and striped gears .

ollie2893 · 02-27-2011, 09:32 AM

For completeness, here is the final resolution to this particular nuisance: https://www.helifreak.com/showthread...52#post2719252

02-03-2011, 08:57 AM	#1 (permalink)
ollie2893 Registered Users Join Date: May 2009	Very gentle oscillations on purple My TRex 600e shows gentle tail oscillations that I cannot seem to get rid of. They are really small, so perhaps I am nit-picking. I would like to reduce Parameter D further but I am already on purple. I dialed Pot 3 down by 8 mins because my stops were too aggressive and that has improved the situation some. I am not sure what else to look at. I even upgraded the tail rotor, but no joy. Any other ideas? My servo is a S9253 and the link is on the 2nd hole from the inside. Incidentally, the oscillations seem greatly amplified in inverted - anyone cane think of any good reason for this? Thanks.

02-03-2011, 10:36 AM	#2 (permalink)
JustPlaneChris Registered Users My HF Map location Join Date: Jul 2006 Location: Temple, TX	Are you running your ESC in governor mode? Gentle oscillations like you describe are very often caused by governor gain / motor pulsing. __________________ Chris Boultinghouse

02-03-2011, 10:47 AM	#4 (permalink)
JustPlaneChris Registered Users My HF Map location Join Date: Jul 2006 Location: Temple, TX	It's bitten me more than once. __________________ Chris Boultinghouse

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02-03-2011, 10:40 AM	#3 (permalink)
ollie2893 Registered Users Thread Starter Join Date: May 2009	Darned. Good point, Chris. That's very likely it. Thanks.

02-04-2011, 08:40 PM	#5 (permalink)
gregg25 Registered Users Join Date: Nov 2008	chris i wondered the same thing about the gain , using the ice 100 and the scorpion 4020 1390 i was at 7% i tried lower and no difference but not a good lock on hs . too high tho with this esc and striped gears .

02-27-2011, 09:32 AM	#6 (permalink)
ollie2893 Registered Users Thread Starter Join Date: May 2009	For completeness, here is the final resolution to this particular nuisance: https://www.helifreak.com/showthread...52#post2719252

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