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mr h · 09-13-2014, 06:46 PM

hi every one

ok need some help I bought my self a kontronik Kosmik 200 adjusted bec to 8v
plug it in to my 3sx with the

master to the 3rd channel on rx (running sbus)

slave to 3sx

but when I power up I get the orange light comes on but soon as the esc act or I hit the horizon mod switch it stays green

and I cant get out of it or use rigid mod, horizon mod,resuce mod

BUT if I take the bec off the esc and use a gryphon set at 8.5v to the rx and remove the red from the esc all works again.

what am I doing wrong?

GimpyGolden · 09-13-2014, 06:51 PM

I believe it has to do with time Kos BEC takes to initialize to full voltage, it is only 5.5V until unit is armed.
I think a work around was guy's were initializing the BD with a buffer pack then connecting Kos batt leads.

Might not be 100% accurate but someone will correct if I'm off base.
My solution, doff the BD and run a different FBL

dl7uae · 09-16-2014, 04:58 AM

Hi!

There're two odds happening w/ the BEC output of a KOSMIK or JIVE Pro at power up:

a) For a certain time the voltage goes crazy (ups and downs).
b) If the voltage has stabilized - then at 5.5..5.6 volts only. Only after everything has initialized the voltage will be switched up to the set level.

That may confuse devices supplied by the BEC, worst case multiple resets may occur which especially could disturb the start-up calibration of a FBL system.

The crux w/ the BD is, - if satellites are connected, - that the BD needs to have 5.5V at minimum to be able to supply satellites with minimum required voltage. It's a bit strange.. and I ask myself where (regulator) and why they (Captron) waste so many volts for 3.3 volts stabilized supply voltage to satellites.. Isn't this a LDO (low-drop regulator)?
However, it is just so..

Raptorapture · 09-18-2014, 07:29 AM

I'm doing close to what GimpyGolden said. Buffer pack to 3SX in parallel to Kosmik. However, Kosmik never unplugged. Buffer pack connected via switch, first on last off.

I would recommend not having one power to FBL and one to receiver. Potentially reduced current available as line between receiver and FBL may be thinner and possible ground loop imlo, l standing for limited

Next, after having both power lines go to FBL, have the master go to throttle on 3SX but remove the signal wire and create additional servo connector with no ground going to channel 3 on receiver. Achieves same result re dropping rpm if throttle signal missing. Finally, S.BUS connector between receiver and 3SX providing all channels except throttle to FBL, power to receiver and ground to receiver for throttle signal. The added benefit is if FBL blows up, power lost to receiver causing throttle signal to drop sending ESC into failsafe which may not happen if receiver has direct power.

Cheers.

09-13-2014, 06:46 PM	#1 (permalink)
mr h Registered Users Join Date: Nov 2013	mind blowing problem NEED HELP hi every one ok need some help I bought my self a kontronik Kosmik 200 adjusted bec to 8v plug it in to my 3sx with the master to the 3rd channel on rx (running sbus) slave to 3sx but when I power up I get the orange light comes on but soon as the esc act or I hit the horizon mod switch it stays green and I cant get out of it or use rigid mod, horizon mod,resuce mod BUT if I take the bec off the esc and use a gryphon set at 8.5v to the rx and remove the red from the esc all works again. what am I doing wrong?

09-13-2014, 06:51 PM	#2 (permalink)
GimpyGolden Registered Users My HF Map location Join Date: Nov 2009	I believe it has to do with time Kos BEC takes to initialize to full voltage, it is only 5.5V until unit is armed. I think a work around was guy's were initializing the BD with a buffer pack then connecting Kos batt leads. Might not be 100% accurate but someone will correct if I'm off base. My solution, doff the BD and run a different FBL __________________ Scott Team RotorQuest

09-16-2014, 04:58 AM	#3 (permalink)
dl7uae Registered Users Join Date: Feb 2008	Hi! There're two odds happening w/ the BEC output of a KOSMIK or JIVE Pro at power up: a) For a certain time the voltage goes crazy (ups and downs). b) If the voltage has stabilized - then at 5.5..5.6 volts only. Only after everything has initialized the voltage will be switched up to the set level. That may confuse devices supplied by the BEC, worst case multiple resets may occur which especially could disturb the start-up calibration of a FBL system. The crux w/ the BD is, - if satellites are connected, - that the BD needs to have 5.5V at minimum to be able to supply satellites with minimum required voltage. It's a bit strange.. and I ask myself where (regulator) and why they (Captron) waste so many volts for 3.3 volts stabilized supply voltage to satellites.. Isn't this a LDO (low-drop regulator)? However, it is just so.. __________________ Tom (j-log.eu)

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09-18-2014, 07:29 AM	#4 (permalink)
Raptorapture CHC Benefactor Join Date: Feb 2006 Location: Singapore	I'm doing close to what GimpyGolden said. Buffer pack to 3SX in parallel to Kosmik. However, Kosmik never unplugged. Buffer pack connected via switch, first on last off. I would recommend not having one power to FBL and one to receiver. Potentially reduced current available as line between receiver and FBL may be thinner and possible ground loop imlo, l standing for limited Next, after having both power lines go to FBL, have the master go to throttle on 3SX but remove the signal wire and create additional servo connector with no ground going to channel 3 on receiver. Achieves same result re dropping rpm if throttle signal missing. Finally, S.BUS connector between receiver and 3SX providing all channels except throttle to FBL, power to receiver and ground to receiver for throttle signal. The added benefit is if FBL blows up, power lost to receiver causing throttle signal to drop sending ESC into failsafe which may not happen if receiver has direct power. Cheers.

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