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Tyler

Elite Veteran

Chicagoland area

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I have a v-bar mini that will not initialize if the rudder servo is plugged in. If I unplug the rudder servo everything will connect. I can then plug in the rudder servo and fly.

Set up:

V-control
V-bar mini w/ sat
Xpert R2 cyclic servos (previously Futaba bls-451's)
MKS HBL-990 tail servo (previously Futaba bfs-251)
Kontronik Jive Pro 120hv (using bec w/ master and slave wires)
TelMe

The V-bar mini red "V" light will flicker and servos jitter. The Tx will not connect. As soon as I unplug the rudder servo the system will initialize and connect.

I first tried to swap out the tail servo. Then I changed all the cyclic servos as well.

Enjoy things that money can buy IF you don't lose the things money can't buy.

12-29-2016 01:25 AM
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Andy from Sandy

Key Veteran

Bedfordshire, UK

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Do you have to recycle the power or just unplug the tail servo?

Could you humour me and unplug the slave wire from the esc and try with the tail servo connected.

I had a 100LV that wouldn't power up properly with both leads connected.

No-one likes to publish the stall current figures?

12-30-2016 11:46 AM
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Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Too much power draw or shorted servo/lead...

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

12-30-2016 12:28 PM
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Tyler

Elite Veteran

Chicagoland area

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Unplugging the slave power wire gives the same results.

Xpert R2 servos are using on the cyclic and an MKS HBL-990 tail servo. All of these servos are known to be very efficient, the R2's may rank up there as some of the most efficient and power friendly during startup.

Also, Futaba bls-451 and bfs-251 servos were used before the Xpert servos were put into service.

I find it hard to believe that a 120a esc cannot start up 4 servos, especially when the bec in Kontronik has been touted as one of the most robust bec's on the market for many years.

Enjoy things that money can buy IF you don't lose the things money can't buy.

12-30-2016 02:24 PM
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Tyler

Elite Veteran

Chicagoland area

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I installed a small 2s lipo buffer pack with a switch. I power up with the lipo and then connect the flight battery to initialize the esc.

Just did a test flight and all works great.

Lipo does recharge from bec.

Enjoy things that money can buy IF you don't lose the things money can't buy.

12-30-2016 07:34 PM
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Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Too much current draw for the BEC to handle. Kontronik recommends one too... Glad you got it sorted....Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

12-30-2016 08:35 PM
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