RCU Forums - View Single Post - New JR 3 Axis Aeroplane Gyro

11-19-2014 | 02:37 PM

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From: El Paso, TX

Quote:

Originally Posted by Mark Vandervelden

I just spent an hour or so this afternoon reading the manual for this new JR X-Bus Gyro, It can not be used as a loop in loop out PWM type gyro, my mistake.

Check out the user manual for your selves here

http://www.jrpropo.co.jp/english/dl/....php?hen=d0385

The most straight forward option is to use the RG731BX 7ch rx (you will lose its 7 PWM outputs) and connect up the Gyro via its X-Bus output.
This will allow you to use the 6ch PWM outputs on the gyro instead, this explains why there is a throttle output on the gyro .
This is OK for very simple airframes only requiring the 6 chs.

It would seem if you want to use more than 6ch this is the least you will need to do

For S or X-Bus Servos
Connect via X-bus to the gyro from an X-Bus Rx then from the gyro take its X-Bus output (consequently now loosing its 6x PWM outputs) to a X-Bus hub.
From there you can plug in up to 4x NX (JRs S-Bus) servos, or 3 NX Servos and its now empty 4th output on to another Hub giving 4 more NX outputs, or 3 NX servos + another hub and so on and so on, I think the limit with my XG14 was up to 56 X-Bus servos.This was achieved by having up to 14 gangs of 4 servos, each gang controlled as one ch but all 4 of that gang can be individually adjustable for end, sub, direction and travel .

Or for PWM Servos
Once the gyro is connected to a X-Bus capable Rx, from the X-Bus out on the gyro or any expander hubs in turn connected to it you can connect 1,2 or 4 way PWM converters, each giving you 1,2-4 servos for each converter.
So 1x Rx + 1x Gyro +1x Hub + up to 4x 4 way PMW converters = up to 16 PMW servos.

The RG731BX 7ch Rx gives a "simple" single Rx setup (you do lose its 7 PWM outputs), If you want better aerial diversity there are options like the RG031BX with its simple hub and 3x sats (no PWM outputs).

JR DMSS is a good system with a good solid RF link but I'm not totally convinced about the practicality of JRs X-Bus though , It seems to get more involved at every turn, when I tried an X-Bus setup on the bench last year it worked OK but had a high component count and did look a bit of a dogs dinner .

"and did look a bit of a dogs dinner ...now that is an Englishman's Descriptive at it's finest..!!! Howdy from Texas, USA..!!!

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