Today I fired up my system and tried out the Elevator trim. I dont have the stick wired up yet so used the controls through my Skyview unit. It moved up and down fine but the trim widget didnt reflect the movements.
After a lot of poking around and disassembly of the tail I traced the fault back to the D25 connector at my VP-X Sport. I had the blue and green wires swapped on both the elevator and aileron trims. Ray allen dont seem to document what the wires are too well and when I wired the connector I just used a reasonable wiring scheme and planned to copy it all along but then I would end up with a blue goes to green and a green goes to blue somewhere.
I decided to swap at the connector at the VP-X and stay consistent. this is not an easy fix getting the pins out.
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| Swapping Wires at J01 at the VP-X D25 Connector |
I updated the drawing with the wire colours for later reference after lesson learnt:
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| Updated VP-X Schematic |
I will share my full drawings when I have finalised them.
So now the widget looks like this (2nd from bottom right:
Bingo - I can now see data in my skyview. Spent a lot of time reading up on how to get the widget working. You have to calibrate it and set it to VP-X in skyview. Turns out you don't have to swap the up/down wires if you have them wrong as the calibration process sorts this out for you. After calibration you can see a little bar and a green mark for Take off trim too.
This may be the last time I open this D25 connector - the Spiral wrap is temporary as it would smoke if there was an electrical fault, it will be tied the old fashioned way with waxed line once I know I am done with it.
So now the widget looks like this (2nd from bottom right:
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