Category Archives: AircraftTroubleshooting

When does a modern transponder respond to “ALL CALL”?

From the in-estimable Chad Micheal:

Follow up to this weekends phone call…..

The L3 NXT transponders are DO-181E compliant. Which means they do not accept “All Call” transmission on the ground. The aircraft has to be weight off wheels for”All Call” to work.
If atc at an airport wants to see the aircraft on ground or if a tech wants to check ground transmission with an IFR6000, they must ping the hex code for the aircraft to receive a reply.
In order to do a ground check using the IFR6000 box, you must configure the hex code in the settings block.



So take that!

Panel planner output to Visio to DXF Cut file.

ToolChain for Terry:


Use Panelplaner,

     Choose Template view on icons above panel.

     >File>Export DXF,

            “turn paths into polylines” is selected

            Name it _FilenameDXF_Draft

Open Visio

     File>Open>  Dropdown “Open File Types” so you can see the DXF

      Double click “Cad Object” Right Click >convert,    …….

      Assure there are no duplicate objects


      Create new outline objects with >FreeForm> drag curved shape,

      Use <CTL> click to Edit . Delete unused nodes, move end points and handles


      <CTL>A Assign to Lay, >NEW    Name layer “CutFileLayer”

      Paste standard objects (Red)  on top of Imported DXF object.

       Use “layer properties” select layers on and off to see 


File>Save>     …..SVG for future edit

>File>SaveAs>  Drop down .dxf..,     Name file correctly, place it in correct folder

This produces a useable DXF file for Laser, or Water, Or Mill








How do I generate  G-code from simple shapes.




Use Inskape or Impress to generate and layout shapes.
File>Export> Filetype .SVG


>Open .SVG

Touch a tool path highlight red then: CAM> Profile Operation.

Set parameters.


     Tool diameter, inside/outside cut

Calculate all

Next, go to ToolPaths. Select each one and check parameters.

Next, Export Gcode>select all>Export. Save NCFile

Rename .txt or .ngc

open in editor

find the following codes:

T codes which are tool change. delete them

add M1 at the top

Add S100 in the header for dummy spindle speed

file save as .ngc


Load to Linuxcnc














Astra , G100 slat flap testing

Three camera tripod legs.  Tape on the floor to hold the feet still.
Wooden dowel small enough to break of you run past the mechanical stops.
Still needs one person to monitor the jacks to be sure that are loose and free.
Works perfect




Temp endorsement in pdu


Cold 85 deg.  157k ohms

Less resistance when hot.  
100 deg is 39k