Sector Table

The Fiddle Yard comprises a Sector Table, mounted in a rhomboid board. The table is 15″ overall (7.5″ radius). There are three tracks, which are energised via brass bolts, which also locate the tracks with the entrance track.

Fiddle Yard exit

Fiddle Yard exit

Some details of the pivot, which also provides the electrical common return to the tracks.

Underside of Sector Table

Underside of Sector Table

Fixed aluminium socket

Fixed aluminium socket

 

Pivot pin

Pivot pin

Top of Sector table, showing locating bolts

Top of Sector table, showing locating bolts

My apologies to any who have previously used the calculations below – I found an error in my Formula 3, and so have corrected, as of 1 May 2017.

I have described how I calculated the radius of the curved tracks here:

A spreadsheet to assist with calculating the curves here:

One Response to “Sector Table”

  1. Paul Morrison (Old Cambridge Paul on NGRM) Says:

    Very useful — sector tables are much easier to construct than traversers. Useful too if through running is required for continuous run.

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