There is a utility you can download from the front panel express
website for designing dials, arcs, and so forth.
Jim W8ZR
Sent from my iPhone
On Apr 9, 2014, at 5:52 AM, Paul Christensen <w9ac@arrl.net> wrote:
>> "Can anyone give me some pointers on creating a 150 degree arc label for a
>> band switch for Front Panel Express? I have a radio switch 86 switch with 30
>> degree detents. 6 positions, 160-10 meters."
>
> If an actual arc is needed, you can select "Insert Curved Slot" from the
> menu. Then select the engraving width/depth (e.g., cutter 0.6mm). The slot
> can be rotated, expanded, degrees set, etc.
>
> To set up 30-degree index positions (and optionally with with engraved lines
> radiating from center), you can use trig functions on Cartesian coordinates.
> For all switches, I used the switch center hole as the Cartesian origin. Once
> you decide on the distance to engrave from the switch center -- and you
> already know the angle, then solve for (X, Y). Take the computed X
> coordinate and add it to the the origin's X coordinate. Do the same
> computation for the Y coordinate.
>
> When recently solving this for a 2-position switch, I wanted to take
> advantage of the switch's locking tab and insert it into a blind hole on the
> panel reverse side. So that the position center center lined up vertically,
> this meant that position 1 is 15 degrees left of vertical and position 2 is
> 15 degrees right. Instead of solving by using the actual 30 degree arc, it
> was easier to solve using 15 degrees.
>
> You're welcome to my panel file if you want to have a look.
>
> Paul, W9AC
>
>
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