ROTFLA,,,, It bites me in the ass every time! We have been cleaning
dads house out for the last 4 days, 37 years of collecting.
Speaking of Bdays, my neighbor the computer guy's wife used to live in
the same neighborhood as my dad, she lived in a 6 house cu-de-sak that
was the end all to Christmas decorating. Any way her Bday is 8/24.
No math required - just arithmetic :-).
If you want a 1/4" border at each end, the center of each of the end
holes has to be 5/8" (1/4" + 3/8") from its end.
That leaves 4 3/4" between those 2 holes. In that space you have to put
4 more holes with 5 spaces between holes. 4 3/4" divided by 5 gives a
spacing of just over 15/16" (4.75 / 5 = 0.95).
Since that doesn't come out even, you need to take the slop (1/16") and
redistribute it to each end. So instead of the centers of the end holes
being 5/8" from the end, they should be 21/32" from the end.
Or you could just ignore the slop and have one space be 1/16" wider than
the others :-).
I hope you're aware that those holes are only going to have 3/16" of wood
between each pair.
Intelligence is an experiment that failed - G. B. Shaw
Here's a way to do it by only actually measuring two points. The rest
is mechaincal division.
SInce you're spacing 3/4' holes within 5 1/2 inches, you've already
defined a 1/4" border on each end. The radius of your hole is 3/8".
Thus, the centerpoint of each outer hole is 5/8" from the edge. Mark
Now, draw a line though each point, parallel to the ends of the board.
Since you're marking the center points of 4 holes and using the center
point of the other outer hole as your terminus, choose a number easily
divisible by five (like, oh, 7.5 or 10). Lay the zero point of your
ruler on one line. Swing the ruler until your chosen number lies on the
other line you've already drawn.
Then, just mark the correct divisions (1 1/2, 3... or 2,4, 6...) and
you've marked the center points for the other four holes. Draw lines
through those points and parallel to the ends crossing your center
line, and you're done.
You can, of course, tell people how brutal the math was in calculating
those points... but if you wanted to add the same dimension (x2)
outside your row of holes as between each hole, the math is more than I
want to deal with.
You don't need math:
Set the ruler (or tape measure) on a diagonal across the piece so that
the 6" mark is even with one end the 0" is on the other end. Mark off 1"
increments on the diagonal. You can also use even multiples of the
spaces needed, say 30" and mark off every 2" for 15 spaces.
It's called Sketchup and I'm surprised Swing and Leon didn't mention it.
Simply draw a line the distance you want, "select" the line with the
select tool (space bar), right click on the line and choose "divide"
from the resultant pop up window. Move the mouse along the line and it
will be divided into whatever number of divisions you want, and based on
the length units you use(window/model info.) I use 1/16th's. The red
dots show on the line, and the distance between the dots is given.
Once you have the right number of dots, click and it puts invisible
markers (invisible until you roll over them) so you can do whatever you
want with them, or just write down the distance and have at it.
For 6 holes in 6 inches you need 7 segments, and each hole will be
55/64's or 7/8ths. I can't see 64ths so 14/16th work fine for me:-)
The bonus is, since you are in a cad program, you can draw up whatever
you want the holes for, and see what it will look like:-)
Add Life to your Days not Days to your Life.
I haven't read all of the messages before this one, so please excuse me
if this has been suggested. But why not build a *paper model* (you don't
need high-power computer software for this problem). Cut out a 6" piece
of paper and some circles (use a marker and color them black if it helps
you see them). Then move them around until it looks right to you and
then tape them in place. Then you have a model which you might use in
any number of ways. I think more things have been built working like
this than by designing with cad/cam software.
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