Mitch Grunes's DrawArcs program
to draw skate blade rocker curves.
The idea is to use these to measure existing blades
This index.html index of contents
Files relating to my
DrawArcs program to draw
skate blade rocker curves, with length scales along each curve, and
straight line inch scales along the boundaries and centerline.
DrawArcs.f90
My (free format) FORTRAN 90 (or newer) language program that creates
Postscript output.
DrawArcs.txt The parameter file it generated during a
run. This is a text file that you can edit to make minor modifications,
and the program has an option to read from it.
This default run includes rocker radii radii 78" - 99" at 3 inch intervals,
and 6" - 30" at 1 inch intervals.
DrawArcs.ps The principle output file, containing
Postscript text commands from that run. Labelled to be
human readable, though it is a bit long
ghostview can display it with
print*,' gv -media=Letter DrawArcs.ps
DrawArcs.png An Image file prepared from same, at 1200 dot/inch resolution.
DrawGrid.f90 Modified DrawArcs to draw
.5 inch grid + .1 inch tics to test x,y scaling and orthogonality.
DrawGrid.txt Similar for that program.
DrawGrid.ps
DrawGrid.png
Compare7_8foot.f90 Modified DrawArcs to draw
unspaced 7 and 8 foot rocker curves only, for easy comparison.
Compare7_8foot.txt Similar for that program.
Compare7_8foot.ps
Compare7_8foot.png
However, it turns out that my printer does not scale output correctly. To get accurate
scaling, I need to enlarge x-axis coordinates by about 9/8=1.125, and y-axis coordinates by about 12/11=1.09090909... I found this corrections by measuring DrawGrid.png. To implement that correction I created
DrawArcs2.txt
DrawArcs2.ps
DrawArcs2.png
DrawGrid2.txt
DrawGrid2.ps
DrawGrid2.png
Compare7_8foot2.txt
Compare7_8foot2.ps
Compare7_8foot2.png
Of course, you should instead find scaling corrections for your printer.
DrawArcs.zip contains a compressed zip archive of the
rest of this folder - to simplify transfer.