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Scottish Schools Equipme… Research Centre Graphics
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SSERCGRAPH.iso
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gears
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1993-03-05
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SSERC Graphics CD-ROM
5
------- MAKING GEARS IN OTHER SIZES --------
These gears were produced using the programs in
this directory. You can make any size of gear
you like! You can easily edit the scale, the
line width, or colour fill.
When a program asks you to give a filename to
your drawing, you can give a whole pathname,
eg. $.MyDir.Model.Junk7 or whatever.
RAM:Junk7 or suchlike is quite useful, if you
have a RAM filing system configured; it saves
typing whole pathnames. You can then drag the
files to the appropriate directories using the
Desktop. If you simply give a filename, your
drawing will be stored in the current
directory.
If you import the files produced by the
programs into an already opened Draw window,
the gears will arrive centred on the pointer.
If Grid Lock is on, the centre will be on a
grid point. If you start them by double
clicking, they will be centred on the bottom
left of the window. We use a metric grid.
CheapGears and GoodGears mean just what they
say. CheapGears is useful, however, because
the files produced are only about half the size
of the files produced by GoodGears, the
drawings are easier to work with, and they
don't take so long to appear on the screen, or
to print. GoodGears doesn't yet have
corresponding racks, bevels, or isometric
views, but these should be available before
long.
With the CheapGears program, use negative
numbers of teeth to get profiles suitable for
internal gears. You have to do a little
editing to get the interior white, and a
grey-filled circle behind. To make a
grey-filled sector gear (internal or external
teeth), you'll need to close the path.
This messes up the last tooth: the best
solution is to create one too many teeth in the
first place, and then change the extra tooth
into the non-toothed edges. You need 'convert
to line' to straighten the resulting curves.See
the ReadMes in Isometric for help with
isometric drawings.