Re: Chap. 2 - Symbols

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tkat@tkat.com
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Joined: Sun Apr 10, 2005 10:47 pm

Chap. 2 - Symbols

Post by tkat@tkat.com » Sat Apr 23, 2005 8:44 pm

At the risk of perhaps "Preaching to the Choir", what follows is a
summary of a few hr's. work w/ CADintosh symbols.

I'm assuming that this'll get posted even tho I won't rcv it --- for
some unknown reason. I just hope I'm not missing others' longer posts
--- ITAS.

Repeating, I do small part mechanical dwgs. As such, there are several
common elements that I use constantly; i.e. C/L's, tapped holes,
zero/zero corners, &c. Follows is 1 way to create them

1st, I've dragged back my "Basic" screen and renamed it Chap. 2

After the symbols are created they can be stored in a permanent library
file and moved to w'ever dwg is active. Command-G is the key.

Symbols, create:


Center Lines: [This is what I did, you may have your own system or a
much easier way --- I'm just starting.]

°Select line type [#3] in lower left corner menu bar, 3rd from left.
°Select the free hand symbol in the lower left corner menu bar, 4th
from right and set a point [in line mode]
°Select any method of drawing a line 1.4" long; angle 0, length 1.4"
Note: w/ a 2 button mouse the right button brings up a menu w/ slide
outs to sub menus.
°Select midpoint symbol in LL cor., 2nd from right. Establish it on
the line.
°Select Transform->Rotate
°Enter 90° and hit return. Select line. Enter 1 & hit return

You should have a hole C/L symbol w/ .700 arms. If no, keep mess'n w/
it 'til ya do.

°Select Symbol->Symbol from Window in top main menu.
°Drag a box around the x-hairs.
°Select the center as "paste point"
°Name the group
°Select Symbol->Management from top main menu
°Select New for library. Follow the instructions.
°Hi-lite C/L in left list & hit "move" button.

Editing is just a matter of following the hi-lited prompts on the
Circle.

From there on it's just a matter of pull'n them back where you need
'em. This is Symbol->Insert & Symbol->Explode. Insert does it w/ no
scale change, explode allows x&y scale changes & rotational changes. I
haven't explored the other options yet.

Tapped Hole: This is one I use heavily. Like the C/L's, I save it as
a 1"er and scale as reqd.

°Redo the 1" C/L's & paste it s'where. There's gotta be a way to
"release" the symbol if dragged back but I can't find it yet. All that
happens on the Save Sym command is that the tapped hole is saved, not
the C/L's
°Select Circle->circle w/ ctr & rad.
°Select ctr of C/L lines
°Select .5 as the rad.
°Select Arc->ctr& rad
°Select .4 as the rad
°Select 45° as start angle
°Select 315° as end angle
°Select Symbol->Symbol from Window in top main menu.
°Drag a box around the lot.
°Select the center as "paste point"
°Name the group

Tapped hole: Side view

°Select Line->at an angle
°Draw a 1" vertical line
°Select Line->parallel
°Draw 3 lines to the right; .250", .225", and .025" Option-click-drag
is a zoom
°Select Line->point to point, auto mode, & close the ends
°select line style 3, C/L
°Select center point in bottom menu and locate the top horz. center of
the to be sym.
°Do the same on the bottom. A line will be drawn.
°Select Line->perpendicular
°Click vert C/L and a point above the top object line the length to
extend the C/L
°Do the same on the bottom
°Trim and clean up the dwg. by deleting the const. lines
°Put the drill point on the sym, I use line at angle and trim.
°Select the paste point. I use the C/L & the bottom horz line
°Select and save new sym as per above.

Zero Corner:

I use 2, Top left [& lr] & Top Right [& ll]

°Select pen 5
°Select Line->angle
°Draw a line 1" vert down
°continue the line 1" horz right.
°Auto mode, select Circle->ctr/rad
°Draw a .1" rad circle @ the line intersections
°Select Trim->trim and trim the parts of the lines inside the circle.
°Delete circle.
°Select Special->ellipse
°Draw a vert ellipse away from the lines. I used x=.2 & y=.35, Start
& end angles=0
° Draw a skewed line thru the ellipse to taste. Use transform
functions.
°Select the ellipse & line and move between the other 2 lines to suit
w/ Transform->move
°Construct a vertical line to the right of the features. This will be
the mirror axis.
°Select Transform->mirror.
°Select mirror axis
°Draw window around future symbol.
°Enter "1" and hit return. Opposite zero corner symbol is drawn.
°Select Symbol->Symbol from Window in top main menu.
°Drag a box around one of the future symbols
°Select the line intersection as "paste point", auto mode
°Name the group
°Repeat w/ the other symbol.

Whew! Enuf for the day.

Next up: Recreating the Fork Brace clamp.

Ciao,
Tkat


"Well, Chester, choos'n friends goes kinda fast when the shoot'n
starts."
Marshal Dillon

RowlandCarson

Re: Chap. 2 - Symbols

Post by RowlandCarson » Sat May 07, 2005 12:33 am

At 2005-04-23 11:44 -0700 tkat@tkat.com wrote:
>°Redo the 1" C/L's & paste it s'where. There's gotta be a way to
>"release" the symbol if dragged back but I can't find it yet. All that
>happens on the Save Sym command is that the tapped hole is saved, not
>the C/L's
Tkat - if you want to use an existing symbol as
part of a new symbol, you have to choose "insert
& explode". That way it forgets it was a symbol
and just becomes the original drawing elements
again from which the symbol was created.
>°Select Line->perpendicular
>°Click vert C/L and a point above the top object line the length to
>extend the C/L
I think this must be a typo - it doesn't seem to
make sense (we're not wanting a line
perpendicular to the vertical C/L), nor if I try
it does it do anything sensible for me at this
point in the drawing. I believe it should be
something like:


Select Trim->Trim
Click above C/L the length to extend it (or enter
co-ordinates for an exact value)
Click C/L to extend it


Sorry to be so late in responding to your useful
postings; I have a number of other things on the
boil as well!

regards

Rowland
--
| Wilma & Rowland Carson
| ... that's Rowland with a 'w' ...

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