Chap 4 - Sect. Lines, Hatching, & Dimensions
Posted: Sun May 01, 2005 4:06 am
Attachments :SECTION LINES:After working w/ the pgm ones --- I've given up!They may work, but not for me. They seem to be European style and only straight lines. For mech parts here I was taught --- albeit, in the days of lead & vellum --- that you could bend 'em any which way you wanted to show the reqd details. We also have a different convention for the directional arrows.Here's what I've decided on:I have made 2 new symbols and added them to my Mech Sym library. The 1st is a right angle pair of lines and the 2nd is an arrow point. I selected pen #4, and line #4.1. Select X-line->Polyline2. Select freehand mode, click in the co-ord menu & set an off-dwg point3. Enter 0,0 & return.4. Enter 0,-,5 & return.5. Enter .5,-,5 & return twice.This should draw a corner [change direction] sect line. Turn it into a symbol, Symbol->from window [top menu]. Put the paste point @ the turn and name it.Call it back, cmd-E, to any old point, change to line #1 & on top of the vertical line draw an arrow. I drew one side & then used the mirror function. Turn it into a symbol, yadayada.Now go to the dwg and insert the sect lines as desired, cmd-J, will allow you to rotate the basic angle as desired. Stick the arrow point on the appropriate vertical lines to show the cut.TA-DA!Oh, move the basic point back too.============================================HATCHING:This feature needs some work too. Or at least I think so.I've 2 areas that need covering. The cut thru the center of the part on the left & the cut thru the island.Hatching is found in the tool pallet, 2nd col, 5th row. Starting on the left sect --- 1st, just flat scale up to 250~300%. You'll never be able to select the reqd. lines @ 100%.1. Select Hatching->material. Just do it --- don't ask why.2. Follow the prompts and select the contour.3. Follow the prompts.If this works --- good! You may want to go to Hatching->change attribs and try correct'n the grey scale pblms I've hit. [grmblgrmbl]The right side works the same. It looks like the tapped hole is an island but no. That's just the scale inaccuracies of the pgm. Treat it as one contour.========================================On to dimensions.SCREWIT --- It's after 5:00 o'clock s'where. 'Cooler time.OK, let's work w/ the elevation view 1stWOOF!! This is s'th'n else!! [After 90 min of work]. It will generally get the job done but is a bitch to work w/. Let's be "P.C. --- ah--- polite" and say "needs some work".1st, it has too many lines. In mech dwgs, all I want to see is a Ø/Ø symbol for a corner and then a dim @ an appropriate place to denote a feature. No lines go'n back to the ref. That's known. Program'n is done from the last point to the next one & absolute mode takes care of stack up tolerances. H'ever, this is what we have to work w/. 2nd onwards comments come later.Work'n w/ the left side 1st: Move the basic point to the Ø/Ø cor if not there. Go to Options->dim's top menu & set global to yer lik'n1. Select Dimension->multi parallel & auto mode.2. Select the btm line as the ref line.3. Click on the 4 points to be dimed on the left in ascending order. Work from the bottom to the top.4. Hit return to position dim's. NOTE: Chain as many as you want and then hit return. See where I put 'em.5. Start again: select btm line. Work'n in the mdl of the dwg, this time click down on the 2 interior dim. Hit return an position as desired.Mov'n right.6. Again select the btm. Select the top of the 60° cut and the top of the part. Hit return.7. Select dim placement.8. Tapped hole. Select Dim->vert. & follow prompts.9. Since this isn't exact, Select Dim->edit [don't ask why 'change attrids don't work]. Change to 1.00. Hit return.10. Now Select Dim->move. Pick 1.00 and move it up to get out of the x-hatch'n.I don't know if that's reqd. I don't have a work'n printer ATM but I'd guess it was.Please note: I prefer slashes as end markers. This can be selected from the top menu: Options->dimensions, check global.It's go-home-time. Chap 4A 2mrw --- dim's on top view.I know this is tak'n some band width & I hope it ain't in vain. But if n'th'n else, I'm learn'n and putt'n the notes inna permanent folder.Ride Tall, Tkat From Murphy's Rules of Combat:"Tracers work both ways."