102 - Snapping and Geometry.doc

8/10/2019 102 - Snapping and Geometry.doc

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FeatureMILL2.5D Snapping and Geometry

Snapping and Geometry

Introduction

This module will provide an understanding of how different snapping modes wor and how

Geometry is !reated within Feature"#M. $y the end of the module the user will %e a%le to

!onstru!t geometry and understand how ea!h snapping mode fun!tions.

User Interface

Geometry constructor !ommands !an %e a!!essed in three different areas of the user

interfa!e.

• Commands can be accessed by clicking the Geometry icon in the Steps

view:

• Can be accessed through the File Menu by

clicking on Construct

FeatureMILL2.5D 2&'' 1




• Or may be

accessed by thegeometry toolbar (to show thegeometry toolbar from the File Menuclick on View thenToolbars thencheck the Geometry checkbox and press OK)

The geometry tool%ar uses flyout menus. The last item previously sele!ted is displayed as an

i!on in the tool %ar.

• Click on the triangle to reveal the flyout menu.

These flyout menus are used throughout Feature"#M and are useful for easy a!!ess to many

program fun!tions.

Snapping mode !ommands !an

%e a!!essed in two different

areas of the user interfa!e.

• napping mode

commands can beaccessed through thefile menu by clicking onoptions then snappingmodes

2 FeatureMILL2.5D 2&''




• napping modes may also be accessed through the snapping toolbar(to

show the snapping toolbar! from the file menu click on iew then toolbars then check the snap mode checkbox and press OK).

Snapping

• Open "eatureC#$ by double!clic"ing the "eatureC#$ s#ortcut icon on

the desktop:

• Clic" on Open an e$isting file in the %ew &art 'ocument wiard window

then press %e$t.

• rowse to the examples folder and click on *Snapping&fm+ then press

open

The part when open should loo similar to the image %elow(

• $ake sure the snapping toolbar

is shown. ,o show this menufrom the File Menu click on-iew then Toolbars then checkthe Snap Mode checkbox. #lso make sure Standard andGeometry are also checkedthen press OK.





The snapping toolbar will appear(

Looing at ea!h i!on from left to right we will give a short summary of ea!h item)s fun!tion(

nap to grid causes the cursor to snap to predefined increments defined underOptions and Snapping Grids

nap to &oint snaps to a point obect

nap to /ndpoint snaps to the ends of finite lines and arcs. /ndpoint also appliesto the corners of the stock and vertices of a solid

nap to $idpoint snaps to the middle points of finite lines and arcs.

nap to ection snaps e0ual intervals of a finite line. ,he number of sections iscontrolled by the ections parameter of the napping Grids dialog box.

nap to 1ntersection snaps to the intersection of lines! arcs and circles.

nap to Center snaps to arc and circle centers. ,his setting also controls thedisplay of circle and arc center points.

nap to 2uadrant snaps to the four points on a circle corresponding to 34! 534!6734 and 8934.

nap to Obect snaps to a point on another obect. ,his includes lines of surfaces

and is convenient for snapping points to locations on a surface.

nap to ,angent snaps the point so that the obect you are creating will be tangentto the obect you snapped to.

nap to ,oolpath will snap to toolpath lines

,he nap 'iscrimination dialog button displays the nap 'iscrimination dialogbox whenever there is an ambiguous pick. ,his dialog box will list the possible pointsto snap to and ask you to pick the one you want.





Snapping '$ercise

The e*er!ise %elow will review ea!h of the snapping modes on the snapping tool%ar from left

to right. +hen !omplete it will provide a %asi! overview of ea!h snapping modes fun!tion.

• $ake sure none of the snapping buttons are depressed

• (ig#t!clic" on the Orange circle and press

Center Selected

• Click on the connected line constructor button from the geometry toolbar

• 'raw a s0uare in the center of the circle by clic"ing once in the upper left!

then upper rig#t! then lower rig#t! then lower left then upper left.

If your hand does not move perfe!tly it will %e

impossi%le to do this. +e have a tool that !an help

snap to a "artesian grid

• &ress Undo until the line segments

disappear. ,his button is at the top of "eatureC#$.





• $ake sure none of the snapping buttons are depressed then press the

Snap to Grid button

ou should then notice a faint grid appears

• 'raw a s0uare in the center of the circle by clic"ing once in the upper left!

then upper rig#t! then lower rig#t! then lower left then upper left.

Clic" on the elect icon at the top of "eatureC#$ on the tandard

,oolbar to cancel the line drawing. ;se this button at any time to exitselection mode.

,ou should noti!e that the s-uare !reated was mu!h easier to !reate. This is %e!ause the

!ursor snaps to a predefined grid designated under the File Menu under options then

snapping options. Snap to grid overrides all other snapping options so it is suggested to

leave this option off if you need to use any of the other snapping modes.

• Unc#ec" the snapping grid and check snap to point on the snapping

toolbar. elect connected line from the geometry toolbar again.





• Moe the mouse cursor around the screen and try to get it to snap to an

obect on the screen

oti!e that the only o%/e!t we !an get this to snap to is a point. The only o%/e!t snap to point

will snap to is a point. There is a point inside the s-uare you /ust !reated0 snap to it.

• ;ncheck Snap to )oint and check snap to endpoint.

• <ocate the teal horiontal line segment located in the upper left hand of the

screen. 1f you are still oomed in! right click your mouse in the graphicswindow! off the part! and select Center #ll. Select connected line again

from the Geometry toolbar.

• Moe the mouse cursor from the left to t#e rig#t over the line.

1%serve that only the line segment endpoints are snapped to. Snap to ndpoint snaps to the

ends of finite lines and ar!s. ndpoint also applies to the !orners of the sto! and verti!es of a

solid.

• ;ncheck Snap to 'ndpoint and check Snap to Midpoint. #gain position

the mouse cursor over the teal horiontal line segment. *oer the mousecursor over the center of the line segment.





,he cursor should snap to the center of the line segment.

• <ocate the black arc below the teal horiontal line segment

• Snap to t#e center of the line segment

Snap to Midpoint snaps to the middle points of finite lines and ar!s.

• Click on options then snapping grids then change Section to 7.

• Unc#ec" snap to

midpoint then c#ec" snap tosegment

• *oer the mouse cursor over the teal line segment and moe mouse

cursor slowly from left to rig#t.

oti!e how the line segment snaps to 3 different se!tions.

• Unc#ec" snap to segment then c#ec" snap to intersection





• <ocate the violet horiontal and vertical line segments towards the lower

right hand part of the stock #oer the mouse cursor over the intersection.

oti!e it snaps to the interse!tion of the lines. This snap mode wors for the interse!tions of

ar!s0 lines and !ir!les.

• ;ncheck the snap to intersection button and make sure no snap modes

are enabled. Observe the center of the large circle on the left hand side ofthe part. ,hen toggle the snap to center button then re=examine thecenter of the large circle.

+hat you should noti!e is that a !ross4hair appears at the !enter of the !ir!le. This is the snap

point for the !enter of the !ir!le

• >over the mouse cursor over the cross=hair and notice the cursor snaps to

that location

Snap to !enter snaps to ar! and !ir!le !enters. This setting also !ontrols the display of !ir!le

and ar! !enter points.

• Unc#ec" snap to center then c#ec" snap to +uadrant

FeatureMILL2.5D 2&''




• <ocate the large circle and move the mouse cursor around the perimeter of

the circle.

The !ir!le will snap in four pla!es. Snap to -uadrant snaps to the four points on a !ir!le

!orresponding to &0 6&0 '3& and 27&.

• Unc#ec" snap to +uadrant and c#ec" snap to ob,ect

• >over the mouse over all obects in the viewing window.

+hat you will see is that the !ursor snaps to all o%/e!ts in viewing window. This snapping

mode is very useful to snap to any type of o%/e!t in!luding solids and surfa!es.

• Unc#ec" snap to ob,ect and then c#ec" snap to tangent

• Clic" on the line from - points constructor.

1! FeatureMILL2.5D 2&''




• Clic" once on the large orange circle.

• Clic" next on the small yellow circle on the left.

• Clic" again near the top of the small yellow circle on the left! then click

near the top of the yellow circle on the right.





1%serve that Snap to Tangent snaps the point so that the o%/e!t you are !reating will %e

tangent to the o%/e!t you snapped to.

• Unc#ec" Snap to Tangent then c#ec" Snap to Toolpat#

• Clic" on the toolpat#s icon from the steps menu

,he simulation toolbar should appear

• Click on the play icon from the simulation toolbar

• (ig#t!clic" in the viewing window and click isometric

oti!e the green line representing the toolpath for the drilled hole feature.

• elect a line from - points again from the Geometry toolbar and hover

the mouse over the toolpath





1%serve how the !ursor snaps to the toolpath at any point along that toolpath

.ine Constructors

+e will now give a summary of what ea!h items fun!tion on the line !onstru!tor flyout

tool%ar followed %y an e*er!ise.

• Click on the line constructor flyout menu from the

geometry toolbar

- )ts: <ine created with two endpoints.

Connected: $ultiple lines created in succession./ndpoint of one line becomes start point of next line.

*ori/ontal: 1nfinite horiontal line created through a point.

Vertical: 1nfinite vertical line created through a point.

)t& 0ngle: 1nfinite line created through a point at an angle specified in degrees.

Offset: <ine! circle or arc created offset from another. %ew lines have the samelength as original

.ine Constructor '$ercise





• Open .ines1e$ample&fm

• "rom the snapping toolbar click on Snap to Circle2center .

• "rom the line constructor flyout menu select .ine from

Two )oints.

•;se a 8 point <ine to create a line from # to . ,o do this clic" once on thecircle center at 0 then clic" again atpoint 3.

• ;se a 8 point <ine to create a line from # to '.

• "rom the line constructor flyout menu click on

connected.





• %ow use a connected line to create a line from to / to '. Clic" once on

3 then clic" once on ' then once on 4.

• ;se the horiontal line to place a line through C. Clic" on the #ori/ontal

line constructor from the flyout menu

Clic" once at point C to create ahoriontal line

• ;se the vertical line tool to place a line through C. Click on the

ertical line constructor from the flyout menu

Click once at point C to create a

vertical line

;se the &t! #ngle line to make a ?@ deg line through C. Click on the pt5angle line constructor from the flyout menu





Clic" below the #ssistance ar and specify the line angle as 67.

,hen clic" at point C

• ;se the &t! #ngle line to make a 6A@ deg line through C. Clic" below the

#ssistance ar and specify the line angle as 897

,hen click at point C.





• ;se the offset command to offset line #=C=/ 3.@ inches on each side. Click

on the Offset Constructor from the flyout menuClick once on the 1nfinite <ine through 0!C!'

,hen clic" once oneither side of the line

(epeat for the other side of the line

;se the offset to offset line =C=' 3.@inches on each side. 4o t#e same as theprevious step but now offset the infinite line3!C!4 on both sides

Circle Constructors

$elow is a summary of what ea!h item)s fun!tion is on the !ir!le !onstru!tor flyout menu

followed %y an e*er!ise.





• Clic" on the Circle Constructor "lyout $enu from the geometry toolbar

Center! Badius: Creates a circle by clicking on the center and specifying the radiusor dragging the mouse to a radius

Center! /dge: Creates a circle by clicking once on the center then again on theedge

'iameter: Creates a circle with two points with the diameter being the distancebetween the two points

,angent ,wo: Circle created by snapping the circles edge tangent to two obects

8 &ts! Badius: Creates a circle by specifying two points and a radius

A &ts: Creates a circle from three points

Circle Constructor '$ercise

• Open circles1e$ample&fm

• "rom the snapping toolbar enable snap to point!snap to endpoint! snap to centerpoint then snap to







• "rom the circle contructor flyout menu click on 4iameter

1n the s0uare located on the center of thepart Clic" once on the left vertical linesegment

,hen Clic" again on the right vertical line segment

• "rom the circle constructor flyout menu click on

Center5 (adius

• 1n the assistance bar below the display window enter a (adius of :&7<

Clic" once where the perpendicular and vertical linesmeet close to the right hand corner:





• "rom the circle constructor flyout menu clic" on Center5 'dge

Snap to the rectangular corner located toward theupper right hand of the part and Clic" once

,hen Clic" again at the end of the vertical linesegment to the right

• "rom the circle constructor menu clic" on - )ts5

(adius

• /nter a Badius value below the assistance bar as 3.D8@+.

nap to the corner of the geometry segments shown below and clic"

,hen clic" again snapping to the opposite corner shown below





Ehen finished the proect should look like the image below

Fillet Constructors

$elow is a summary of ea!h item)s fun!tion is on the fillet !onstru!tor flyout menu followed

%y an e*er!ise.

• Open fillet1e$ample&fm

• Click on the fillet constructor flyout menu from the geometry toolbar.

Corner fillet creates a fillet in a corner originallydefined by an intersection of lines or arcs.

,wo point fillet creates a fillet in a corner originally





defined by an intersection of lines or arcs.

,hree points defines a fillet by selecting three points! similar to the threepoint circle..

Chamfer creates a chamfer in a corner originally defined by anintersection of lines or arcs.

Fillet and C#amfer Constructor '$ercise

• "rom the part view (ig#t!clic" on stock then .eft!clic" on *ide Stoc".

• "rom the Fillet Constructor flyout menu select Corner Fillet

• elow the assistance bar enter :&69=< for the (adius.





• $ove the mouse close to C then .eft!clic".

• "rom the Fillet Constructor flyout menu select -pt

fillet.

• elow the assistance bar enter :&9>7< for the radius value.

• Create a 8 &t "illet between # and ' shown below by clic"ing once on the

vertical line segment I ! 0 then once on the horiontal line segment passingthrough 0 ? 4.

• elow the assistance bar enter a value of :&=>7<.

• Clic" once on the line segment between 0 ? G and once on the linesegment 0 ? '.





• "rom the fillet fly out menu Clic" on 9 )t Fillet

• Clic" once on the line segment 4!F

then again on the line segment F!G

•

then once more on the line segment '!*

• "rom the Fillet Flyout Menu click on the C#amfer

command"rom the assistance bar enter the width and height of





:&-:<

• $ove the mouse near the line

intersection at point and click

+hen this e*er!ise is finished you should see

results similar to that shown on the right.

0rc Constructors

$elow is a summary of what ea!h items fun!tion is on the ar! !onstru!tor flyout menu


• Clic" on the arc constructor flyout menu from the geometry toolbar

#rc from three points constructs an arc through a start point! edgepoint! and a finish point.

#rc from two points! radius constructs an arc through two points with aspecific radius.

#rc from center! beginning! end constructs an arc from a center point





and given beginning and end points.

,his selection constructs an arc with a specific center and radius withthe starting and ending points determined by angles.

0rc Constructor '$ercise

• Open arcs1e$ample&fm

• "rom the snapping toolbar clic" on snap to point and snap to endpoint

as the only snapping modes checked

• Clic" on the arc from t#ree points constructor from the arc constructorflyout menu

• 1n the upper left hand 0uadrant of the stock clic" once on 0! 3 then C.





• Click on - )ts5 (adius from the arc constructor flyout menu

•

elow the assistance toolbar enter a radius of 8&-7<

• Clic" once at point G then again at point *

• elow the assistance toolbar enter a radius of -<

• Clic" once at point @ then again at &oint I

oti!e that depending on whi!h point is pi!ed first determines the dire!tion of the ar!.

• Clic" on the arc from Center5 3eg5 'nd from the arc constructor flyout

menu





• Clic" once at point '! then at point F and then at point 4.

• Clic" on the arc from Center5 (ad5 3eg5 'nd from the arc constructor

flyout menu

• elow the #ssistance toolbar enter -< for the (adius





Clic" once at point % next at point K and finally at point M

+hen the pro/e!t is !omplete itshould loo similar to the image on

the right.

4imensioning

$elow is a summary of what ea!h item)s fun!tion is on the Dimensioning flyout menu


• Click on the dimensioning flyout menu from

the geometry toolbar

>oriontal creates dimension informationbased on the horiontal axis of the part.

-ertical creates dimension information basedon the vertical axis of the part.





<inear creates dimension information based on the absolute distancebetween two points regardless of the angle of the dimensioned space.

Badius creates dimension information for the radius of the selected obect.

'iameter creates dimension information for the diameter of the selectedobect.

#ngle creates dimension information for the angle between two selectedlines.

,ext label creates a text label entered in the dialogue bar

#nnotation places explanatory text! entered in the dialogue with an arrow of what is being explained

Curvature samples the surface and computes the curvature in twodirections to describe how the surface behaves at the point shown in thedialog bar. ;nlike the other dimensioning tools! Curvature is a real=timerubber=banding effect where you traverse the surface to find the point with thesmallest curvature radius. Fnowing the smallest radius tells you the smallesttool to use to manufacture the surface.

,his dialog helps you extract numbers from the graphics window usingsnap modes and pick filters. ou can then cut and paste these values intoother dialogs.

4imensioning Constructor '$ercise







• "rom the dimensioning flyout menu clic" on Vertical distance

• Clic" once on the horiontal line segment between 0 and 3 ! clic" once

on the horiontal line segment ' ? F then clic" again to the right of thevertical line segment 3!F

• "rom the 'imensioning "lyout menu Clic" on linear distance

• Clic" once at the circle center of circle G ! click again at the arc center

between 4 and '! then click again between the two previous points





• "rom the dimensioning flyout menu clic" (adius

• Clic" once on the #rc at 4 ? ' then Clic" again slightly aboe t#e arc

• "rom the dimensioning menu click on 4iameter

• Clic" once on the circle located at G then clic" again to the left of circle G





• "rom the 'imension flyout menu select 0ngle.

• Clic" once on line segment F?G then click once on line segment C!G then

Clic" again somewhere between the two

• "rom the dimensioning flyout menu clic" on Te$t .abel.





• elow the assistance bar enter the te$t *Eatch " closely+

• Clic" once above the stock outline

• "rom the dimensioning flyout menu select 0nnotation

• Clic" once at point 3 then clic" again towards the upper right hand corner

of the stock outline

• Clic" again towards the upper right hand of the stock





• elow the assistance bar enter the text *urface "inish H 68+ then press

the Create button.

+hen the pro/e!t is finished you should have results similar to those shown %elow.

Clipping

$elow is a summary of what ea!h item)s fun!tion is on the !lipping flyout menu followed %y

an e*er!ise.

•

Click on the clipping flyout menu from the geometry toolbar





"lip( "lip removes a region of a line0 ar!0 !ir!le or !urve. # region is defined as a portion of an o%/e!t

%etween two interse!tion points.

Trim8*tend( !hanges the length of a line or an ar!. Trim8e*tend !an %e used to lengthen or shorten lines andar!s as follows(

Infinite( !hanges the length of a line or an ar!.

Clipping '$ercise

The purpose of this e*er!ise is to %e!ome familiar with the !lipping0 trim8e*tend and infinite

geometry modifi!ation fun!tions. These fun!tions will %e shown on!e then try to mae the

file !lipping e*ample loo similar to the image a%ove

• Open clipping1e$ample&fm

• "rom the snapping toolbar check snap to grid and snap to point only.

• "rom the geometry toolbar Clic" on Clip&





• <ocate the horiontal line segment at 0 then clic" on it once

• <ocate the vertical line segment at 3 then clic" once

• "rom the geometry toolbar click on Trim2'$tend

• <ocate the >oriontal line segment to the left of C and Clic" once

,hen Clic" again toward the vertical line and point across from C.





• <ocate the horiontal line segment at 4 and Clic" once.

,hen Clic" again between and the vertical line

• "rom the snapping toolbar Clic" on Infinite.

• <ocate the &oint near the vertical line segment at point ' and Clic" once

• <ocate the horiontal line segment at point F and Clic" once

+hen finished0 you should have results similar to the image %elow(





Documents

102 - Snapping and Geometry.doc