DCC10012 ENGINEERING DRAWING AND CAD

4. 3P (3 Points)
Draw a circle based on three points on the circumference

Command: circle or C ↲
CIRCLE Specify center point for circle or [3P/2P/Ttr (tan,tan,radius)]: 3P ↲
Specify first point on circle: Specify a point (1) ↲
Specify second point on circle: Specify a point (2) ↲
Specify third point on circle: Specify a point (3) ↲

5. TTR – Tangent, Tangent, Radius
Draw a circle with a specified radius tangent to two objects

Command: circle or C ↲
CIRCLE Specify center point for circle or [3P/2P/Ttr (tan,tan,radius)]: Ttr ↲
Specify point on object for first tangent of circle: Select a circle, arc, or line ↲
Specify point on object for secind tangent of circle: Select a circle, arc, or line ↲
Specify radius of circle <current>: Enter a value ↲

6. TTT – Tangent, Tangent, Tangent
Draw a circle tangent to three objects

Click from Bar Menu (Draw) ⟶ Pull down menu (Circle)
Command:
_circle Specify center point for circle or [3P/2P/Ttr (tan,tan,radius)]: _3p specify first point on circle:_tan
to specify a point (1) ↲
Specify second point on circle:_tan to specify a point (2) ↲
Specify third point on circle:_tan to specify a point (3) ↲

RECTANGLE COMMAND

Command: -rectang or rec ↲
RECTANG Specify first corner point or [Chamfer/Elevation/Fillet/Thickness/Width]: Specify a point (1)
Specify other corner point or [Area/ Dimension/Rotation]: Specify a point (2)

or
Specify other corner point or [Area/ Dimension/Rotation]: @100,50↲ ENTER

POLYGON Command

Command: Polygon or pol ↲
POLYGON Enter number of sides <4>: Enter a value or press ↲ ENTER
Specify center of polygon or [Edge] : Specify a point (1)or enter e (for edge) ↲
Enter an option [Inscribed in circle/Circumscribed about circle]<I> : Enter I or C or press ↲ ENTER
Specify radius of circle: Specify a point (2) or enter a radius value

Inscribed in circle Circumscribed about circle

Edge
Specify center of polygon or [Edge] : E ↲
Specify first endpoint of edge : Specify a point (1)
Specify second endpoint of edge : Specify a point (2)

HATCH Command

Choose Type and Pattern of Hatch
If nessesary, Change Value of Pattern Scale
If nessesary, Change Value of Pattern Angle

Select ⟶ Add: Pick points
Pick internal point or [select objects/remove boundries]: choose internal point (1) ↲

Choose internal point Result

Boundary of object must be close

OFFSET Command

Command : Offset or o ↲
Specify offset distance or [Through/Erase/Layer] <current>: Specify a distance, enter t, or press ↲
ENTER

Side selected object offset

Offset distance
Creates an object at a specified distance from an existing object
Specify offset distance or [Through/Erase/Layer] <current>: Specify a offset distance
Select object to offset or [exit/undo] <exit>: Select one object
Specify point on side to offset or [exit/multiple/undo] <exit>: Specify a point (1) or (2) on the side of the
object you want to offset
Select object to offset or [exit/undo] <exit>: ↲ (to end command)

Through point object offset

Through
Creates an object passing through a specified point
Specify offset distance or [Through/Erase/Layer] <current>: enter t (for through)
Select object to offset or [exit/undo] <exit>: Select one object
Specify through point: Specify a point (1) through which you want the offset to pass
Select object to offset or [exit/undo] <exit>: ↲ (to end command)

COPY Command

Command: Copy or co ↲
Select object: select object and press ↲ ENTER
Specify base point or [Displacement /mOde] < Displacement>: Specify a point (use osnap)
Specify second point or <use first point as displacement>: Specify a next point
Specify second point or [exit / undo] <exit>: ↲ ENTER (for end command)

Draw object Select object using Specify base point Specify a point
crossing method (use osnap)

Also can makes multiple copies:

Multiple copies

MOVE command

Command: Move or m ↲
Select object: use an object selection method and press ↲ ENTER to finish
Specify base point or [ displacement] < Displacement>: Specify base point (1)
Specify second point or <use first point as displacement>: Specify a point (2)

Object selected move object object moved

ROTATE Command

Command: Rotate or ro ↲
Select objects: use an object selection method and press ↲ ENTER to finish
Specify base point: Specify a point (1)
Specify rotation angle or [Copy/Reference] ] <0>: ENTER an angle value↲ ENTER

Select object Specify base point (1) ENTER an angle value

MIRROR Command

Command: Mirror or mi ↲
Select object: use an object selection method and press ↲ ENTER to finish
Specify first point of mirror line: Specify a point (1)
Specify second point of mirror line: Specify a point (2)

Object selected
(crossing method)

Erase source object? [Yes/No] <N> : Enter y or n, or press ↲ ENTER
Result:

Yes No
(Original objects deleted) (Original objects retained)

ARRAY Command

Command: Array or ar ↲
Select object: Select object to array ↲
Key in data in dialog box
Rectangular array

Command: Array or ar ↲
Select object: Select object to array ↲
Specify center point of array or [Base point/Axis of rotation]: Select base point (center of circle) ↲
Select grip to edit array or [Assiosiative/Base point/Item/Angle between/Fill angle/ROWs/Level/TORate
items/eXit] <eXit>: ↲ ENTER

Key in data in dialog box
Polar array

Select object to array Select center of circle Result after key in data in dialog box

ERASE Command

Command: erase or e ↲
Select objects: type All (to erase all object on screen) or use an ‘object selection’ to erase and press ↲
ENTER when you finish selecting the objects.

Using pointing devise
(Choose object)

Move the cursor from right to Move the cursor from left to
left across objects right across objects

TRIM Command

Command: Trim or TR ↲
Select cutting edges...
Select objects or <select all>: Select object by use an object selection method and press ↲ ENTER
Select object to trim or shift-select to extend or [Fence/Crossing/Project/Edge/eRase/Undo]: Select an
object to trim ↲

Select objects Select objects to trim Result

Select objects Select objects to trim Result

EXTEND Command

Command: Extend or Ex ↲
Select boundary edges ...
Select object or <select all>: Select object by use an object selection method and press ↲ ENTER
Select object: ↲ ENTER to finish selection
Select object to extend or shift-select to extend or [Fence/Crossing/Project/Edge/eRase/Undo]: Select an
object to extend (1) and (2) ↲

Selected boundry Select objects to extend Result

FILLET Command

Command: Fillet or f ↲
Current settings: Mode = TRIM, Radius = 0.0000
Select first object or [Undo/Polyline/Radius/Trim/Multiple] : Use an object selection method to specify
point(1)
Select second object: Use an object selection method to specify point(2)

Selected objects Result
(Radius = 0.000)

Command: Fillet or f ↲
Current settings: Mode = TRIM, Radius = 0.0000
Select first object or [Undo/Polyline/Radius/Trim/Multiple] : Type R↲ (to change fillet radius)
Specify fillet radius <0.0000>: Enter a fillet value↲
Select first object or [Undo/Polyline/Radius/Trim/Multiple] : Use an object selection method to specify
point(1)
Select second object: Use an object selection method to specify point(2)
Command: ↲ (to repeat same command)

(radius greater than 0)

CHAMFER Command

Command: Chamfer or Cha ↲
(TRIM mode) Current chamfer Dist1 = 0.0000, Dist2 = 0.0000
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: Specify point (1)
Select second line or shift-select to apply corner: Specify point (2)

Object selected Result
(Dist1 and Dist2 = 0.0000)

(TRIM mode) Current chamfer Dist1 = 0.0000, Dist2 = 0.0000
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: d (for distance)
Specify first chamfer distance <0.000>: Enter a value (d1) ↲
Specify second chamfer distance <0.000>: Enter a value (d2) ↲
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: Specify point (1)
Select second line or shift-select to apply corner: Specify point (2)
Command: ↲ (to repeat same command)

Object selected Results (Distance 1 & 2 greater than 0)

PLOT Command

Command: plot ↲
Follow the steps below:

1. Select the printer / plotter

2. Set the paper size and number of copies
3. Specify the plot area using display, extents, limits and window styles
4. Specify a plot scale or choose a ‘ fit to scale’
5. Tick ‘center the plot’
6. Select drawing orientation – portrait or landscape

7. Preview the plot drawing before click OK.
8. Finish.