Lesson 4 – Getting started with
In this lesson, you will be introduced
to some commands that will speed up the
drawing process, as well as some tricks to enhance the visual appeal of your
drawings
Commands:
bhatch (boundary
hatch), array.
The bhatch
command
The bhatch command can be used for things
such as concrete cross-sections, bricks,
grass etc. by telling bhatch to use one of a variety of hatching patterns.
In the first
example, we will boundary hatch a rectangle to look like a piece of balsa.
Invoke polyline as follows:
pline <enter>
Left click somewhere near the middle of the screen.
@3.5<0 <enter>
@3.5<90 <enter>
@3.5<180 <enter>
c <enter>
This will draw a closed ployline that has sides measuring
3.5.
Start bhatch and select the pattern properties tab. Set
the scale to 0.5, angle to 155. Click
the pattern tab and use the vertical scroll bar to find and select wood1 as
the pattern. Next,
select the boundary tab and click the 'select area >' button.
 |
Click inside the polygon
you drew, and press the 'enter' key. If the boundary hatch properties box in in the way to see the hatching, move it to one side. If the hatching looks OK, click the OK button. If not, you can change the values again for scale, angle and pattern. This is just a simple example of how boundary hatch can be used. There are other patterns of wood available in IntelliCAD, but we wouldn't be drawing wood with knots on our plans now would we ? |
Hatching can also be used to represent a piece we want to cut out of timber
or metal,
rather than just the outline. An example of this is shown below. It is the engine
mount for
the converted Ryobi motor. Another place where this is useful
is for showing threads. In
this case, threaded rod again for the converted Ryobi.
 |
 |
The array command
This one is of particular use if you need to replicate
something around an axes. Start off
by drawing a cross (45 degrees) with a circle on one of the arms like this:
 |
Then invoke the array command. You are asked to 'select entities to array'. Click the circle once. You are then asked if you wish to add any more entities. Since this is the only one, press 'enter'. You are asked next for the type of array. The options are rectangular and polar. The default is polar. Press the 'enter' key to accept the default. Next we need to specify the base or centre of the array. Select the intersection of the two crossed lines with an int. snap code. We then need to specify an angle between the items or the number of items in the array.The default is number of items. Enter the number '4' and press 'enter'. |
 |
Next we are asked for an angle. The default is 360 degrees. Press 'enter'
to accept the default. Do we want to rotate the entities around the array
? The default selection here is yes. Press 'enter' to accept the default |