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CNC-Calc v2 Tutorial 42D construction with mirroring
W h e n R e l i a b i l i t y M a t t e r s
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Introduction
CNC-Calc v2 Tutorial 42D construction with mirroring
This is a step-by-step tutorial that demonstrates how the 2-dimensional part,
illustrated above, can be drawn in CNC-Calc. Since the part is almost symmetrical
around the Y-axis only one half needs to be drawn. The other half emerges from
mirroring. This is one of many ways in which this part can be created.
This tutorial demonstrates use of the following functions.
Draw a circle with a given radius defined by its center. Draw a horizontal line defined by endpoint and length.
Draw a vertical line defined by endpoint and length.
Draw a polar line defined by end point, angle and length.
Draw a line tangent to a circle under a given angle.
Draw a line tangent to two circles.
Trim a part to another part.
Connect and fillet with a given radius between two parts.
Mirror parts about a given line.
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Before you start
The first thing to do before drawing a new part is to set the menu parameters. Start
Cimco Edit v5 and select Setup > Show Toolbars. Make sure all toolbars are
displayed as shown in the image below. Toolbars can also be displayed or hidden byright-clicking on the toolbar area.
To make a new drawing
you must click on CNC-
Calc and then select New
Drawing.
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The following screen should now be displayed.
Note: If you hold the cursor over an icon a short description of its functionality will
appear.
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Draw the geometry
Draw a horizontal line defined by endpoint and length
1. Click on in the toolbar and enter the values
specified in the image (0, 0, -40).
2. Click on , bottom right, to approve the
command.
Note: If you want to undo a command click on
in the toolbar.
Draw a vertical construction-line
1. Click on in the toolbar and enter the following values.
a. Start Point Of Line X = -65
b. Start Point Of Line Y = 0
c. Line Length = 180
2. Click on the to approve the command and insert the line.
Draw a circle with radius 12.5 defined by its center
1. Click on in the toolbar and enter the values
specified in the image: (0, 167.5, 12.5)
2. Click on to approve the command.
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Draw a line defined by one endpoint and polar coordinates (angleand length)
Activate all snap-functions by clicking the Enable All Snap Types in the CNC-Calc
menu.
1. Click on and change the default values to the following:
a. Line Angle = 120 (180 - 60)
b. Line Length = 50
2. Move the cursor towards the right endpoint of the horizontal line. The cursor
will snap to the endpoint as it reaches the end of the line.
3. Left-click on the point to transfer the point coordinates to the Polar Line
dialog to the right.
4. Click on to approve the command.
Adjust the geometry to the screen
1. Click on in the toolbar or press the mouse wheel. This will adjust the
drawing view to fit the geometry.
2. Make more room around the construction by clicking a couple of times on .
Zooming in and out can also be done using the mouse wheel.
3. By clicking you can specify your own drawing view by dragging out a
zoom window.
4. Move the drawing view by moving the mouse while holding down the right
mouse button.
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Fillet and trim with radius = 6
We want to make a curve with radius = 6 and trim the angled line to the left
construction line.
1. Click on in the toolbar and enterFillet Radius = 6.
2. Click on the center of the angled line and then on the construction line a bit
over the line intersections.
3. All the possible solutions will now appear on the screen. Simply point and
click on the one that indicates the correct fillet.
4. In the same way we now click on the center of the lower horizontal line and
then on the angled line. The possible curves appear (Radius = 6) and we
simply select the arc you wish to keep.
Draw a vertical construction line
1. Click on in the toolbar and enter the values
specified in the image
2. Click on to approve the command.
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Draw a line tangent to a circle with a given angle and length
1. Click on in the toolbar and enter the values
specified in the image
2. Click on the arc in the fillet between the left
vertical construction line and the angled line.
3. The possible solutions appear on screen. Select
the top right solution.
Trim two elements at intersection
1. Click on in the toolbar.
2. Click on the upper half of the left arc. Then click on the lower half on the
latest of the angled tangent lines. Note that for arcs trimming is executed by
extending the half of the arc that is selected.
3. Trim the angled line to the right construction line.
Draw a polar line
1. Click on in the toolbar and change the default
values in the dialog to:
a. Start Point Of Line X = -30
b. Start Point Of Line Y = 82.3942
c. Line Angle = 135
(90 + 45 =135)
d. Line Length = 50
2. Make sure Snap to endpoints is on.
3. Move the cursor over the right endpoint of the
trimmed 45 line.
4. Click when the cursor snaps to the point endpoint position is updated in the dialog.
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Fillet and trim with radius = 8
1. Click on in the toolbar and enterFillet Radius = 8 in the dialog.
2. To create a curve between the two angled lines we click on the center of the
lines.
3. From all the possible solutions select the one to keep.
Fillet and trim with radius = 10
1. Click on in the toolbar and enterFillet Radius = 10 in the dialog.
2. Create a curve with radius = 10 and trim the topmost of the angled lines withthe left vertical construction line. Click on the angled line and then on the
upper half of the left vertical construction line.
3. From all the possible solutions you select the one to keep.
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Draw a line tangent to two circles
1. Click on in the toolbar
2. Click on the arc with radius = 10 and then click on the topmost middle circle.
3. From all the possible solutions you select the one to keep.
Trim two elements at intersection
1. Click on in the toolbar.
2. Click on the upper half of the left arc. Then click on the lower half on the
latest of the angled lines.
3. Click again on the line and then on the topmost right part of the circle with
radius = 12.45.
Delete the construction lines
1. Click on in the toolbar.
2. Click on the two unwanted vertical lines
Draw a vertical construction line
1. Click on in the toolbar
2. Click when the curser snaps to the right endpoint
(0,0) of the lowest horizontal line.
3. EnterLine Length = 200 in the dialog.
4. Click on to approve the command.
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Trim one element
1. Click on in the toolbar
2. Click on the left half of the topmost curve and then on the latest constructionline.
Mirror elements using a mirror line
1. Click on in the toolbar
Notice the comment, which has appeared in the bottom left corner of the
screen. In this case: Select the mirror line to mirror about.
2. Click on the vertical construction line.
3. Click and hold the left mouse button to draw a window, which covers all the
elements.
4. Click on in the toolbar to center the drawing area around the elements.
Delete the construction line
1. Click on in the toolbar.
2. Click twice on the vertical construction line (the construction line has been
mirrored about itself).
Fillet and trim with radius = 12
1. Click on in the toolbar and enterFillet Radius = 12 in the dialog.
2. Create a curve with radius = 12 and trim the two 45 lines to the right. Click
on the two angled lines.
3. From all the possible solutions you select the one to keep.
4. Click on in the toolbar
5. Delete the unwanted arc.
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Join two elements
1. Click on in the toolbar.
2. Click on the two halves of the topmost circle.
3. Click on the two halves of the lowest horizontal line.
Note: These actions might be unnecessary for the drawing, but if you later on
wish to create toolpaths, based on the geometry it is an advantage. Otherwise two
blocks will appear in the NC-program.
4. Your screen should now look as the one below.
Name the file and save it
1. Click on Files Save As in the top menu.
2. Give the file a name: CNC-Calc_Tutorial_4. The file will automatically be
given a file extension (.cdd).
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