To help you to get started with CharlyGRAAL surface functions, we suggest that you carry out two guided exercises. Remember to record the file and save it regularly. (You can call it " Ex5.CAD ").

6.2 First 3D exercise: drawing a plate.

For this first 3D exercise you will use the " revolution surface " function

Once the CharlyGRAAL CAD module is open, give the dimensions of the following blank: - X = 120 - Y = 120 - Z = 4

In fact, for this example, the dimension of the " Z " axis is of no importance because you will be drawing above the blank.

As in the previous examples, arrange your screen with two windows, attributing the perspective view to the small window and activate the " realistic rendering "(window menu)!

You will now draw the profile.

Click on " polyline " then on " digital entry absolute tab "(keyboard shortcut = " enter ")

Enter the absolute coordinates: - X = 60 - Y = 60

Validate the position by " OK " then click with the mouse.

Click on " Digital entry relative tab "(keyboard shortcut = " Ctrl + Arrow ext ") then enter the following relative coordinates: - X = -32.5 - Y = 0

Validate the position by " OK " then click with the mouse.

Renew this operation three times with successively the following values:

- X = -7.5 - Y = 10

- X = -10 - Y = 5

- X = -5 - Y = -5

Once the last positon is validated, give a right click to stop the construction.

You are now going to make the rounded shapes on the plate profile.

Make a frame Zoom on the profile.

Click on : " link " then " fillet "

Enter : 4 mm in the field " fillet radius " then validate by " OK ".

Click on the low angle of the profile.

Renew the operation on the other two angles with a radius of: 2 mm.

You will now delete the left edge of the plate after the fillet; but to be able to carry out this operation, you will first have to dissociate the entities of the profile that have been associated automatically.

Select the profile, then click on " ungroup " in the " edit " menu

Then select the left edge of the plate before the rounded part and delete it.

The profile is now complete, and you are going to join it before applying to it a rotation of 90° in relation to the " Z " plane.

Select the profile with a frame selection, then click on " join " in the " edit " menu.

After activating the icon " 3D "     , click on " rotation "(contextual menu).

Enter: 90° and select: " show the center or rotation axis ".

Validate by " OK ".Click two points on the axis of the " X " at the level of the profile base.

The rotation takes place at the second click.

The profile is now finished and positioned, and you are going to be able to generate the surface around a " Z " axis.

Click on " page zoom "

Click on " surface " then on " revolution surface "

Enter a rotation angle of: 360° then click on : " OK "

Click on the rotation point (right end of the profile) by clicking once on the left button then immediately on the right button.

The surface is now created and the plate is represented in realistic rendering if you have activated this function.

The plate is now finished. If you wish to carry out the 3D machining of this exercise, you must have a license for the FAO GRAAL3D software and in this case, refer to the training manual for this software. If you have not acquired this licence, contact the sales department of the Charlyrobot company: