Since you have already done exercises: 1, 2 and 3, we will not go into the details of each manipulation that you have already done.

In the first window, choose the material «Plexiglas». Don’t change part origin and raw dimension.

Validate with «OK».

Select all the objects to be engraved: graduations, texts and the viewfinder.

In order to facilitate this selection, make a global selection, then using the function «selection minus» you unselect non-concerned objects.

Make a global selection by clicking on the key «space bar» (keyboard shortcut).

Once the whole drawing is selected, click on the icon «selection minus».

Now, unselect the inside and outside contours as well as the central point.

To unselect the point, make a window around the point. Pay attention to not unselect the segments of the viewfinder.

Once the objects to be engraved are selected, apply to them their machining trajectories.

Click on the right mouse button to call the contextual menu, and then click on: «describe the machining» or press on the key «enter» (keyboard shortcut).

Select tool N°5, engraving tool 3.17mm, and click on «following».

In the following window: «machining trajectory» enter: 0.20mm in the field «depth» and click on «following».

Since this sequence is an engraving, don’t make an outlining or pocket cycle.

Enter the machining depth: 0.2mm

The following window «machining parameter» indicates the values that will be applied to this sequence.

Validate the sequence by clicking on «Finish».

The engravings being now parameterized, you are now going to select the central point in order to create its sequence.

•Make a selection «Frame» around the central point (be careful, don’t forget to reactivate the icon «selection» if you have used «selection plus» and «selection minus» functions ).

Click on the right mouse button to call the contextual menu, and then click on: «describe the machining» or press on the key «enter» (keyboard shortcut).

Select tool N°8, drill 1mm, and click on «following».

In the following window «machining trajectory» click on «cut»; which will automatically indicates the thickness of the raw material (a depth of 2mm), then click on «following».

The following window «machining parameters» indicates the values that will be applied for this sequence.

Click on «extricate cycle», then click on «Finish».

Now, you are going to parameterize the cuts starting by the inside cut.

Select the inside line.

Click on the right mouse button to call the contextual menu, then click on: «describe the machining» or press on the key «enter» (keyboard shortcut).

Select tool N°14, double-edged tool 2mm, and click an «following».

In the following window: «machining trajectory», click on «cut»; witch will automatically indicates the thickness of the raw material (depth of 2mm); click on «contours» then on «inside», then click on «following».

The following window «machining parameters» indicates the values that will be applied for this sequence.

Validate the sequence by clicking on «Finish».

Now, parameterize the outside cut.

Select the outside line.

Click on the right button to call the contextual menu then click on «describe the machining» or press the key «enter» (keyboard shortcut).

Click on the right mouse button to call the contextual menu, and then click on: «describe the machining» or press on the key «enter» (keyboard shortcut).

Select tool N°14, double-edged tool 2mm, and click an «following».

In the following window: «machining trajectory», click on «cut»; which will automatically indicates the thickness of the raw material (depth of 2mm); click on «contours» then on «inside», then click on «following».

The following window «machining parameters» indicates the values that will be applied for this sequence.

Validate the sequence by clicking on «Finish».

Now you are going to create a machining sequence to make a (chamfer) on the central hole. Therefore you will have to apply a second machining sequence on the point. As it is forbidden to apply several machining on the same object, you are going to travel from CAM to CAD, and then from CAD to CAM in order to regenerate the drawing lines and therefore be able to apply the second sequence on the point.

Click on the icon «CAD»

You go back to CAD.

Click on the icon «CAM».

You go back to CAM and all the drawing lines have been regenerated.

Make a selection «Frame» around the central point (be careful not to accidentally select other objects because all the drawings have been regenerated).

Click on the right mouse button to call the contextual menu then click on: «describe the machining or press the button «enter» (keyboard shortcut).

Select the tool N°10, drill 3.17mm and click on «following».

In the following window: «machining trajectory», enter a depth of 1mm, and then click on «following».

The following window «machining parameters» indicates to you the values that will be applied for this sequence (if, on your version, the speeds are not parameterized, put: 8000 Rpm for the spindle speed and 1mm/s for machining speed ).

Validate the sequence by clicking on «finish».

The machining parameterizations are now finished; you are going to make different controls:

(Machining report, sequences).

You can also perform rapid and/or realist simulations.

Once the controls and simulations are performed, you can start the machining by using the same procedures as for the other exercises.

From the version 3.20 the pilot asks for the first tool; on the preceding versions, only tool changes are indicated.