Slightly more complex grippers can be modelled using a separate BASEPLATE layer. Create a layer named BASEPLATE in the DXF file, and draw some closed POLYLINE shapes in that layer. Then this layer can have separate Z extrusion limits specified by the BASEPLATEEXTENT key.
Click on Related when a drawing is being edited.
Click on the Layers menu
The Layer editor dialogue (shown below the centre) is displayed. Here you can add new layers, rename them, and set colours and line styles.
In the drawing, clicking on an entity allows you to change the layer of that entity (see image above right). This selector appears only if there are multiple layers in the drawing.
After editing the drawing using these tools, save the drawing in DXF Format.
Note: For this gripper, the wrist extends from Z=0 to Z=23. Then, the base plate (green) extends from Z=23 to Z=40, as indicated by the BASEPLATEEXTENT key. Finally, the actual gripper plate (holding the suction cups) extends from Z=40 to Z=63, as indicated by the PLATEEXTENT key.
Note that the gripper plate also has some hexagonal holes in it.
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