Originally Posted by
Lennings
Hi Greg,
The dimensions of your part are influenced by the Precision settings that you made in the Operation parameters.
DeskProto will project a pattern of toolpaths over your geometry, and for each XY position of that path calculate the Z-value. That means that the distance between the toolpaths (one of the Precision settings) will influence the accuracy of the result. A simple example: when machining a 10.5 mm cube with a toolpath distance (stepover) of 1 mm, the result can never be 10.5: DeskProto will make it 11.
Even for waterlines the Precision settings play a role, as these decide the grid size: all calculation are done on a rectangular grid, called the Z-grid - further see the Help on that subject.
So for a ring that needs an exact diameter it is better to use 2D toolpaths, as in DeskProto these are more accurate. For 3D toolpaths you can improve the precision by choosing better Precision values.
Lex.