First Release: September 2018 (KN)
In order to properly machine a part it is important to set the work coordinate system (WCS) properly in Fusion 360. This tutorial runs the user through how to set this WCS using the B-table and vise, along with the square part that is produced in the ‘First Part Tutorial.’ A user can use any part that they are milling, and it would be set in the same way just using a different part for reference.
Setting the WCS
The first part of a setup is selecting the work origin and orienting the Work Coordinate System (WCS). To set up the WCS within the Fusion CAM environment, select the WCS dropdown and “Select Z axis/plane & X axis” next to orientation.
Two pieces of geometry will need to be selected to complete the “Orientation” field, one for the Z Axis and one for the X Axis. To do this, select the box next to the “Z Axis” labeled “Nothing”, then select geometry (a straight line) on the vise perpendicular to the moveable axis of the jaw and parallel to the work table. Repeat the operation for the X Axis, selecting a feature perpendicular to the work table. When finished users should have a WCS that looks like the image below. If you need to change the directions of the axes, use the “flip _ Axis” check boxes to flip them.
The orientation of the B axis is flat or (perpendicular) to the spindle of the Pocket NC when homed. This needs to be reflected by the WCS. On the Pocket NC, the Y Axis moves the table up and down this must be reflected in the setup for the output code to work with the machine. The positive Y direction of the WCS should point straight up from the the B table.
Next, you will select the origin of the machine within the model. The origin of the machine is represented by a point in space 0.839 inches off the surface of the table at the center of rotation. This point varies slightly from machine to machine and should can be changed from the downloaded model to match each specific machine.
In the Setup menu change the Origin type to “Selected Point.” Then select the top point of the B table offset sketch.