| | Magsimus Deluxe Tutorials -> Interacting Objects -> Specifying Motion |
Motion is defined for groups. The group moves as one whole with its coordinate frame. The relative locations and orientations of the components of the group in its coordinate frame are preserved during motion. Let us define motions for the groups "Probe holder" and "Biased field source." The motion for the probe holder will be a rotation about the group of electrically energized nonmagnets, while the biased field source will undergo a two-stage translation motion. Display the Group specification dialog for the probe holder (by double clicking its entry in the Design Manager) and select the Motion tab (Fig. 10). This tab is used to specify motion for the group. Group motion is defined as an arbitrary sequence of motion legs . Each leg describes a translation and/or rotation of the group. By defining a variety of motion legs in this way, the group can be made to undergo complex motions during a simulation. Legs are numbered starting from 1 onwards. The resulting motion follows sequentially from the defined legs. One motion leg will be required to define the rotation of the probe holder. Fig. 10. Motion tab of the Group specification dialog. Press the Add Leg button to create this leg. Enter the following inputs: In the frame Angular velocities of rotation (Deg./Step) , enter: The entered specifications define the rotation of the group by 20 increments of polar angular coordinate of the group, at the rate of 18o per step. This results in rotation of the group through 360o. Display the Group specification dialog for the bias field source (by double clicking its entry in the Design Manager). Switch to the Motion tab and define the following two motion legs (start each definition by pressing the Add Leg button): 1. Number of motion steps = 20 In the frame Translation velocity in system , enter: 2. Number of motion steps = 20 In the frame Translation velocity in system , enter: When finished, press the OK button to exit the Group specification dialog box. The first motion leg defines a translation motion that occurs in 20 steps along the direction given by the angular coordinates (measured in the system coordinate frame), and will proceed at a rate of -40 nm/step. The second motion leg occurs in 20 steps at a rate of 50 nm/step along the direction specified by the entered angular coordinates. We will now preview the motions we specified. To preview the motion, press the Show Motion button in the main program system-display tool bar (button 10 in Fig. 7). The probe and permanent magnet will move according to the motions defined for them, and then return to their starting positions.
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