About Material z
The rectangle according to the following table.tabpropertyvalue nameinputGeometryx (μm)-7.5 x span (μm)5 y (μm)0 y span (μm)0.4 z (μm)0.1 z span (μm)0.2MaterialmaterialSi (Silicon) - PalikAdd the tapered section of the high index waveguidePress on arrow on the COMPONENTS buttonand select EXTRUDED POLYGONS from the pull-down menu. This will open the object library window.Select ISOSCELES TRAPEZOID from the list and press the INSERT button.Set the properties of the isosceles trapezoid according to the following table.tabpropertyvalue nametaperPropertiesx, y (μm)0 z (μm)0.1 materialSi (Silicon) - Palik z span (μm)0.2 y span (μm)10 lx top (μm)0.4 lx base (μm)0.08Rotationsfirst axisz rotation 1 (degrees)90Add the low index polymer waveguidePress on arrow on the STRUCTURES buttonand select a RECTANGLE from the drop-down menu. Set the properties of the rectangle according to the following table.tabpropertyvalue nameSiONGeometryx (μm)2 x span (μm)16 y (μm)0 y span (μm)3 z (μm)1.5 z span (μm)3Materialindex1.5 override mesh order from material databaseselected mesh order3Graphical renderingoverride colour opacity from material databaseselected alpha0.3By setting the mesh order of one material to be larger than that of another material, the material will have lower mesh priority in the regions where objects overlap.Select the model analysis group in the Objects Tree. Click on the zoom extent buttonon the side view toolbar to zoom the view ports around the completed structure.Add EME Solver and monitorsPress on the arrow on the on the SIMULATION buttonand select the EME SOLVER from the drop-down menu. Set the properties according to the following table.tabpropertyvalueGeneralbackground index1.465 wavelength (μm)1.5EME setupx min (μm)-8 number of cell groups3 cell group definitionSee table below display cellsselected y (μm)0 y span (μm)5.5 z (μm)0.5 z span (μm)7Set the properties of the table in the CELL GROUP DEFINITION section of the EME setup tab of the simulation region object according to the following table. group spans (μm)cellssubcell method131none21019CVCS331noneThe number of cell groups is set to 3 for the three distinct regions of the structure, the input waveguide, the tapered region, and the output waveguide. In each cell group we can specify the span of the region the cell group will cover, and the number of cells to use in the cell group. The number of cells corresponds to the number of locations where the modes of the device will be solved.In the cell group regions where the cross section of the device does not change (ex. the input/output waveguide regions), it is not necessary to use more than 1
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Plasma Process Overview¶ CNC plasma cutting is an excellent way to process sheet metal quickly and easily. In order to ensure successful cutting and quality parts from a CNC plasma cutter, users must have a good understanding of plasma cutting process. 1. Safe Height / Retract Height At rapid clearance height the machine moves to the XY pierce position and begins the material touch-off. 2. Material Touch-Off The torch moves down until the torch tip makes contact with the material and the "Ohmic Probe" signal reads "Active" in Mach4. The Z height is set to Z = 0. 3. Pierce Start The torch is moved up to the programmed Pierce Height. The torch fires. This starts the programmed Pierce Delay time to allow the arc to fully pierce the material. 4. Pierce Complete When the arc transfers to the material, the torch will send an "Arc Okay" signal triggering the Delay After Arc OK which inhibits Torch Height Control (THC) motion. After the Pierce Delay the arc has fully pierced the material and cutting motion can begin. 5. Cut Start The torch is moved to the programmed Cut Height. XY Motion starts. 6. Main Cut After the Delay After Arc OK time, THC may be active IF enabled by the g-code AND the Anti Dive rules allow it. Ohmic Probe Overview¶ The Ohmic Probe senses the top surface of the material in order to set a local Z axis reference for pierce and cut heights. The circuit sends the Ohmic Probe Active signal to Mach4 when an electrically conductive path between the Ohmic Ring (on the torch) and the ground wire (on the material clamp) is completed. Operation Note The Ohmic Probe system is only used to set the initial pierce and cut heights. It is NOT involved in Torch Height Control. Plasma Software Overview¶ There are three pieces of software necessary for proper use of the Avid CNC plasma system. Ensuring that all software is installed and correctly configured prior to attempting any cutting operations is critical to your success. 1. CAD Software This program is used to draw
