Page Comparison

Step 1: Prepping Laser for use

1. Before calibrating the crosshair the following tasks should be completed:

   1. Load a sample that can be marked easily with the laser (Si-wafer, aluminum, stainless steel)

   2. Ensure the desired wavelength in the Carbide User App is selected and the laser output is enabled and open, as seen in Figure 1

   3. The process type must be in Galvo mode Changing Process Type - Galvo, Stages, IFOV - SOP

Step 2: Making A Grid of Lines in AutoCAD

1. In ProcessPower, click the ‘AutoCAD’ tab at the bottom of the screen as seen highlighted in yellow in Figure 2.

   1. Enter the following values into the text fields:

      1. Lines number: 11

      2. Lines spacing: 0.1

      3. Lines size: 1

      4. Z Min.: -1

      5. Z Max.: 1

   2. Click the “Generate drawing on AutoCAD' button as seen highlighted in blue in Figure 2.

2. The OptecCAD window, as seen in Figure 3, will now have a new layer populated that’s named ‘layerBET'.

   1. Inside of the ‘Layers List’ section of the OptecCAD window, ensure that the ‘0' layer is unchecked and the 'layerBET’ layer is checked, as seen in Figure 3.

   2. Select the ‘layerBET' layer and change the ‘Laser Power' parameter to 30, as seen in Figure 3. Also, verify that the ‘Type’ parameter has the same harmonic as the one selected in the Carbide User App. For example: Figure 3 has the UV/343nm wavelength selected for the ‘Type’ parameter, and in Figure 1, Harmonic #3 is selected in the 'Presets’ section, which is a match.

Step 3: Configuring ProcessPower and Running a Process

1. In ProcessPower, zoom to level 4 and adjust the focus. Once the sample is in focus, change the zoom level to the most appropriate zoom level when working on the sample.

2. Jog the laser to an open area on the sample for making the grid of lines

3. Zero out the X, Y and Z axis values by clicking the buttons as seen highlighted in Figure 4

4. Click the play button icon, as seen highlighted in Figure 5. This will open up the ‘Processing Options’ window. Ensure that the ‘No Correction’ and ‘Repetitions by Layer’ options are selected, that no rotation is applied and click the ‘Start Processing’ button. Wait for process to complete.

Step 4: Analyzing Laser Markings and Performing Calibration

1. In Figure 7, you can see that the thinnest line is 5 from the left or 7 from the right, which is not the center.

2. In the OptecCAD window, select the ‘layerBET’ layer and find the ‘LINE’ object in the ‘Objects List’ that came out the thinnest on your sample. In this case, it’s the line that’s 5 from the left or 7 from the right, as seen selected in Figure 8.

3. Take note of the 'LINE' objects 'Z' parameter value, which in this case is -0.2, as seen highlighted in Figure 8. This will be the offset applied to the Z axis for calibration.

4. In ProcessPower, at the top of the window, click ‘Options’ → ‘Software Configuration’ as seen highlighted in Figure 9.

5. The ‘System Configuration’ window will pop up. On the left hand side, under ‘General Configuration', click ‘Laser’. Then click ‘Carbide’ under the ‘Laser’ menu, click the wavelength that was used under the ‘Wavelength’ menu, and finally click ‘DefaultLens’ under the 'Lens’ menu, as seen highlighted in Figure 10.

6. Now add the -0.2 offset value to the ‘Offset’ text field highlighted in blue, as seen in Figure 11. This changes the offset value from -8.565 to -8.765.

7. Click the ‘Save’ button highlighted in yellow, a seen in Figure 11, to apply the offset, then close the 'System Configuration' window.

Step 5: Verifying Calibration

1. Repeat Step 3.

2. When the program is complete the thinnest line should be in the center, which is the 6th line, as seen in Figure 12. If the thinnest line is still not the center line, repeat step 4, followed by step 3 until the thinnest line is in the center of the grid.

3. The crosshair is now calibrated for the selected wavelength using Galvo, Stages and IFOV process types