Evaluation of Your Group Assignment for Computer_Controlled Cutting Week
Since the group work for this week is documented in your page, I comment on it here.
GROUP WORK
It is nice to see that all of you contributed somehow in documenting the group work. The documentation of your group work is really good and reflects how you did lots of efforts to learn about kerf as well as laser parameters. However, some minor modifications are needed as explained in the following:
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"press the joystick while pushing it upward or downward to adjust the distance between the material and calibrator."the distance between the material and the focus lens.
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"NOTE: In the combined mode, any contour with line widths less than 0.02 mm will be processed as “cutting” while any lines beyond 0.02 mm will be engraved."Please rephrase this sentence. Because it still cuts through using some values slightly bigger than 0.02 mm. And I am not sure if it cuts with all of the line widths smaller than 0.02 mm! But I know that it cuts through with 0.02 mm and also with slightly bigger or smaller than 0.02 mm. You can mention that in Fab Lab Oulu we consider the line width of 0.02 mm for cutting through and for engraving the line width should be thick enough for example 0.05, 0.1 mm and etc.
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"On the contrary, when the focus has been set too low, the parts that are supposed to be engraved may be cut too deep and hence becomes detached."The parts are detached because they have the line width of 0.02 mm and they were supposed to be cut through. So it was not the result of the low focus. However, low focus has affected the engraving result. As you can see from the image, 'too low focus' is different for example as I can see from the image, it has resulted in a lighter engraving compared to the 'too high focus'. In the original file, the color of the square in set black (RGBA:0,0,0,255), so normally it should result in a darker engraving than what came out after lowering the focus. The picture of the piece with 'focus in place' is showing the wrong side and unfortunately the engraved area is on the other side of the piece, otherwise you could compared the engraving result of focused and defocused laser!
If I understand your kerf picture correctly, I believe that kerf will be yellow + blue Or the blue part itself which is the laser beam size. If yes, please modify the picture.-
Please replace the picture of kerf drawn by me with the new version that I put here for you. The one that you uploaded has some typos.