Week 4

Group Assignmet page

Do you know PUBG? This is one of the most popular games in recent years, and I'm one of the many enjoying it.

I'm going to make a logo on it using a vinyl sheet.

The tool I used was Inkscape. After opening an image in Inkscape, right-click on the image and it will be called a bitmap trace. I did update without touching other settings.

Then, the original and the black and white image are created by overlapping.

The images I used were too big to print, which greatly reduced the size. And What I will use is a bitmap that is reduced in size.

Then save it with dxf extension and open it with Inkscape,

This outline is created. After confirming that the contour was generated, I printed it on the vinyl cutting print.

FC22250A-60VC is the printer I used, the vinyl sheet was held by using a masking tape.

The logo I used was a letter, so I made a rectangle a little bigger than the size of the logo to make it easy to take off and paste.

Attached to my laptop.

I think that the result is very well-chosen, and I like it.

The next thing to do is laser cutting.

Prior to laser cutting in earnest, I don't know how to use a vernier calipers, so I learned to use the instructor.

It can read second decimal point.

I measured the mdf and measured it to 2.8mm.

Then cut the cad to cut the laser. It is a thickness measuring device that is made of CAD, which is made to measure even 0.05mm difference.

I set this up when doing laser cutting practice.

But it wasn't cut, my guess is that I adjusted the speed too fast.

So I tried to cut it again at 50, but I did not cut it.

So the instructor advised me to adjust the speed to 10 and cut it.

I changed the settings and proceeded.

The left side is not cut and the right side is the setting changed. Slow down the speed, there was definitely not a part that was not cut.

I wrote it with a pencil because the text created by fusion360 wasn't recognized,
so I temporarily used a pencil to reduce the thickness.

Temporarily write down each length with a pencil and measure the length with a caliper.

I tried to measure 2.55mm, but my width was measured differently than I thought, and there was an error of 0.2mm, resulting in 2.75mm.

So I tried to correct the error of 0.2mm.

The settings are set up similarly.

The 2.5 mm section with kerf was measured again.

I measured the kerf applied, and the desired value came out.

However, the kerf may vary depending on the laser output and material, so it should be noted.

The left isn't the result of applying kerf, and the right is the result of applying kerf.

I had difficulty adjusting the output and speed, but I used it several times and it was easy to do.

And, what was difficult with the laser cutter was
how to apply the kerf value to get the desired shape and numerical value without errors.

I used a card board.

Since I did not know the kerf value for the first time to write the card board, I made a sample to know the kerf value.

The sample was made of squares, and the width of the square was held at 2 cm and printed.

I measured with a caliper and found 20.4mm.

The error is 0.4mm, and when divided by half, the width of the laser is 0.2mm. The kerf value is 0.2 mm

Sample design download

The thickness of the card board is 4.3mm.

Based on previous experiment, kerf on cardboard 4.5t was 0.2mm.
So I drew parametric design in fusion360.
I decided to make a lamp shade.

Then print the sample to see if it goes well.

The fan shape is printed with the cuff applied as desired,
but the legs miscalculate the distance between the hole and the fan.

I corrected the error, made the leg part, printed it, and tried fitting it.

There was a little tight feeling, but the card board was a paper, so it gave me a little strength.

I confirmed that it was well, so I printed the remaining three legs.

The previous ones were designed by adjusting the numerical values one by one, so I decided to design a proper parametric design and decided to make shapes similar.

Press MODIFY in the middle of the toolbar and click Change Parameters at the bottom,

I put the numbers in the following window.

After that, I put the variables that I wrote in advance to the numerical value, and completed the parametric design.

Completed.

You can download my work here
zip file download