HELLO!! welcome back to another blog!! This time we were actually given a task to be done by the end of our holidays. we were supposed to 3D print an object which can't be made subtractively. Don't worry I have documented the whole process, so you will not get missed out on this amazing experience with me.
I used different softwares such as CURA and Fusion360 to help me with making my product come alive. This assignment was actually difficult as defining the meaning of subtractive confused me. Hence I made 2 different models using Fusion360 first, so that I would have a back-up plan just in case. I did encounter a problem. When I was 3D printing my first product, my lecturer came to me and mentioned that my product could actually be made subtractively. But luckily I had a back up plan. Hence I decided to use that model and I did the necessary work to be done so my product can be 3D printed.
Take a look at the final product I came up with!!
DOCUMENTATION(FUSION360)
1) I created a sketch, followed by putting in all my dimensions for my product. As for my bottom part, I only added half the actual dimension. after this I proceeded to finish sketch.
2) I used a function called 'revolve' so that my product will come to shape. you have to press the create button, several options will flow down. Among that options press 'revolve'. make sure to click on the sketch, so the selected sketch can be revolved.
This is how it should look like after revolving.
3)Now we will proceed to fillet the bottom circle as well as the top circle. You would have to press the function 'fillet' which is under the category of modify. i fillet the bottom circle first by 2mm as shown below.
4) Now for the top circle, there are 2 sides you would have to fillet. one is the outside and the other is the inside. As this does not have a cover it needs to be fillet on both sides. You would have to press the function 'fillet' which is under the category of modify. I fillet the inside first by 2.5mm followed by the outside by 1.5mm.
5) This is my final product done on Fusion360. Take a look at this beauty.
1)The moment Cura opened, I uploaded my file into the software as well as choosing the appropriate printer which I am going to use to 3D print. as for me the printer used was Creality Ender-3. This is how it looked like after I did the necessary work.
2) I followed by making adjustments such as generating support as well as supporting the overhang angle. by pressing the product, there will be options at the side. Hence by pressing settings, there will be several options. I pressed the relevant options for myself which are generating support as well as supporting the overhang angle.
3) I proceeded to slice this, to see how long it will take to be 3D printed. I had a time limit of up to 2 hours, hence it had to be printed within that time limit. I rotated my product so that it could be made faster. My product was made within 1hr 4mins, which was within my time limit.
In my opinion this 3D printed product is not able to be made subtractively. as u can see the sides are actually more slanted rather than being straight. Hence due to this, it will be harder to be carved out using any tools. If it is being carved out, it will take a very long time to be carved out in that shape.
This product's main function is to keep rubber bands, rubber band holder. The rubber bands will be placed on the outer side. This way rubber bands can be found easily.
REFLECTION
From this activity, i have learnt more about 3d printing as well as making things subtractive. At first I got confused with the meaning of subtractive, I thought it meant not being able to be made using laser cutting. but it also included carving it out using tools. Due to my mis interpreation, i had to redo my drawing on fusion360 again. but luckily i had a back up plan. if i didnt have a back-up drawing, i would have took much more time to actually redo the whole thing from scratch. time would be very constraint.
Since young, I actually had a great desire to make a product using a 3D printer. It looked really easy to do. but there were actually several softwares to go through as well as getting the code so the machine is able to 3D print. it was more complicated than what my younger self thought it would be like. But regardless it was a very great experience, fulfilling one of my young wishes.
I also have learnt that additive manufacturing is more cost-efficient than subtractive manufacturing. I also learnt about the supports to be used for 3D printing, so the model does go out of shape during printing. There also a need of over hang when the angle is above 45 degrees, every printer has different overhang angles.
In my second try I tried to actually move the product around which actually helped me in reducing the time taken for it to be printed. This was an amazing and fruitful experience to 3D print something i can use. The product and the printing process is shown below.
This is the embedded version of my product on Fusion360 :
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