Week 3 - Journal

our assignment this week was design a 3D pen/pencil holder and use a PRUSA printer.

Therefore, I started to search about cool and multi-tasking holder that could fit with me.

i found this design and and this two columns inspired me to do three columns to put in them my pens and pencils and design a thin column to put in it my plasters.

1. sketch from the origin on XY plane a center rectangle with a dimension of 100*95 mm.

2. sketch inside the rectangle 2 circle with diameter 40 mm and 35 mm.

3. sketch in the second half of the rectangle polygon with 6 sides and a radius of 20 mm.

4. sketch in z-x plane fit point spline to be the pass of sweep of the polygon.

5. sketch in the rectangle circle with diameter 25 mm to be base of plasters

6. sketch on the last circle another circle with diameter 10 mm to be column for plaster

7. choose a construct and offset plane of XY plane with dimensions 85 mm.

8. draw on this plan another rectangle with dimensions 90 mm * 85 mm.

9. go to preferences and choose design then active (Allow 3D sketching..)

10. sketch a line to connect between the two rectangles.

after i finished my design i found my design will take a 9 hours so i become for fusion 360 to try reduce some material so i use extrude cut

1-i choose the face then select extrude and change operation to cut.

2-make the previous step to all faces.

convert Sharpe edges to smooth for better use.

1. choose the fillet feature and select the edge of the circle with 1 mm.

2. choose the fillet feature again, and do the previous step to all edges .

there are two wayes

1. right click and choose save as mesh then change format to STL.

2. choose from file export then select stl .

cura:

1. open STL file.

2. change the setting to suitable for the requirements of the assignment.

• adjust dimension to make z 60mm,x 61 mm,y 64.5 mm..

• make the layer height 0.3 mm.

• Use 10% infill .

• check on Adhesion to make a skirt.

3. slicing design to see the time (1h 26 min ).

4. Numbers of grams 20 g.

5. save file as .gcode to upload it 3d printing machine.

3D printed:

1. I transfer my G-code to SD card and put it into the machine

2. I cleaned 3D printer bed using alcohol

3. choose my G-code file

4. i watch the first layer to make sure that all things works well

5. it took 1 hour 29 minute.

problem:

The problem was that the lower base is not a single base and there is a gab between its layers ,so that can cause a problem while fabricating because they must be a single piece.

solution:

The solution is that i went to fusion 360 and edited the design by making clear to the lowest base and made extrude 5 mm to the carrier base of the parts and I want to thank Eng. Amr because he suggested this solution for me.

Each week over makes the final project come closer but the difference here is the new skills that I got. Now, I could use other features for building 3D design except Extrude like the loft, revolve and sweep which enhance me to make the design of the final project easier, soft, and cool!

Moreover, dealing with the PRUSA 3D printer makes me aware of how the product consists of many layers and how to fit the requirements such as reducing the time by using Vasa mode which really helps me to reach the final product clearly.