Practical use of 3D printer

Finally, a practical use of my 3D printer Prusa I3.
Was sunday morning, when a drama happened on my kitchen.

My girl was warming a cup of milk, suddendly, the microwawe stopped to function.
A gloomy silence filled the kitchen. the girl looked at me desperately and a scream broke the sound barrier.

" it is broke"
followed by a series of misfortunes similar to the invasion of locusts ( how can I warm my breakfast, my soup, the boiled potatoes ) .
STOP, I will fix the microwave - was my only statement.
While she was looking which electronic store were open on Sunday, I spent about half hour to open the microwave box, (I hate the torx screws, not having the correct screwdriver :-) )
Once I opened the patient, I have discovered that all was OK ( or , I supposed that ), but .....
the knob.....was only the knob used for time programming.... the center hole was stripped and did not more maintain the position.

IDEA - I can replicate a similar knob with my 3D printer.
Immediately on my computer, launch Design Spark mechanical and draw the my simple knob version.
Very easy and quick design

Then, save the G code file on my Prusa , used a 100 % infill to have a strong and reliable knob.
About 40 minutes and ....dadadadada.... an " economic" but functional knob was ready.

I will prepare a more complete version, just to avoid any claims from her

Some parts printed with Prusa I3 & Design Spark Mechanical

Here we can see some parts that I printed with Prusa I3 DIY 3D printer .
All these have been designed with Design Spark Mechiancal, a free 3D CAD, based on Space Claim CAD.

At the beginning I have some issues on have a perfect circle, but, the first failure was due to the low resolution on STL files.

The second image is  not a perfect circle, I will publish the second version that is better and we can see the differences

A new adjustable endstop for Z axis

Just finished and tested a new adjustable endstop for Z axis
Now it is possible to adjust the endstop with only a screwdriver ( wrenches are not necessary ) 
Turn the M4 bolt to adjust the zero position.
All the parts have been designed with Design Spark mechanical, then adjusted with NetFabb ( to remove the incorrect mesh ) and then printed with Repetier / Slic3r.

Here the complete vision

a better image of the parts

board plate that attach the original Prusa Z endstop plastic

plastic part that sustain a M4 nut, developed with Design Spark mechanical

Here the same part, adjusted with Netfabb

Prusa i3 rework ready

After about 2 months, using the free time on evening ( and night ) , I can say that my Prusa I3 rework is finished and I'm pretty satisfy of the final result.
I made some small changes from the original design,  in order to improve :
-  the Z axis zero regulation
-  to give some  light /illumination
-  add a blower for the PLA

Some pictures , to show the Z axis zero regulation :

this is the Z axis zero regulation

below the blower and the illumination .

I have used a series of LED smd, soldered below the fan :

Fan and LED light

Below, the LCD board with the SD card socket :

On the next days, I will post some other info.

See you