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  • Author Author: Workshopshed
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A bit of 3D Printing

Workshopshed

Whilst Hans was coding Matilda was fine tuning the mechanism and finishing the housing. When the magnet housings had been tested their positions had put Hans and Matilda a bit far back into the cottage. The magnet carriers were redesigned so that the holes were towards one end, that would move the positions forward by about 7mm and the coverings for the holes turned out not to be needed so those were removed to reduce printing time.

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Due to their simple design and shape they printed first time with no issues.

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However not everything was so simple. After quite a few failures the spacers for supporting the Yún and shields were printed successfully by lying the models down, reducing the printing speed and printing at 1/2 speed for the first few layers. Also a brim was added as the footprint was quite small.

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The final challenge for the printing was two buttons for the top panel. These went through several iterations and failed prints but eventually a design was created that fitted the panel and printed successfully. The small bobble on the stalk stops the buttons falling out when you turn the panel upside down.

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The key lessons learnt here were not to have features too close to the edge, the printer can handle thin slots but not thin solid, adding a brim helps give a crisp edge and when printing the first layer don't make it too thin and print it slowly.

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There was a little clean up of the wifi logo needed but the power button was simply a case of removing the brim.

 

Source code and models: https://github.com/Workshopshed/EnchantedObjects/tree/master/Mechanics

 

Next: Enchanted Objects Design Challenge - Locking the doors

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  • in reply to balearicdynamics

    There are tools that can do these two as two operations.

     

    If you were making a lot of these it would be a case of looking at the time for setup of machines and for the operation time. I believe that one of the techniques used is to keep the item in the chuck and swap the chuck onto a different machine to reduce setup time. Another technique might be to use a hot stamp to emboss the logos into the buttons.

     

    I think that the wood cutter might say, "if you only have a hammer, everything looks like a nail".

  • in reply to Workshopshed

    Andy, we should exclude the point relative to the quantities. This is another song and need a totally different approach but we are living in the world of "one single signed piece" image (aka prototypes, or /art/ operas) image

     

    What I mean is that as I am going ahead in several discussions on this community about what is the case to 3D print and what to mill, until now I have not found a real absolute need. Also in this case anyway there is a easier technique (always well tested by me too): it is the same of milling double side PCB: mill bottom side then the top side.