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  • Author Author: fvan
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Sci Fi Your Pi: PiDesk - Project Update #4

fvan

Previous posts for this project:

 

 

Project Update

 

Had some fun with stepper motors today! I've been setting up the Gertbot and building a first prototype for the screen lift mechanism.


The Gertbot is really easy to use, it was up and running in a matter of minutes. To know how, check out this post: Sci Fi Your Pi: PiDesk - Guide: Stepper Motors with Gertbot

 

The first prototype of the screen lift makes use of two stepper motors and threaded rods, as described in my application. The end result will be different in the sense that the mechanism should be completely hidden and only the screen should come out. The current prototype has threaded rods all the way to the top side of the screen, which should not be the case in the final mechanism. suggested using a car window mechanism (thanks Mark!). I'll be running that track in parallel, figuring out where to get the parts first.

 

Another thing is that the current prototype is rather slow, requiring about 20 seconds to bring the screen up. An idea to increase the speed without having to change the electronics is to use threaded rods with a bigger pitch. The rods I'm using now have a 1mm pitch. I suppose that using rods with let's say a 1.5mm pitch, would reduce the lift time by a third. Does that sound right ?

 

In case you haven't checked out the other post, here's the lift prototype as it is now:

 

 

Until next update!

Parents Comment Children
  • in reply to fvan

    There was once a time ... A long long time ago image

     

  • in reply to balearicdynamics

    Nice!! What happened in the 3 years since then ? Is it still in use, have you been upgrading, ... ?

  • in reply to fvan

    No this one was a very initial prototype that I used mainly for self- teaching and seeing what was the things to do. Then I have bought some heaviest parts (e.g. more powerful motors), and keeping the same principle now it is evolved in an assembled one based on initial chinese architecture with a lot of improvements. That is the 210x250 mm mill machine I am using for PCB and mechanic prototyping.