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I'm currently on the way to design a rigid machine base and as I want everything perfect on my digital model I got some questions regarding dimension- I don't want to buy a projector before beeing sure that everything is as I want it to be.
1.) dimension
On this site the focus of the machine at 100x100mm is around 250mm:
http://www.instructables.com/id/DIY-hig ... r/?lang=de
In my eyes I should switch my projector at highest resolution (1920*1080) and measure the distance so that the projected image has 192*108mm: I would to this on both dead centers of the focus to find the mid-position.
To change dimension and focus on the machine hardware I would make the plate hight-adjustable (app +-30mm).
2.) What type of endstop do you use?
When printing at e.g. 0,03mm layer hight you'll need a VERY good endstop.
As far as I have seen now (I'm developing a lot at RepRap 3D printers) simple switches, opto endstops and Hall-sensors are very common - which one would you prefer?
3.) linear motion
Most of the self built machines and even the commercial machines use dovetail guides. As I want to create my machine open, cheap and buildable by everyone I'm planning to use 16mm rods and fixed guides on top and bottom!?
4.) printbed size
As mentioned I plan to have a printbed of 192*108mm (resolution therefore 0,1mm): has anybody got experience with moving the projector + mirror so that you have e.g. 3 steps of the 108mm side and therefore 192 * (108*3) mm?
Statistics: Posted by IrgendwerAusIrgendwo — Wed Mar 05, 2014 7:18 am
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