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Pwdr / Pwdr-Model-0.1

A powder substrate rapid prototyping machine
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Pwdr Building Questions #6

Open SungwonJ opened 12 years ago

SungwonJ commented 12 years ago

Hello Alex,

How are you doing? I have been quite busy recently now finally have some time to work on the machine.

I have assembled the machine successfully although I had to find similar pulleys and shafts because some of the parts are not available in the US. Pwdr is a beautiful machine! Anyone else also built the machine!?

Now I am playing with the printer. I noticed several issues.

Questions:

  1. I am testing the speed of the roller, because a wrong speed tends to roll the underlying printed layer of powder away. Any good suggestions?
  2. Also I noticed that you upgrade the GUI and support slicing STL files. Congratulations! I was only able to convert bmp files no greater than 2000 pixels due to the max array size limitation of Arduino. Any work-arounds? Do I need to add a SD shield? Both GUIs seem to support larger bmp files or STL slices, but I couldn't load them into Arduino sketches due to the array size limitation(2000 elements).
  3. After applying 19V voltage to C6602A constantly,(more than 1 minute) the cartridge gets unstable and starts spray in a dispersed manner. Do you have the same problem? Now I am buying a switch to cut off the power supply to the cartridge while nozzles are not printing.

Future Recommendations:

  1. Reset buttons at the both ends of X and Y axis. Just like RapRep.
  2. Relax the requirements of power supplies to cut cost. I am now using a 24V 5A power supply and it works fine.

Once again, thank you for sharing this great project!

Eddie J