The way that we do this in CWS is by projecting a grid, with each square having 10mm sides.
To start, connect your projector to your computer. The projector should extend off of the main screen, as shown below:
However, there's something wrong with this picture! Let's go over to CWS:
Notice the red box, where we see that DISPLAY2 is set as our "Configured Display". This is correct -- it means that CWS will automatically send slices to the projector.
The problem here is that the "Output Resolution" (Green Box), we have 800 width and 600 height. This doesn't match our build size (Orange Box)!
A brief explanation here is that we want 1 pixel on the projector to equal .1mm on the build plate. So we want our resolution to be 1024 x 768 (Multiply that resolution by .1 to get the build plate size!)
Right now, if we try to calibrate our grid, our measurement will be wrong. So let's change our resolution to the correct one!
Hit apply, and go back into CWS.
Notice that our "Output Resolution" (Orange Box) is still 800 x 600... even though our "Available Display" is 1024x768! We still need to add that display to our "Configured Display", and hit "Apply"
That's better... now all of our boxes are the same values! Let's move on to the grid!
First, let's get a 10mm grid. Go to .
Here are the settings I used. The only thing you may need to change is your paper size:
Once you're ready, click "Print"
In the print dialogue, make sure that "Fit to Page" is unchecked. This will ensure that the grid is the correct size:
Now that you've printed it out, you may want to cut out a square that's approximately the size of the build plate. I also darkened the lines a bit:
So now the goal is to make the projected lines match the 10mm grid lines. To make this happen, we only have to change the height of the build plate.
Here the build plate is a bit too far away ,and the projected grid is too big:
Now we moved the build plate up a little bit, and have found that sweet spot where the projected lines almost perfectly overlap the printed lines:
That location is where we want our build plate and resin level to be at in order for it to be printing at the correct scale. I like to mark this spot with a pencil on the linear rail:
Before any print, simply return the rail to this position. Easy!
Statistics: Posted by PomeroyB — Mon Oct 27, 2014 7:31 am
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