I have butchered the LCD display to remove UV damaged part. I have used UV strip lighting along top edge close to screen components.
I managed to figure it out with a lot of surfing the various 3D boards.
It is a combination of favourable growth in the direction of the light (top of LCD screen) combined with stress-induced alteration of the 'green' resin due to the peel mechanism and slight misalignment of the print platform in the y-axis, causing peel to start in one corner, rather than at one edge, resulting in 'bulging' at the lowest point due to compression.
I will be doing further trials to confirm this, nevertheless your input is greatly appreciated....thank you
Statistics: Posted by Smudge — Fri Apr 17, 2015 11:43 am
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If you are indeed using an LCD, what LCD panel? Light source?
LCD printers do not suffer from X-Y scaling issues, your X-Y dimension is determined by the actual image size on the LCD. The X-Y should not change as its fixed by the LCD.
Post up some pictures of your setup.
Statistics: Posted by Phife — Thu Apr 16, 2015 3:08 pm
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Initial thoughts are a combination of light behaviour through the various screen layers, progressive residual temperature increase generated by screen electrical components and bias toward light source (edge-lit currently).
Statistics: Posted by Smudge — Thu Apr 16, 2015 11:14 am
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Currently trying to develop a low-level light bottom-up printer.
The images from the rudimentary prototype are distorted in very repeatable ways: -
- Initially layers are small and increase in area to a constant X-Y geometry.
- Cube templates taper to a point (not consistent directionality) in the X-Y plane, which also confers with an overhang in the Z-plane at this point.
I have read a lot of information on this website, which has helped me immensely and am very aware of the skill base that exists. I would be immensely grateful if you very knowledgeable and sharing folk would offer your expert advice and opinion on this issue.
Thank you so much for your time.
Statistics: Posted by Smudge — Thu Apr 16, 2015 8:56 am
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