Re: 3D DLP Printer, 14″ of travel. April 22, 2014 02:47PM |
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Re: 3D DLP Printer, 14″ of travel. April 22, 2014 08:37PM |
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Re: 3D DLP Printer, 14″ of travel. April 23, 2014 08:52AM |
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Re: 3D DLP Printer, 14″ of travel. April 23, 2014 11:37AM |
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tjb1
Say it focuses nicely at 18", if you place the projector lens 9" from a mirror and then the print surface 9" from the mirror, would that then be in focus?
Re: 3D DLP Printer, 14″ of travel. April 26, 2014 06:14AM |
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Re: 3D DLP Printer, 14″ of travel. April 30, 2014 08:30AM |
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Re: 3D DLP Printer, 14″ of travel. April 30, 2014 01:33PM |
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Re: 3D DLP Printer, 14″ of travel. April 30, 2014 04:14PM |
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Re: 3D DLP Printer, 14″ of travel. May 01, 2014 07:41AM |
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Re: 3D DLP Printer, 14″ of travel. May 01, 2014 08:28AM |
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Re: 3D DLP Printer, 14″ of travel. May 01, 2014 08:33AM |
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Re: 3D DLP Printer, 14″ of travel. May 02, 2014 05:59AM |
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Re: 3D DLP Printer, 14″ of travel. May 02, 2014 07:21AM |
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Re: 3D DLP Printer, 14″ of travel. May 02, 2014 11:02AM |
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Re: 3D DLP Printer, 14″ of travel. May 02, 2014 11:08AM |
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Re: 3D DLP Printer, 14″ of travel. May 03, 2014 12:22PM |
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Re: 3D DLP Printer, 14″ of travel. May 04, 2014 03:50PM |
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Re: 3D DLP Printer, 14″ of travel. May 04, 2014 04:55PM |
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NewKidOnTheBlock
What's the biggest build envelop possible for a DLP SLA printer without sacrificing resolution?
Re: 3D DLP Printer, 14″ of travel. May 04, 2014 08:50PM |
Registered: 10 years ago Posts: 38 |
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A2
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NewKidOnTheBlock
What's the biggest build envelop possible for a DLP SLA printer without sacrificing resolution?
XY resolution is dependent on the size of the projection, and the number of pixels, and the Z axis resolution is determined by the mechanics of how you drive your zed axis. So you have to determine what resolution you require to determine the maximum XY print size.
I'm going to use a DLP projector with a native resolution of 1920 x 1080 pixels with a build platform size of 192 mm x 108 mm, (7.56 inch x 4.25 inch) with a XY resolution of 0.10 mm, (0.00394 in). The resolution increases the smaller you focus the beam. For example if I use a build platform size of 40 mm x 30 mm (1.58” x 1.18”) my XY resolution will be:
X: 40 mm/ 1920 pixels = .021 mm/pixel, (21 micrometer or 0.00082 in).
Y: 30 mm/ 1080 pixels =.028 mm/pixel, (28 micrometer or 0.00110 in).
From what I have read, most homemade DLP-SLA printers have a XY resolution of 0.10 mm, (0.00394 in).
Native resolution: 1920 x 1080 pixels.
Build size: 192 mm x 108 mm (7.56 inch x 4.25 inch).
Length/pixels = resolution.
X resolution: 192 mm/1920 pixels = 0.10 mm, (0.00394 in).
Y resolution 108 mm/1080 pixels = 0.10 mm, (0.00394 in).
If your resolution was 0.50 mm, (0.020 inch) your build size will be:
X-axis: 1920/2 = 960 mm, (37.795 inch).
Y-axis: 1080/2 = 540 mm, (21.260 inch).
Print speed is determined by how many lumens your projector has, and the Z-axis mechanics, it can be as high as 50 mm/hr, but I think most are around 35 mm/hr.
I'm considering 26 mm/hr with a 0.10 mm Z-axis resolution.
One full step (no micro stepping) of the stepper motor advances the Z-axis:
.02623 inch/200 steps/revolution = .00013 inch, (0.00330 mm).
That's over kill on the Z-axis resolution, but I'm attempting to design a dead lift separation which will require a lot of force. This is being considered because I don't want to distort the object with tilting, sliding, or stair stepping the vat to separate the object from the vat bottom. I'm hoping I can flex the glass enough to initiate a peeling action. I'm considering using very thin Gorilla-glass.
The important factors in choosing a DLP projector are its native resolution, lumens, and contrast ratio.
Re: 3D DLP Printer, 14″ of travel. May 05, 2014 03:50AM |
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NewKidOnTheBlock
How does the xy resolution on a DLP/SLA print compare to a similar size FFF print
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NewKidOnTheBlock
Is it possible to maintain high xy resolution on a DLP/SLA printer if one chooses to increase their build plate up to 20"x20"?
Re: 3D DLP Printer, 14″ of travel. May 06, 2014 04:01PM |
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Re: 3D DLP Printer, 14″ of travel. May 06, 2014 07:53PM |
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Re: 3D DLP Printer, 14″ of travel. May 07, 2014 02:43AM |
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Re: 3D DLP Printer, 14″ of travel. May 07, 2014 04:45AM |
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Re: 3D DLP Printer, 14″ of travel. May 07, 2014 07:16AM |
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Re: 3D DLP Printer, 14″ of travel. May 07, 2014 08:36AM |
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Re: 3D DLP Printer, 14″ of travel. May 08, 2014 04:59AM |
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Re: 3D DLP Printer, 14″ of travel. May 08, 2014 05:28AM |
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NewKidOnTheBlock
What is the required ansi lumens rating does a DLP projector need to be in order to be able to cure resin?
Re: 3D DLP Printer, 14″ of travel. May 08, 2014 09:08AM |
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Re: 3D DLP Printer, 14″ of travel. May 08, 2014 12:26PM |
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gmh39
Kinda curious, but do any of you know how the strength of resin prints compares to FDM prints?