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Messages - ech3dt

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General / Re: 3D printing issue - wall thickness
« on: October 24, 2016, 02:05:23 PM »
 If your model contains thin walls it's a good idea to make them a multiple of your nozzle width (0.4mm for the UM2). If you make the walls thinner than a single line width there's a chance that cura will remove it from the model completely if it thinks it can't properly print it. Cura does a few tricks to be able to print both thinner and thicker lines than 0.4mm but if possible it's better to keep to multiples of 0.4mm since the nozzle was designed to print that width.

Also keep in mind that a sloped wall that measures Xmm perpendicularly to the surface will actually be wider when sliced in the horizontal direction.

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Face and Body Scanning / Re: Basic Camera Rig for 3D Printing
« on: October 24, 2016, 02:00:53 PM »
I'm using the industry standard aluminum pipe size and spacing, so it should be possible to combine these printed parts with commercially available parts and/or rigs, though I have only tried that once with a part for a friends rig.

All the parts are designed in OpenSCAD and those source files are included below, in case you want to modify the parts to work with other pipes, differently sizes screw, etc.


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General / Re: Draw 3D Polylines
« on: April 07, 2016, 03:47:12 PM »

Solution:

    Start 3D polyline command ("3DPOLY").
    Use the "Point Object" transparent command ( 'PO ).
    Click on the first point and then on any subsequent points to create the desired line.
    The resulting 3D polyline will have vertices with elevations that match the selected points.

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General / Re: 3D Printing file standards? pre-flight checklist?
« on: January 27, 2016, 07:41:00 AM »
following tips will may help you.

Beginning with the End - Where does a typical desktop publishing project begin? Dumb question? Perhaps not. For all practical purposes, the information gathering process starts at the end, with the printing process. If you're new to desktop publishing, this article will explain some of the technical aspects of design you may not have considered. If you're an old pro, it might remind you of some of the production steps we (I include myself here) sometimes forget.

Checklist to Success - Prevention is better than cure, and nowhere more so than in desktop publishing. Learn to preflight your design documents before they cause trouble down at the bureau or presses.

Printing Checklist - Printing is a complex, highly technical process that must be carefully planned and executed to get the desired results. Many things can go wrong, and even small problems can cause delays and cost overruns.

Design Guide For Print : Submitting Files For Print - We've learned that by streamlining the prepress process we are able to pass significant savings onto our customers. Our prepress guidelines also let us bypass common pitfalls associated with preparing digital artwork for print such as embedding fonts, and unlinked images.

Environmentally Preferrable Printing Checklist - Some organizations develop simple checklists to assist purchasers in designing environmentally preferable print jobs. These checklists help organizations save money, reduce waste and protect the environment. A copy-ready checklist has been provided for you to use as is, or modify to fit your organization's needs.

Free Digital File Preflight Test - Here are some of the file errors that commercial printers look for when you send them a file...it is good for you, the graphic designer, to know what to look for so you can save on any extra costs.

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General / Re: 3D printing a 3D model from Photoscan
« on: January 25, 2016, 09:23:18 AM »
Rendering three-dimensional information of a scene from optical measurement is very important for a wide variety of applications such as robot navigation, rapid prototyping, medical imaging, industrial inspection, etc. In this paper, a new 3D measurement method based on mesh candidate with structured light illuminating is proposed. The vision sensor consists of two CCD cameras and a DLP projector. The measurement system combines the technology of binocular stereo vision and structured light, so as to simplify the process of acquiring depth information using mesh candidates. The measurement method is based on mesh candidates which represent the potential depth in the three dimensional scene. First the mesh grid was created along the direction of axes in world coordinate system, and the nodes were considered as depth candidates on the surface of object. Then each group of the mesh nodes varying along z axis were mapped to the captured image planes of both cameras. At last, according to the similarity measure of the corresponding pixel pairs, the depth of the object surface can be obtained. The matching process is between the pixels in both camera planes corresponding to the spatial mesh candidates. Aided by the structured light pattern, the accuracy of measurement system improved. Appending the periodic sawtooth pattern on the scene by structured light made measurement easier, while the computational cost did not increased since the projector had no need to be calibrated. The 3DS MAX and Matlab software were used to simulate measurement system and reconstruct the surface of the object. After the positioned cameras have been calibrated using Matlab calibration toolbox, the projector is used to project structured light pattern on the scene. Indicated by experimental results, the mesh-candidate-based method is obviously superior in computation and accuracy. Compared with traditional methods based on image matching, our method has several advantages: (1) the complex feature extraction process is no longer needed; (2) the epipolar constraint is replaced by mesh candidates so as to simplify stereo match process; (3) the candidate selection strategy makes unnecessary the process of transformation from two dimensional coordinates to three dimensional coordinates.
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thanks for information

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General / Re: Photoscan exterior orientation
« on: September 21, 2015, 02:58:38 PM »
thanks for information.

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