3D Scan Using Minolta & GeoMagic

 

I. Turn on Minolta


  1. •  Remove lens cover and laser cover1 

  2. •  Place black poster behind platform2

  3. •  Flip switch on minolta to turn on

  4. •  Wait some time to initialize

  5. •  when Prompted "Please open Laser Barrier" Hit any key3  

  6. •  Open GeoMagic software

  7. •  Navigate to Plugins → Konica Minolta 901 Plugin v9.0

  8. •  when Prompted  "Do you want to calibrate the turntable axis"
       Select No

  9. •  Check minolta is displaying “Remote”4


    1 medium lens is best

    2 minolta does not capture black very well 

    3 already did with first step

    4 if not, reboot computer


lens

laser

black

poster

Remote

II. Calibrate Minolta


  1. •  Click “Show Live Image Window” in the left side Scan panel

  2. •  Click “Enable Streaming Video” to see if capturing

  3. •  Place chart on the platform (nicely centered)

  4. •  Uncheck “Enable Streaming Video”

  5. •  Click “Update Color Image”

  6. •  Wait, then Click “Update Range and Color Image”

  7. •  Check image to see the chart is colored within spectrum.

  8. •  Click Calibrate Axis under Turntable panel


  1. •  when Prompted "Please set the chart on the turntable" Click ok

  2. •  Check to see a TurnTable Axis in your 3d environment

III. Test Scan of Piece


  1. •  Remove chart and Place piece on the platform

  2. •  Back in the “Show Live Image Window”, Click Enable Streaming Video

  3. •  Click “Update Color Image” and Click “Update Range and Color Image”

  4. •  Check image colored within spectrum, Aim for middle depth to be yellow

  5. •  If images look like example 1 or example 2, then autofocus didn’t do a
        good job, so now need to manually set the focus

  6. • Uncheck autofocus, change the “Distance” up or down incrementally
       (by 10’s) then Click “Update Range and Color Image”

  7. •  Repeat until piece is colored nicely within spectrum like example 3









    Example 1 (Bad)                                Example 2 (Better but Bad)                         Example 3 (Good)

  8. •  Click “Scan” button for a test scan

  9. •  Check that scanned image looks good, okay if there is outer noise

IV. 360 Scan of Piece


  1. •  Under the Turntable panel

  2. •  Current position should be 0.0

  3. •  Set “Rotation Step” to 45 degrees

  4. •  Set MultiShot for “Scan Mode”


  1. •  Click Next, the platform will rotate 45 degrees and take another scan

  2. •  Repeat until “Current Position” does a full 360

  3. •  once completed, Click Ok button at the very bottom

  4. •  the left panel should display a list of scans and a solid piece (w/ noise + holes) 











  1. • Navigate to File → Save As a “Wrap File .wrp”

V. Cleaning Scan


  1. •  Click and Drag to highlight a noisy region then hit delete key

  2. •  Repeat until no visible noise

  3. •  make sure to rotate around using middle button of mouse

  4. •  to deselect a highlighted area, right click and select clear all

  5. •  Select all scans on left panel by holding down shift

  6. •  Navigate to Points → Reduce Noise, Click Apply and Ok

  7. •  Select all scans, Navigate to Points → Merge, Click ok

  8. •  Select the merged file at the bottom of scan list

  9. •  Navigate to Polygon →  Clean

  10. •  If desired, you can reduce the noise again on the merged and cleaned file









               

                              before  cleaning                               after cleaning


  1. •  SAVE



VI. Filling in Holes

From the front view, the piece can seem deceivingly whole,
but once you rotate, you will notice holes everywhere.


  1. •  Navigate  to Polygon → Fill Holes

  2. • Under Fill Method, select the second “Partial Fills” option

    (
    Note: the first all “Fill” option is a little dangerous in that if there are complex and large areas it can stall the computer forever or make some areas really flat and not nicely curve)

  3. •  Define the desired boundary by clicking on the outline your first, second, and third points for the boundary  







                      
    before fill hole                          after fill hole

  4. •  Click Ok at the bottom to save this filled hole

  5. •  Repeat filling holes until all are sealed

  6. •  Under “View Point,” Step Through Holes can auto direct
    you to holes

VII. Filling in Holes - Advanced (Smooth Boundaries)

VIII. Filling in Holes - Advanced (Close w/ Planes)

  1. •  Navigate to Boundaries → Relax

  2. •  Select boundary to relax

  3. •  Increase (or decrease) the iteration to make the white boundary become smoother

  4. •  Click execute and Click ok









                                before                                                      after


  1. •  Navigate to Polygons → Section by Plane

  2. •  Change “System Plane” to “Line”

  3. •  Select the line tool

  4. •  Select and Drag a straight line over desired region












  5. •  Rotate the piece and Move the “Position” until at a good intersection










  6. •  Click Intersect plane, Click Delete section, Click Close intersection, Click Ok



IX. Saving out .STL

  1. •  Right click on the Merge file

  2. •  Click save
    (Note: if it complains about the model not being water tight then you need to re-look at holes)

  3. •  Save as type STL binary File .stl


  1. •  To reduce file size, Navigate to Polygon-→ Decimate

  2. •  Set "Reduce to Percentage" to 50%

  3. •  Click apply if no important features are lost

X. De-waxing

After your piece is printed out, it will need to be de-waxed by being heated in a small oven

  1. •  Set the oven’s mode to Bake

  2. •  Set the temperature to 150

  3. •  Hit Start

  4. •  Wait until all the wax melts off (~40minutes)