Exemples with Cura

Vers 1.3 of Oct the 4th of 2017

1. Professor Monkey

    Find here a positionning image of a little Professor Monkey on the Ultimaker 2Go.

    Dimensions XYZ = WidthDepthHeight  (Largeur,Profondeur,Hauteur ) = ~32X58X29 mm. 

   And here some parameters to print it in PLA.

  Printing temperature  = 210°C

  Travel speed = 40 mm/s ( to allow a good positionning ).

   Overlap = 30% ( for Cura 2.4.0 set Skin Overlap = 30% ). To allow a good adhesion for tiny sub-parts

   of the main part , good shell and top and bottom faces, adhesion with the infill.

  

  Repair model : Options A and C.

  Brim ( jupe ) has no importance as you use a Raft.

  Lines supports with a good density ( for well-done part builing ) because they will be easier to remove.

  Raft  : with Cura 2.4.0 you must add some parameters.

              Raft Middle Spacing ( espacement des lignes de la couche intermédiaire ( interface )) = 0,6 mm.

              Raft Surface Spacing = 0,4 to get a homogenous surface layer to build the part above.

  NB: A Raft consists in tree types of layers : Base ( must adhere to the plateform ), Middle ( interface ) , Surface.

          Each type has 3 parameters : Height, Width ( épaisseur )of the ligne ( support in contact with the preceding layer ),

           Space ( espacement ) between lignes.

          Raft parameters can change with the material, the base of the part , the nature and texture of the upper face

          of the plateform.

  The Raft peels off from ( se décolle de ) the plateform. 

  Be patient and delicate to remove supports.

2. A Rose

   Made with the Mendel 90 Printer ( Prusa i3 ) in red ABS Dimensions : 45 X 46 X 43 mm

   Use of Cura 15.04.6

   Difficulty : thinness petals

   Here is the part view printed so :

                                 

   Parameters : layer height = 0,2 mm

                               Shell thickness = 0,8mm

                              Top and bottom thickness = 1,2mm

                               Infill Density = 50 %

                              Infill type = Grid

                              Printing and travel Speed = 40 mm/s

                              Extrusion t° = 235°C

                              Plateform t° = 99°C

                              Support on the plateform : Angle = 30°; Support Density ( Taux de remplissage ) = 25 %;

                                                                                     Horiz. Displacement ( Eloign. horiz ) = 0,5 mm.

                             Use of Raft

                             Here are the values for Raft and Repair Option :

                           

    B Stalk ( Tige )

       Dimensions : Base : 23,6 X 23,6 mm is adapted to the base of the rose.

                                   Height 53,2 mm.

       Printed with stalk above.

      The same paramerters as the rose.

      Here a view :

                          

3.Twisted Gage

   Difficulty : the branches are inclined according to XYZ of +/- 30°

                         No infill in the branches.

   Realized with Cura 15.04.6

    Dimentions : WDH = 75,6 X 75,6 X 69,3 mm

              

     Parameters : layer height = 0,2 mm

                                Shell thickness = 2,4mm

                                Top and bottom thickness = 2,4mm

                                 Infill Density = 50 %

                                Infill type : Grid

                                Printing and= 40 mm/s

                                Travel Speed = 75 mm/s     

                                Extrusion t° = 235°C

                                Plateform t° = 99°C

                 Here are the values for Supports :

          

              Brim : 5

              Raft : the same as for the Rose

             and Repair Option : A

4. Hollow a plain solid: ex: a cat

    Sinds Cura 2.3.1 you can specify top and bottom layers separately in lines.

    To print the cat bellow you specify infill = 0top layers = 0  and bottom layers = 8 lines ( six is enough ).

    It is better to use a Raft.

    Here is an image of the original almost full filled cat ( there are holes for the eyes ) :

    

    Here you find an image of the hollowed cat .  

  

 5. Bridges ( pont )  between lateral supports : the bridge has no supports. Above a certain length it tends to collapse

     ( s'effondrer ).

      You find in the image above on the left in red a try to make a bridge with these specifications : it is a full filled

     ( plein ) cylinder long of 10 mm and with a diameter of 3,8 mm.

      The difficulty is the round shape ( forme circulaire ); especially to print the bottom.

      A flat bottom coming from a rectangular section is easier to print.

      You see the result. The bottom is not well done. 

      It is printed with Cura 15.04.6 on an Ultimaker 2Go in PLA with the following parameters :

      Layer : 50 um.

      shell perimeter : 4 lines of 0, 4 mm = 1,6 mm.

      Top/Bottom : 1,6 mm : this setting allows better infill inside  the structure than with 1,2 mm. 

      Infill : 80 ; overlap : 15 %.

      Speeds: printing and travelling : 50 mm/s.

      Brim : 6 lines.

      Minimale fan ( ventilateur ) speed : 80 % of the max.

      In comparison a bridge with the same specifications but shorter ( 5mm ) is better done but is also a little

      cavernous ( creu ) at the bottom.     

 6. Pipe ( tuyau ) where there are faces externally and internally not supported. It is printed on a raft.

                                  The purpose is to get well-done internally and externally pipe. 

      In the image above, on the right is a pipe made with Cura 15.04.6 on the Mendel 90 ( ABS )

      Here are the specifications of this pipe : External diameter : 14 mm

                                                                                         Internal diameter : 10 mm

                                                                                         length : 30 mm

     Here are the printing parameters : layer : 0,1 mm

                                                                             shell thickness : 1,2 mm

                                                                             Top/bottom thickness : 1,2 mm 

                                                                             Infill : 100 %; overlap : 30 %. 

                                                                                 Always see the internal layers at the beginning of printing the internal

                                                                                 diameter after the slicing operation to avoid gaps before printing.

                                                                             Speeds: printing and travelling : 50 mm/s

                                                                             done with a Raft

     Result : better done than with overlap of 15 % above internally and at the beginning externally.

                     horizontally internal diameter : 9,2 mm.

                     vertically internal diameter : 9,4 mm. 

                     You see plastic deposition in the hole but no at the other end.

                     Overlap of 30% is a maximum because in some cases 22% is better.

                     For a short-middle length it is better to print it vertically.

 7. Pipe-bridge ( tuyau-pont ) between lateral supports. Difficult to get a good part.

            You see it in white on the left  of the cat. It is printed with Cura 15.04.6 on a Ultimaker 2 Go in PLA.

            Dimensions : external diameter : 7,4 mm

                                       internally diameter : 4,8 mm.

                                       length : 5 mm.

             Parameters :  same as the bridge.

            Result : Interior : well-done.

                            Exterior : lightly cavernous at the bottom otherwise is well cylindrical.          

 

 

   

 

 

 

 

 

 

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