Which model orient is better for printer?

Discussion in 'Technologies and Hardware' started by Freakazoitt, Jan 8, 2014.

  1. Freakazoitt
    Freakazoitt Well-Known Member
    Which model orientation is better for printing in WSF and FD:
    horizontal:

    HHHHHHHHHHHHHHH

    or vertical:

    H
    H
    H
    H
    H
    H
    H
    H
     
    Last edited: Jan 8, 2014
  2. stannum
    stannum Well-Known Member
    You can't select orientation so...
     
  3. Freakazoitt
    Freakazoitt Well-Known Member
    I can change it in 3d program before uploading.
     
  4. Freakazoitt
    Freakazoitt Well-Known Member
    Or it does'nt sence and SW specialists can rotate model as they want for better printing?
     
  5. stannum
    stannum Well-Known Member
    They can and will rotate.
     
  6. AmLachDesigns
    AmLachDesigns Well-Known Member
    Also worth noting is that it is not just horizontal and vertical: your model will be rotated to minimise the 'Oriented Bounding' box if at all possible..

    In my experience this can cause stepping. A model that I thought would be printed either horizontally or vertically was in fact printed at a slight angle to horizontal because of this rotation.
     
  7. mfoster3
    mfoster3 New Member
    The printing techs reorient models in order to get the best "yield" per print job. They gang many different orders for the same material into a single print job and they reorient the various models to optimize the use of the material in the print volume. So even if you submit a model of say a gear that has the gear profile in the XY plane (generally considered to be the print plane) it may be reoriented into the XZ or YZ plane in order to achieve better job utilization. The Z axis or layer step axis is in my experience less accurate because it is not as fine as the XY laser scan layer. As a result features that you want to be round such as holes can come out oval.
     
  8. Fireball_Modelworks
    Fireball_Modelworks New Member
    Shapeways keeps hinting that user-selectable print orientation is coming, but it's still not here yet. I'd gladly pay extra for that option, but I don't know how much they would have to charge to make it feasible.
     
  9. mfoster3
    mfoster3 New Member
    I have requested and would gladly pay a reasonable surcharge for an orientation selection option.

    I suspect that either Shapeways and/or the printer vendors are working on software to automate optimization of print volume utilization. As the volume of printed parts climbs this should get easier as the optimization can span several print volumes. It would be both an interesting and challenging problem to work on.