Design for 3D Printing

patrick_shea

I am trying to design a support for a 4" Plastic dust hose.  Apparently my design will require a lot of support, that will need to be removed after printing.  Looking for a bit of input an how I can make this easier to print.  It is a 1 off piece, so if it takes time to clean up it is not a big deal.  The design allows a couple of tie wraps to hold the hose on place.

Here is the part:

PLANER DUST HOSE SUPPORT | Part Studio 1 (onshape.com)

Patrick


 

_anton

You could make a big 45-degree chamfer on the underside that goes right to the cradle's edge (0.77/2 inch, if my math is right).

alnis

Edit: didn't see Anton's response; that's also a good option!

I don't think the support is anything crazy in this case. It goes from 1:49 21g/$0.51  to 2:15 23g/$0.58 in Cura with typical settings for me. Probably not worth the time to optimize 7 cents off the print (assuming PLA), but you could try adding an angle with a sweep/replace face that matches the most extreme angle your printer can print. Alternatively, you could use a draft as an approximation. Here's the sweep/replace face example: https://cad.onshape.com/documents/1abe93154f1d0baa341b15c3

Here's what your model looks like sliced with Cura:
.

michael3424

If you really want to avoid supports, try splitting the part into the base part and the saddle part - print the base as shown, the saddle on edge and then glue the two together.  Printing with supports should be doable (and easier), though.

nick_papageorge073

Slightly off topic, but you did a good job with the design.... if it was to be injection molded:)

Edit, it could be redesigned slightly to make it all open-shut.

nick_papageorge073

_anton said:

You could make a big 45-degree chamfer on the underside that goes right to the cradle's edge (0.77/2 inch, if my math is right).

I believe his design has the wire-tie in that space, and the chamfer would cause it to slip off.

nick_papageorge073

How about this design? Disclaimer, I'm not that good with 3D printing, and my printer seems to always have some issue. I come from an injection molding background for mass production. But this design might have enough draft on the sides and rounded surfaces at the top, that perhaps a printer would not need support at all? The wire tie goes through the slot and you would have to fish it out the other side.

https://cad.onshape.com/documents/ca4ee63b8f2cf41a543b4127/w/ed323348953ac634d5f25f6d/e/ce14df7a3479926e71f6157d?renderMode=0&uiState=61b02e797599dc4ebb795cfd

POC

FYI - If you print this on an SLS printer (sintered power) you will not have the support issue..

patrick_shea

Thanks for all the feedback - I re-thought my design, and I will lay it on its side for printing.  I need to have a strap (or Tie wrap) to secure the 4" hose - so check out plan'B'
PLANER DUST HOSE SUPPORT - Copy | Part Studio 1 (onshape.com)
Also - I have Cura and a Prusa printer I and getting used to, but I was wondering if anyone is using KIRImoto? And where does that file go when I export it?

Pat

dirk_van_der_vaart

Looks very good!!
It's a bit difficult to put the Tie-wrap in the holes, so maybe 1 step further
https://cad.onshape.com/documents/582a266db2197f91d5ed5378/w/2d044cfd5f225a8c7289dfa4/e/5b8bb3bbceb99c5fe29161cf