1 Topic by XistenZ

  • XistenZ
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Topic: How to print "roof" on objects?

Im trying to print an object with "holes" in the bottom so they are not filled. The printer doesn't fill them exactly, but it tries to print the "roof" in the air, so there's nothing to hold the roof. It should build from the edges so the roof has something to lay on. Like in this video where they print a whistle, it doesn't print in thin air but start at the edges.

Here's a pic of the principle I want to achieve. Left is how it is now, and right is how I want it to print.
http://s28.postimg.org/w32machm1/roof_Print.jpg

2 Reply by DePartedPrinter

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Re: How to print "roof" on objects?

what are you using to slice your model? can you post an stl?

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3 Reply by XistenZ

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Re: How to print "roof" on objects?

Slic3r, from Repetier Host.
Link to .STL: http://www.thingiverse.com/thing:34267

It's a little knob, I need to print it upside-down, but the details (petals?) in the knob looks terrible since the printer tries to fill in the holes instead of printing over them. If you look at the thing you'll know what I mean.
I solved it by printing the knob and the "distance between knob and drawer" separately and glued them together instead, but would still be nice to know if there's a way to tell the printer to not print in the air but to anchor the sides first.

4 Reply by cervantja

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Re: How to print "roof" on objects?

can you make the top of the hole cone shaped? Rational: the printer can print up to a 45° overhang. So in other designs I have used cone shaped holes.

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5 Reply by XistenZ

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Re: How to print "roof" on objects?

Redesigning would be a workaround, I'd prefer to be able to tell the printer to be clever.

6 Reply by gr3g

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Re: How to print "roof" on objects?

Who knows what algorithms these softwares use to make their gcodes.. When I come across a gcode bug that's undesirable to me, I'll rotate the part at some random angle (say 60-degrees) and maybe translate it somewhere else slightly.. Then re-generate the new toolpath.. This has worked to get around some algorithm-induced Gcode bugs.

7 Reply by IronMan

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Re: How to print "roof" on objects?

Have you tried slicing with support turned off and no raft?  Those bridges should be no problem...

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