We are used to dealing with warping when printing with thermoplastics like ABS, but metal printers suffer from this problem, too. The University of Michigan has a new technology, SmartScan, that promises to reduce this problem. You can see a video about the technique, below.
The idea is to develop a thermal model of the printed part before laser sintering and then move the laser in such a way that heat doesn’t accumulate. The video shows how engraving metal in the traditional way causes the metal to warp as the laser heats up areas. Using the SmartScan thermal model, they were able to reduce deformation by almost half.
It sounds like they have not yet applied this to sintering in a 3D printer, so you can only assume that the results would be similar. Of course, heat distribution through a powder may well be different than through solid metal, so further testing is certainly warranted.
We couldn’t help but wonder, too, if the results would be almost as good if you simply selected random segments of the pattern to run instead of running totally in sequence. Sure, the model-based approach ought to be better, but we wonder if it would be much better compared to a simple dice roll method.
Meanwhile, we are still waiting for our metal 3D printer. Copper seems to be in reach. If fact, it is, if you don’t mind some postprocessing.
9 thoughts on “Reducing Warping In Metal 3D Prints”
They just need to slow down your print speed and apply hair spray and elmers glue stick with painters tape on an acetone wiped and properly trammed bed, right?
So many wasted prints to get my machine in tolerance and after achieving this I still ruin 1 in 10 of my prints.
What are you talking about? This is SLM… that’s with a powder bed. You clearly didn’t bother to read the article or watch the video. Shame on you.
Pretty sure Jc is joking
Think just doing one line from each opposite side of the model at a time would be very similar for most models.
That would a cool comparison – thermal models vs a naive pattern
Some sort of ring/circular pattern maybe? Try to keep the section being printed in uniform stress.
It’ll be interesting to see how long it takes for them to get it to work, more then tripling your complexity going from 2d engraving to 3d building is going to be rough.
It’s still 2D, maybe needs time between the layers to even out the hot spots.
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