I was thinking since a while to do a platform like this for a

3D Printing
,
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I was thinking since a while to do a platform like this for a new kind of reprap. Looking at this, I realized that my thought were not so wrong…

Originally shared by Michael Weber
http://www.youtube.com/attribution_link?a=wmN1OPXe4jcGsFWBdiss8Q&u=/watch?v%3DNgIVZzDyhsA%26feature%3Dshare

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While this idea is clever, for 3d printing, I think the cons fat outweigh any Pro. The amount of inertia that is being created during any motion is preventing this printer from reaching any acceptable speeds. The purpose of moving the print had instead of the part is speed and less mass which prevents oscillations. Also, in this double polar design, there is no straight line motion, so any attempt at straight lines is a sinusoid interpolation. This also is adding a lot of twist to the filament after it is laid. Not sure what that does to each layer. Kudos to them if they prove me wrong, and I hope they do, but this design is to much for me to venture into. I’m working to eliminate the inertia in my printer to only have the print had move. My eventorbot has the y axis moving above the x axis in a very poorly constrained manner causing awful oscillations

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Your consideration were more or less the same that prevented me to put this in practice.
Mostly, the concept of hard to obtain straight lines, and the need to write a complete new firmware movement type. Even the acceleration on small still flexible parts lead me to think this may bend them when they are still soft, since the base never stops.
On a Mendel the base moves for the Y movement, but the movements are mitigated by X head movement, so it moves only 50% of the time. But even with this I had bended small parts.

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Klassno!