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"Finally, they devised a high-speed gantry mechanism — an H-shaped frame powered by two motors, connected to a motion stage that holds the printhead." It seems
by jaclaz 9y ago
"Finally, they devised a high-speed gantry mechanism — an H-shaped frame powered by two motors, connected to a motion stage that holds the printhead."
It seems a CoreXY or H-bot design, I always believed that the issue with this design (like any cartesian design) is with the limits of acceleration and "drag" of (relatively) massive parts, particularly because the X and Y axis have not the same weight/mass when changing orientation of the movement (the Z is less of a problem, at least with "large" surface prints, the issue here is only around precision), and that was the reason why Delta's are usually faster.
Maybe a Delta with that head/printing gear can move even faster ...
- coredog64 9y agoMy wife has several Delta and XY printers. The deltas are much faster, but they're also much more "fiddly".
- virtualritz 9y agoCould you define "fiddly" in this context, please?
- hexane360 9y agoHarder to calibrate, mostly. In a CoreXY printer you can calibrate the X and Y axes more or less independently. In a delta you have to take several points to get exact values for arm lengths and therefore a solution to the mechanism.
- Animats 9y agoHere's Naomi Wu's delta 3D printer mod. She mounted one on a backpack carrier frame, powered it with batteries, and walked around Shentzen while 3D printing.[1] This one isn't "fiddly" at all. [1] https://www.youtube.com/watch?v=i-ksb-gzfyE https://www.youtube.com/watch?v=i-ksb-gzfyE
- sigstoat 9y ago> It seems a CoreXY or H-bot design, I always believed that the issue with this design (like any cartesian design) is with the limits of acceleration and "drag" of (relatively) massive parts there are enormous multi-ton machines which can move faster than tiny little delta printers. delta printers are good at maximizing speed when you have constraints like price, noise, weight, "fits in my home", "uses single phase residential power" and "cannot literally tear my limbs off". don't confuse the constraints of consumer printers with the constraints of industrial machinery, which is what it looks like these folks are trying to design.
- jaclaz 9y agoI don't know. I believe (maybe wrongly) that any FDM printer with "filament" is anyway dedicated to "consumer level" (or at the very most to the "prosumer") market. Industrial machines tend to use very different technologies using laser sintering or similar.