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05-14-2014, 11:54 AM #1
- Join Date
- May 2014
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- 14
Yes, I'm the same LoboCNC - thanks for the vote of confidence! One thing to be clear on is the distinction between a cantilevered bed that moves in Z (very difficult to do) and a cantilevered extruder that moves in Z. With a cantilevered extruder, all you need to do is accurately position a single point (the extruder nozzle) in space. Because the mass of the extruder is constant and the drag loads from laying down filament are small, you can position accurately without needing a hugely stiff structure. With a cantilevered build table you are not only need to worry about the position of the table but also the orientation of the table plane. Tiny deviations in your mechanism (rod straightness, etc) can cause the table to tilt which really magnifies these errors at the perimeter of the table. Also, just the weight of printed object can cause the table to deflect if the structure is not incredibly stiff. In general, though, it's hard to make any sweeping statements about the best place to put your X, Y and Z motion axes because so much depends on the actual implementation. For what it's worth, I've printed tiny 10 tooth 2mm pitch timing belt pulleys on the Mod-t prototypes, so it should be capable of pretty detailed prints.
And regarding the M3D printer - it'll be nice when New Matter finally releases some specs and pricing - it will make an interesting comparison.
Please explain to me how to...
05-13-2024, 03:08 PM in 3D Printer Parts, Filament & Materials