@Rob_Stuart_bornity “intersectional” designs like this with elements from different mechanism classes are nowhere near as obvious as they seem in hindsight.
Personally, I find it interesting how few 2-DOF planar parallel mechanisms are used in 3d printing in general. There’s the Morgan. Arguably the Ultimaker gantry. Maaaaybe Cartesio, HBot, CoreXY type builds if you want to count that type of thing as “parallel.” (Can’t help but notice all of those are parallel XY and Z-bed.)
@Ryan_Carlyle You’re right about the “intersectional” designs seeming obvious in hindsight.
Speaking of parallel XY w/ Z-Bed designs. Take my Deltesian design, wall mount the base, turn the hot end 90deg(nozzle pointing at the floor) and add a cantilevered bed…
@Rob_Stuart_bornity sure, or take a Morgan and tilt it on its side with a Y-bed 
@Ryan_Carlyle Sure but a Morgan’s build plate (in default orientation) needs negative -Z Travel or you have like a 2" build volume. You’d need an extension to where the nozzle typically is and I have to think by the time you stick it 200mm out into free space, you’ve going to get a lot of deflection in the arms.
@Rob_Stuart_bornity nah, just rotate the nozzle to point down and add another little parallelogram linkage on one of the arms to keep it perpendicular to the build plate.
@Ryan_Carlyle I still don’t see how the reoriented Y-Axis can even be used.
@Rob_Stuart_bornity why’d you put the hot end at the top of the arm linkages instead of the bottom?
@Rob_Stuart_bornity https://i.pinimg.com/736x/41/22/56/41225658582a239bee86bcd1f1fbf0c9--a-robot-d-print.jpg
Got it. I was thinking of reorienting an existing machine rather than rebuilding it on a new frame.
The linkage for keeping the head level makes sense too.
Frame wouldn’t have to be too beefy to support the arms.
Has anything mainstream incorportated a bed driven by a rotational arm?
@Rob_Stuart_bornity there’s rotary arm beds and there’s turntable beds. Turntable beds (“polar printers”) are way more common for rotary bed stages. Rotary arm beds are rare but have been done a few times. There’s the Polarworks Alta, which is both at once…
