I don't really expect to run this beast at 2400 RPM. I believe that 100mm/sec is about as fast as you can reasonably print plastic. Yes, that's open to nearly infinite debate, and yes I have run a lot faster than that on occasion.
If the machine gets into the 60 to 100 mm/sec range, fine by me. At least by my current calc’s each screw would hit 130 mm/sec at 10.23 revs/second. That’s also the point where the motors go from needing a 36V supply to needing a 48V supply with 3A of drive (they are rated for 4.2A). 90 mm / sec gives me 7 revs / second and I can hit 4.2A out of a 36V supply.
Yes, I'm mixing hot end speed with the speed of the nuts on the screws. That's not something that maps 1:1. I'm sure one screw goes a bit crazy as you bring the effector close to it. About all I can really say without some more math is that it's in the right ball park. That's good enough to continue with the design.
If the machine gets into the 60 to 100 mm/sec range, fine by me. At least by my current calc’s each screw would hit 130 mm/sec at 10.23 revs/second. That’s also the point where the motors go from needing a 36V supply to needing a 48V supply with 3A of drive (they are rated for 4.2A). 90 mm / sec gives me 7 revs / second and I can hit 4.2A out of a 36V supply.
Yes, I'm mixing hot end speed with the speed of the nuts on the screws. That's not something that maps 1:1. I'm sure one screw goes a bit crazy as you bring the effector close to it. About all I can really say without some more math is that it's in the right ball park. That's good enough to continue with the design.