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And use a new blade that you only use for aluminum (apparently). Probably a case of the ol' cellulose-is-horrible-for-sharp-edges.
For that kind of resolution, you're going to want high-end ballscrews and Harmonic Drive servomotors, both of which are more or less backlash-free...
That and an H-bridge would be a better plan, yeah. But you're gonna run into whipping at higher feeds, for sure. Maybe add a removable support...
You should be able to step the motor at 2ms pulses, which, assuming that's an 8x8 screw, should give 2.5rev/s or 20mm/s. That's not quick, given...
Arguing engineers are hilarious yet incredibly educational. Long may it continue! :thumbsup: FWIW, I'd like to see an FEA breakdown of the...
If it's really large and requires a decent amount of torque to move around... Have you considered chain drive? Similar TPI/rev figures, but, well,...
@Mark Carew Ah, ok. I saw a 3D-from-JPG option with a toolpathing program the other day, as it happens. I guess it's a thing. Not sure how useful...
It's perfect, really- priced ideally for those with just a touch more technical ability and don't need absolutely everything plug-and-play. Looks...
The C-Beam is a little rich for my blood, but the design is very similar to my current design intent. I think I've FINALLY settled on a design. ;)...
Ohhh, gotcha. I guess if that's a backlash issue, you need to add rotary encoder feedback or change the design of the rotary drive (chain instead...
I like these compact five-axis machines. They seem much more feasible than the large enclosed turret-type 5-axis industrial machines. I'd assume...
Relevant to this topic: I've been reading through this RepRap thread on G61 vs G64 motion modes- http://forums.reprap.org/read.php?147,106954 -...
Yeah, the non-friction non-backlash cycloid theory is as far as I'd gotten other than some basic pricing and the installation stuff, so thanks for...
Yeah. If I'm gonna pay $500 a unit, I'm going with ballscrews and dealing with any whiplash as necessary. Obviously, I assume most of us on this...
My concerns with constant pressure/preloading systems are instantaneous/shock loading and excessive wear. I suppose it depends on the setup and...
A scope is something I've really wanted for a decade, and actually needed on a few occasions over the last year or so. Steppers are definitely...
I was looking into this the other day. Any opinions on DIY-ability? It seems like a perfect drive system that isn't overly complex and doesn't...
Slight update. Time for more stream of consciousness rambling, as my brain wends its way toward a vaguely solid idea of what this project is...
I doubt the OpenBuilds NEMA 17 would have any issues pulling a GoPro vertically. The trick to pulling vertically is counterweighting, not raw...
Are there published values for this thing's flexural and torsional rigidity? Considering it's basically aluminium C-beam, it could have some...
