Has anyone here experience with the Nscrypt products?
http://nscrypt.com/3d-printing
Interesting ideas in their FDM extruder. http://nscrypt.com/docs/nScrypt-nFD-Brochure.pdf
Thoughts and criticisms of the design?
Would love to see some different photo angles of that thing.
or a video for that matter … maybe printing…
Based on their website and brochure, I’m guessing it’s an extremely high gear ratio DC servo extruder for low-flow, high-precision printing.
Slightly different version here on page 4
http://utminers.utep.edu/pdeffenbaugh/2_4_GHz_IMAPS_Paul_Presentation.pdf
@Ryan_Carlyle it looks like so. It looks like really high gear from the picture. And if it’s DC then it must have a closed loop control logic which our firmwares don’t support even if it can be bought separately.
@Florian_Ford With that kind of gearing, I don’t think servos are even necessary. You’ll never skip steps before the filament strips or geartrain tears itself apart.
We CAN use servo controllers that accept step/dir pulses, or use MachineKit for native servo control. (You wouldn’t run that sort of bad-ass PNP system on Marlin…)
They don’t say what the control interface is, some servo systems do take step/dir/en signaling for almost drop-in use and the servo driver keeps track of the feedback loop by itself. But it looks on the heavy side to me.
@Florian_Ford looks like a two-start helix on the worm, and it looks like the filament is driven by or near the OD of the driven gear. That and they didn’t run any thrust and very little side loads through the motors gear box. I’m still curious to know what traction/grip contacts the filament.