Show all posts by user
General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: Large Scale Nozzle - 8 years ago
Thanks so much for all your help, its very much appreciated. I’ve made a couple of revisions based on the suggestions above. Hopefully I’ve got it all a bit straighter. The melt chamber is expanded out to 5mm to accommodate the square profile at the bottom of the heat-break: (looking at the drawings from the patent, hopefully this reduces flow upwards and creates a meniscus around the filament).by mdashd - General
Re: Large Scale Nozzle - 8 years ago
This is wonderful, thank you. It confirms some of the suspicions I had and I'll give it a going over. Do you have any ideas of what might happen if I shifted your changes a little and put the narrowest part higher within the nozzle? (Something like the drawing attached: ) Would it change the diameter of the resulting extrusion? As it reduces the volume of the melt chamber, would it also reduceby mdashd - General
Re: Large Scale Nozzle - 8 years ago
Thanks for the quick response. The precedents posted are really neat and precise looking, but I think there might be a significant difference in the desired outcome (though I'm not absolutely certain that extruder size necessarily translates directly to product size.) This extruder has to be capable of producing products of a much larger size than a 3d printer - moving towards architectural scalby mdashd - General
Large Scale Nozzle - 8 years ago
I'm trying to build a small extruder that can start to work at a tiny-architectural scale. The priority is extrusion speed over accuracy or finesse. I’m using a NEMA 17 stepper motor to drive 3mm filament (ABS) into a custom, large scale heater-block; heated by 3x 24v 40w cartridges (Drawings of nozzle are attached.) At the moment, the motor is pushing hard into the hot end which is producinby mdashd - General