3 ms·
Don't miss the "3D printing" section: they describe some of the challenges. Makes me want to work on the chocolate extrusion problem myself; "air pressure" see
by h2odragon 4y ago
Don't miss the "3D printing" section: they describe some of the challenges.
Makes me want to work on the chocolate extrusion problem myself; "air pressure" seems a poor choice when they already have a syringe and could have a mechanical plunger.
- samatman 4y agoThis would let you use a strain gauge to compensate for thixotropy kicking in. I wonder about ultrasound to prevent that, or a vibrating off center motor.
- h2odragon 4y agoconstantly rotate the plunger and maybe have some impeller flanges on it. this whole resevior assembly, with heaters and vibration etc can be kept separate from the nozzle with a "hot bowden tube"; that'll have to be short but we can reduce the precision moving mass ... maybe the tube can be longer if its warmed or have re-circulation or something.
- zwieback 4y agowe use "syringe pumps" a lot, basically a glass syringe with a stepper driving the plunger. If you replaced the stepper with a regular servo you could measure torque as a proxy for the chocolate properties
- aaroninsf 4y agoTIL the word "thixotropy" Surprised I have not to my memory encountered in discussion of earthquakes and liquifaction!