Hi Jason, Sorry answering you so late. Life forced me to put all the work on the pump on a halt. So the project is frozen from many months so I cannot answer your questions. Hopefully after the New Year I can restart the work. Did you built the pump? Do you have some findings? regards, Ioanby Ioan - Paste Extrusion Working Group
Hi Anthong, You can find the details to build a paste extruder as seen in the video linked by nophead here: reprap paste extruder You will find there a 3dpdf file so you can see what parts are needed. I didn't uploaded it on the reprap wiki page because I want to modify it a little bit and may be to lower the metalic parts count. If you have a NEMA17 then the paste extruder will not cost you moby Ioan - General
Thanks for the tip! I will try out asap. regards, ioanby Ioan - Paste Extrusion Working Group
Hello people! Here is my third video of the paste extruder: high speed printing Printing polymer blend at 16mm/sec., 0.5 mm nozzle, 250 micron layer. regards Ioanby Ioan - Paste Extrusion Working Group
Hello guys! I have uploaded the peristaltic paste extruder on Thingiverse: paste extruder Enjoy! regards, Ioanby Ioan - Paste Extrusion Working Group
Hi guys! Here is a second video printing viscous glazing cream: printing glazing cream @nophead - yes the syringe is only a reservoir. from syringe there is an T connector at the inlet and the two pvc tubes goes along both sides of the screw shaft. The pumping elements (cream colour) are cheap latex tubes from perfusion sets (0.25 euro/pcs). At outlet there is an Y connector (not pictured) rightby Ioan - Paste Extrusion Working Group
Here are some photos of the printing head: paste extruder It still have some bugs which I need to fix. Hopefully next week I will post the stl files so anybody can try this design and improve further. Note that the print head is adapted for a rapman 3d printer but I am sure it is easy to attach on a mendel printer. Total parts cost don't exceed 10 euros except the stepper motor of course whicby Ioan - Paste Extrusion Working Group
Hi Traumflug! Sorry, I saw this morning that the video is not available yet on vimeo so you can watch it here: peristaltic paste extruder Yes the flow is constant and of course can be modified since the pump is stepper motor driven. However air bubles ar the big enemy. If the paste contains air bubles they will affect the deposited layer. The pitch of the screw shaft is 12 mm so the effect isby Ioan - Paste Extrusion Working Group
Hello guys! I am new on the forum but I am following your progress from some time. I would like to show you my progress with a new kind of peristaltic pump paste extruder. You can see it in action here: paste extruder The extruder is a screw driven peristaltic pump. The screw shaft pinches the elastic tube which is aranged paralell with the screw axis. Two chanels are in anti-phase to minimiseby Ioan - Paste Extrusion Working Group