rewolff

Hi, How can I estimate the amount of plastic a model will use? I'm trying to print the standard test-cube 20mm. During the whole process, the gear moves (almost) 5 teeth. As the big wheel has 50 teeth, my feedroller will move 1/10th of a rotation. A full rotation would advance the plastic by 8 * PI = 24 mm, so a tenth of that is 2.4mm. So, the models is being printed with 2.4 mm worth of plastic. If I remember the formulas correctly the area of the 3mm plastic is a little over 6 mm^2. Times 2.4 means about 15 mm^3 worth of plastic. Is that correct for the 20mm cube? I don't think so. Total area of the cube is 6 * 20 * 20 = 2400 mm^2. This would make the walls of the cube about 6 micron thick. That's beyond the capabilities of the ultimaker I believe... :-) So.... Why is there a scaling problem in the feedrate of the plastic feeder?

In the assembly instructions there are things like: "manual extrusion should work without too much force". As this is my first ultimaker, I don't know what "too much force" is. But I think that works. How fast should the machine be able to turn the extrusion wheel? It moves really really slowly and I can't get it to extrude anything realiistic. Also after extruding, there is a lot of drooping. I've managed to print the test-cube, with manual pressure on the PLA material. Of course the quality is very bad as I didn't know when the machine didn't want any extrusion... So, there seems something wrong with my material feed assembly. What could be wrong? How am I supposed to test it? Can I manually test it with the control panel? (Should I be able to see the PLA material move? It now moves so slowly that you can hardly see the wheel move, you can put your finger on it and it seems to do something....) Is it normal that it takes 5 seconds after I press "stop" in the control panel to come to a halt? P.S. Oh... http://wiki.ultimaker.com/Ultimaker_rev ... _the_clamp the second picture shows TWO delrin parts. I THINK the current version comes as one piece, correct?