Read our introduction, Cura tutorial, and the common problems section below. If after that you still get stuck, contact Simon. We offer you to print with us, but we do not have the time to print for you.
How do I print my pet protein?
You will need the PDB coordinates, Chimera, and this tutorial. Afterwards you'll have an STL file which you can then cut with Cura for printing.
My print is taking too long?
Use the fast settings or scale down your model. Even with fast print, you will get a decent looking print on the Ultimaker2.
What material should I print with?
We recommend PLA because it is the most reliable. Only if you need heat resistance, change to ABS. If you need exceptional tensile strength, use nylon. Both ABS and especially nylon and flexible filaments are much harder to print than PLA.
Extruding a few centimeters of filament, especially after changing the roll, can help overcome a block.
If that doesn't work, you have to disconnect the transparent filament guide tube and pull out whatever obstruct the flow. In 3D jargon this is called the atomic method.
If that fails, the printer head needs to be disassembled, the nozzle soaked in acetone overnight, and then scraped out with a hex wrench. Once there's little debris left, push through the nozzle with a 0.3mm needle.
Filament does not advance / no plastic is extruded
This can have a few causes the most common of which is that the motor that transports the filament has ground away enough filament to loose grip. You need to reverse the filament via Material / Change, cut of the bad part, and insert it again.
The other common error is that the filament is in a knot. It happens easily if you don't fix the loose end after changing a roll. It can then slip underneath other strands and prevent the machine from unrolling it causing your print to fail. After taking off a roll always lock the loose end (see below).