The literal translation of the term is a voltage reference. Stepper motors drivers have a device designed to maintain an accurate, low noise, constant output voltage. This is the exact description of what the driver does. The driver is the electronic device that takes care of guiding the stepper motor through the translation of the signals(an electric current) that are given to it by a processor.
Everybody who owns a 3D printer has experienced a clogged nozzle at least once, or most probably it will happen sooner or later. A clogged nozzle is a common problem and afflicts printers worth 200$ as well as printers worth 2000$.
Even if it’s the most known platform to find STL files for 3D printing it isn’t the only one and for some of you, there are far way better alternatives than Thingiverse. You will find that some will accommodate your needs better.
When somebody tries for the first time a transparent filament usually they remain dissatisfied. It is very difficult to achieve crystal clear prints and the result is more a translucent white than anything.