Geeetech Prusa I3 pro W User Manual page 22

The print speed defines at which speed (in mm/s) the print head moves while printing. Based
on this setting, EasyPrint 3D will also calculate how fast the filament must be extruded. A higher
print speed will lead to a shorter print time. But keep in mind that increasing the print speed means
that you might have to increase the temperature as well, to ensure the plastic is properly melted.
Although you can choose one overall print speed for the complete print, it's also possible to
use different print speeds for specific parts of the print:
a. Max/Min print speed: This parameter defines the max/min speed [60-100mm/s] at which
the printer runs.
b. Travel feed rate: This is the speed at which the print head moves when it's not extruding,
that is, when the print head is moving from one point to another. A higher travel speed decreases the
chance of filament leaking from the nozzle, producing a cleaner object. On the other hand, a very
high speed means that the nozzle can hit an already printed part so fast that it might be damaged or
deformed by the hot nozzle. This can be prevented by using lift z when retracting though.
c. First layer speed: With this setting you can specifically change the speed for the first layer
of the print. By default a low speed is used for the bottom layer, so that the material sticks well to
the build plate on the first layer. As mentioned in the above section, the first layer is important to lay
down correctly, and a slower pace helps enormously. Setting a value of 50%, or even less can really
help.
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