Prusa I3 Bad printing

[Alibert]

What do you mean with slow? The z-axis movement or the extrusion rate?

As to the first, that value of 1.2 may be adjusted a little upwards (it is the max speed of the z-axis in mm/s). Don't overdo it as the z-axis is the most problematic one in the i3 design and you will get artefacts or skipped steps if that setting is too high. The micro needs to generate 4000 pulses for the z-axis stepper to move the hotend 1 mm in z direction according to your defines. This means the stepper motor will need to do 5 whole revolutions (assuming a 200 step/revolution stepper). For the x- and y-directions, only 80 steps are needed per mm of movement.

According to those settings again, 226 steps are needed to push 1 mm of the filament through the nozzle, so if your true e-steps is 112, then change that 226 to 112.

PS: you might have already understood that those arrays in the defines specify the values for x, y, z and extruder motors in that order.