After building my Mendel Prusa, I have been printing succesfully for while now.
There is however one thing annoying me.
When a longer stretch needs to be printed (more than 30mm) the printer uses two speeds.
Initially it starts with the same speed it uses for all other printing but after the 30 mm it increases its speed.
This gives uneven surfaces.
Does anybody know how to correct this.
I use Sprinter on Ramps 1.4 and Pronterface with Slic3r.
Many thanks.