QuoteSven.L Thanks, Paul Delta. Is this the case with everyone: that the jumpers were already mounted on the RAMP board when receiving the printer set? Can that be confirmed? Or are there people who had to mount the jumpers on their own? In this case, where were the jumpers when you received your printer set? The jumpers were already installed on my RAMPS board when I received it. Mikeby ncc1701mda - Delta Machines