#1
Anyone else having trouble with this? I can sweep pick to a standard level, but as soon as i turn the metronome on i fall to pieces. I find metronoming them slower is harder too.
#2
How long have you been practicing sweeps? Also, how many notes are in each sweep? Try grouping them differently. Make sure you are saying the rhythms: TRI-PU-LET, TRI-PU-LET, or 1-e-and-uh 2-e-and-uh.

EDIT: Make sure you practice at slower tempos, it helps you gain control, and in turn, you become more fluid with motion.