[xlr82v2]

It looks as if your travel speed is not consistent... too fast at some points, and too slow in others.

Watch the puddle, not the arc... the puddle will dictate your travel speed. Keep your puddle "round", about the diameter of the width of your bead... if you see your puddle getting oblong along your path of travel, you're travelling too fast. If it's getting oblong across your path of travel (getting wide), you're going too slow.