Problems with SME V Tracking


I just purchased an AVID Volvere/SME V setup, and I'm having problems tracking normal weight LP's. The arm tracks 180-200 gram LP's flawlessly, but on nomal weight vinyl it "sticks" at about 3" to "5" into the LP. Very frustrating to say the least. I have a Benz Ruby 3 that I've set tracking force to 2 grams, slightly over the recommended 1.8 grams. I've also adjusted VTA which initially helped somewhat, but I just can't "dial it in."
Thanks in advance for your comments/suggestions.
dirk
The SME has an unusualy thick armtube. With shallow cartridges it can sometimes catch on the armlift or on the edge of the platter. On thicker lps the armtube runs a little higher thus clearing the lift. Check this before doing something radical.If that is the problem up the VTA or get a spacer between cartridge and headshell.