I'm having problems with my Woodpecker Super Fence in an offset application (cabinet door finger pull edge bit with no bearing).
I set up the fences for the offset, tighten everything down well and begin to run my cabinet door against the infeed fence toward the bit. The problem is that the infeed fence moves inward just as the stock begins it's pass over the bearingless bit (you can imagine the result). I tried tightening the 2 black plastic knobs with pliers and got the same result....a slipping fence. I noticed the black knobs used white nylon washers, so I tried removing them thinking they were the cause of the slippage. Now when I tighten the black knobs without the slippery nylon washers, the infeed fence pulls itself out of parallel just as the knob begins to get real tight.
It's probably difficult to envision the problem from my meager description; I was hoping someone with the the same fence would know what I'm describing and perhaps could suggest a workaround.
I have a call into Woodpecker; their tech guy was off today and is supposed to call back tomorrow. I believe this is a design problem and will requires a workaround of some sort. I'm going to check out some other brand fences to see if I can find a better design.