I have a biscuit joiner that gets used maybe once a year. It's good for
alignment if +- 1/64 is close enough. For edging, such as you are doing, I
wouldn't use it. There are more accurate ways. I really don't find the
biscuit joiner to be much use.

"krw" wrote in message
...

A while back I bought a PC biscuit jointer and have just gotten an
excuse to use it. I broke it out today, planning to add an Ash edge
some plywood for a cabinet I'm making and have run into some
questions:

1. The biscuits seem pretty loose in the slot. I can move the boards
laterally a 64th or so. Is this normal? I thought they'd be more
like dowels and be quite tight. I know the idea is that they expand
when glued but the slop isn't giving me much confidence. My plywood
is somewhat warped so there is no way the biscuits are going to hold
the two pieces laterally. It seems I'm going to have to make some
cauls this weekend.

2. Is the PC jointer supposed to sound like a coffee grinder? I would
have expected the sound from HF, but not a "high end" jointer like the
PC. I can't feel any slop in the bearings so I don't think this
accounts for any slop, but thought I'd ask.

Thanks.