"TDUP" wrote in message
...
You have to guide the blank into the blade by using a runner in the miter
slot of the saw. Fine woodworking has a plan for a circle cutter that uses
the miter slot and works really well. Maybe someone has a link???

Tim

Rockler sells a kit for a circle cutting fixture. You supply the MDF or
plywood and a runner. It is adjustable for any diameter up to about 24"
IIRC. It is about $20 The fixture was featured in their magazine,
Woodworker's Journal.
Ed