Tabs and Flash
First step is to separate all of the parts from the sheets they were machined from and remove the tabs and flash, if any.
What are Tabs and Flash?
Tabs:
In
order to keep the parts in position while they are being machined small
tabs, typically .04 thick and about .25 long, are left in place to
prevent the cutting bit from throwing what would otherwise be loose
parts around the room.
Flash: The name is taken from plastic PC
models which typically have "Molding Flash". Caused if the molds the
parts were made from didn't fit together precisely, small amounts of
thin plastic would be present along the joints. The same thing happens
to the parts I cut if the cutter doesn't go all the way threw the
material. Can be caused by minor differences in material thickness or
the cutting surface not being held flat.
Tabs | 
Tabs and Flash |