You don't really need a metal drum. A wood drum might be preferable. The websites I've looked at talk about truing the drum by putting sandpaper on the table and raising it into the drum. That makes it perfectly aligned to the table. If you use a metal drum, you'd have to make some type of adjustment to align it, and that would be a lot harder, imo.
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Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |