On Fri, 11 Oct 2019 17:49:04 -0400, Jim Wilkins wrote:
"Scott Lurndal" wrote ...
"Jim Wilkins" writes:
"Scott Lurndal" wrote...
"Jim Wilkins" writes:
"Scott Lurndal" wrote...
Mounting the router in a router table would make fixturing easier.

I wouldn't want to try to move a 9" thick stack of 20"x8"[*]
plywood pieces on edge across a router table. Much easier to move
the router in this case and keep the material stationary.

[*] Assuming a 20" wide by 8" deep drawer.

I wouldn't want to either, that's a task a bandsaw (or my sawmill)

How on earth do you cut box joints with a bandsaw?

How do you rout a 9" thick stack?

[re 2 stacks of 8 ea. 3/4" pieces)]:
Set the stack on end. Clamp the stack to prevent the boards from
shifting.
Clamp it vertically in the face vise (or clamp it to a vertical surface
such that the end you're routing is horizontal).

Place your homemade box-joint jig[*] over the end, clamp and rout away.
Offset the jig by the width of one crenellation for the other stack to
cut the matching joint.
....
Voila, one now has the sides for four drawers. Glue, assemble and
clamp.

You must have a very nice router if you can cut the edges of a 6"
thick stack without chatter or deflection.

Stack thickness makes no difference -- router bit stickout is just
over 3/4", regardless of thickness.

--
jiw