ShopBot PRS Assembly Manual Page -22
matches the tool’s work area, center the support board(s) in the Y direction between the
front and back table sides. For example, for a 4x8 tool, a 4x8 sheet should be exactly
centered. If your sheet material is oversize, then for all tool sizes locate the front side of the
sheet 6.75” in from the front side of the tool.
Clamp the sheet(s) in position, then attach through the holes in the cross supports with the
3/8” by 1.5” carriage bolts that are included in your parts. Use, every-other diagonal hole in
an alternating pattern in the Center Cross supports; every hole in the end supports.
From under the table, at each hole in the Upper End Cross Supports and alternating holes in
the center Cross Supports, drill a ⅜” hole through the Support Board
Countersink the holes on the top of the Support Board with a spade bit.
Insert the ⅜” x 1½” carriage bolts down through the Support Board, Upper End Cross
Supports or center Cross Support and attach with flat washers, lock washers and nuts.
If you are putting a vacuum hold-down system on your ShopBot. Please see the
documentation for the vacuum hold-down system for more information on installing your
plenum and bleeder board.
If you are not installing vacuum. Then attach a second layer to the support layer board
using countersunk drywall or plastic screws. When your tool is operational, you will be able
to surface this layer, and then attach a final sacrificial or working layer to your table.
The choice of actual material and methods for attaching your table depends on the nature of
work you will be doing, the kind of hold-down system that you use, and the experiences
that you gain with various materials. Your table surface is likely to evolve over time.
PRSAssembly080922.doc Copyright 2007,2008 ShopBot Tools, Inc
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