ShopBot PRS Assembly Manual Page -33
Set the Mechanical End Stops for the X Axis
The Mechanical End Stops are aluminum blocks that limit the movement of the car on the
axis by stopping the pinion motion for the X-axis (The Y stops are already positioned). The
blocks are locked into the slotted track just under the gear rack by two set screws. You will
position one the end of each rail. So you will put 4 on the X-Rails - one on each end of each
rail.
• Take a moment to be sure that both X- and Y- Cars are moving up and down the
rails smoothly. The motors will create some resistance, but the motion should be
smooth and even with all wheel bearings riding on the rails and pinions fully
engaged.
• Lay out the 4 mechanical stops, one at each end of the rack on the X-Rails. Check to
make sure that the stops slide firmly into place over the ½” rack.
• Use the ⅛” Allen wrench, supplied with the pinion gear pack, to tighten on the
blocks.
• Carefully roll the X-Car to one end of the X-Rails, watching the inside of the X-Rail.
Roll the car until the wheels are resting within ¼” of the end of the X-rails. Put a
clamp on the rail to hold the car in place at that position.
PRSAssembly080922.doc Copyright 2007,2008 ShopBot Tools, Inc
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