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Step 2:
Step two has us assembling the front X/Z gantry plate. While looking at the completed machine, this will
be the front plate that holds the Z gantry and moves side to side in the X direction. Recall front to back is
Y and up and down is Z.
Note a change from the video, the Z is now driven by a single adjustable tension acme nut. Set the
tension on the ACME as we did in step one. Insert the acme rod and turn in on the set screw until there
is a slight resistance to turning the rod by hand. Do not lock the ACME in place by adjusting too far.
STEP 2
Front XZ Gantry Plate (Machined)
Large Xtreme Wheels
Mini Delrin Wheels
Adjustable Tension Anti-Backlash Nut
1/4" Spacers
1/4" Mini Eccentric spacers
3mm Spacers
M5x20
M5x25
Note that all wheels are installed with ¼" eccentric spacers in this step to allow adequate room for the Z
gantry.
To begin assembly, note that one side of the plate has recesses. We will be installing bolts from this side
and the eccentric and regular spacers on the other side. Also, you will note one side of the inner gantry
wheel holes is smaller in diameter, we call these the reference holes. Install these and tighten down the
wheels, then use the eccentrics to add tension to the opposite wheels. All wheels on the reference holes
should touch the beam, this ensures a true Z. Install and correctly tension the inner mini-wheels on the
inside of the C-Beam (250 length), before installing the outer larger wheels. Install the eccentrics so that
the wheels are as close as possible to the reference wheels. Install the beam and turn the eccentric until
the wheel touches. Start in the center and work toward the top and bottom wheels.
Qty.
Smw3D
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Last updated: 08/13/20108
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Rev. 9
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