Fine Tuning the NWA3D A31
1. Adjust the tension of the build plate assembly on the Y-axis on the base
frame.
a. Check the tension of the build plate assembly. Hold the build plate
carriage (the metal plate under the build plate) and try to wiggle it left
and right. If the build plate assembly wiggles back and forth on the Y-axis
frame, it is too loose.
b. To tighten the build plate assembly, rotate the three eccentric nuts that
connect the three wheels to the right side of the build plate assembly. Use
the open-end wrench to rotate the nuts slightly—a quarter turn is usually
enough—until each of the three wheels is tight against the Y-axis frame
and the carriage no longer rotates.
c. Re-check the tension of the build plate assembly. The assembly and the
belt should move forward and backward without much effort, but there
should be no side-to-side wiggle or play.
2. Adjust the tension of the gantry on the right pillar of the gantry frame.
a. Check the tension of the gantry assembly at the right pillar of the frame.
Hold the gantry and try to wiggle it up and down. If the gantry wobbles on
the right pillar frame, it is too loose.
b. To tighten the gantry, rotate the one eccentric nut that connects the
wheel to the inside of the gantry. Use the open-end wrench to rotate the
nut slightly—a quarter turn is usually enough—until the wheel is snug
against the frame pillar and the gantry no longer wobbles.
c. Re-check the tension of the gantry by rotating the leadscrew. The gantry
should move up and down smoothly, and there should be no wobble,
play, or “chatter” on the right side of the gantry.
3. Adjust the tension of the nozzle assembly on the X-axis on the gantry frame.
a. Check the tension of the nozzle assembly. Hold the mounting bracket
behind the nozzle and try to wiggle it back and forth. If the nozzle
assembly wobbles on the X-axis frame, it is too loose.
b. To tighten the nozzle assembly, rotate the one eccentric nut that connects
the wheel to the bottom of the nozzle assembly. Use the open-end wrench
to rotate the nut slightly—a quarter turn is usually enough—until the
wheel is tight against the X-axis frame and the assembly no longer
wobbles.
c. Re-check the tension of the nozzle assembly. The assembly and the belt
should move left and right without much effort, but there should have no
side-to-side wiggle or play.
4. Check the tension of the belt driving the Y-axis (under the build plate). The
belt should be taut, with no slack or slop. If the belt is loose:
a. Loosen the four bolts at the front of the base frame holding the belt
follower pulley to the base frame.
b. Using an Allen wrench as a lever, push the follower pulley away from the
frame to tighten the belt.
c. Holding the belt taut, tighten the four bolts.
5. Check the tension of the belt driving the X-axis (on the gantry). The belt
should be taut, with no slack or slop. If the belt is loose:
a. Loosen the two bolts at the right side of the gantry holding the belt
follower pulley to the gantry.
b. Using an Allen wrench as a lever, push the follower pulley to tighten the
belt.
c. Holding the belt taut, tighten the two bolts
