washer, #6 washer, #6 lock washer, and finally a #6-32 hex
nut. At this point, the nuts should only be finger tight. The
shaft supports should look like the ones shown in Figure 4.
Next, the shafts are inserted through the left frame
side and shaft supports, and two 8 mm trucks are added as
shown in Figure 5.
The shafts are pushed through to the opposite side and
secured with the set screws on the shaft supports as shown
in Figure 6.
The X carriage plate should be created from a piece of
3/4” stock. I recommend melamine coated particle board.
The plate has four holes for each truck and two holes in the
middle to mount the ACME nut. Several additional holes
were added for attaching the Z carriage later. The truck and
ACME nut holes have a 3/8” pocket so that the heads of
the hardware won’t interfere with the Z carriage (Figure 7).
The plate is secured to the four trucks with 16 4 mm x
16 mm machine screws. A #8 washer/lock washer combo is
also added as shown in Figure 8.
Once the carriage plate is secured to the four trucks,
move it all the way to the left and tighten the shaft
supports on the left side. Next, move the carriage plate to
the right and do the same. Once you are happy with the
movement of the carriage, tighten all the nuts.
This completes the KReduCNC X carriage assembly. If
you are building along with me, your machine should look
like the one shown in Figure 9.
Next month, we will add the Z carriage to the frame.
40 SERVO 06.2016
A complete bill of materials, as well as additional information
can be found on my website at www.kronos robotics.com/
kreducnc. For any questions or comments, please visit the
SERVO Magazine forums at http://forum.nutsvolts.com/