nut is attached to the back of the Z
carriage. Secure with two #10-24 x 1-1/4
machine screws, washers, lock washers,
and hex nuts as shown. Finger tighten
Secure the Z carriage to the four
trucks with the 16 4 mm x 16 mm
machine screws you removed earlier.
Remember to add the lock
washer/washer combo to the screw as
shown in Figure 8.
Once the carriage plate is secured to
the four trucks, move it all the way to the
top and snug the upper screws. Next,
move the carriage plate to the bottom
and do the same with the lower screws.
Once you are happy with the movement
of the carriage, tighten all the screws.
Install Motor Drive Assembly
Slip the Z drive assembly over the two
shafts as shown in Figure 9. Notice the
orientation of the two 1/4” hex bolts.
They should be facing the rear. You may
have to loosen the bolts a little so the
assembly slides down over the shafts.
Slide the assembly all the way down
until the bottom of the motor bracket is
about 1/2” above the X carriage as in
Figure 10. Note that as you lower the
shaft, it will meet up with the drive nut.
Twist it into place.
Tighten the two bolts shown in
Figure 11. Then, secure with the two
nuts to keep them from loosening later.
This completes the KReduCNC Z drive
assembly. Leave the drive nut finger tight
until we attach the electronics. We will
need them loose to make later
adjustments. Your CNC should look like
the one in Figure 12.
Next month, we will start hooking up
electronics so we can get each axis
SERVO 10.2016 31