one pulley can be seen in Figure 4.
3. Z Axis Mount. Attach the two 12
inch aluminum Z axis channels to the base.
Figure 5 shows a close-up of the
attachment, and the completed subassembly
can be seen in Figure 6.
4. Z Axis Trolley. Two XL timing belt
mounts are fixed to the left and right sides
of the Z axis trolley. The trolley itself holds
the printer’s build plate. Two 1.5” aluminum
channels are used for holding the XL timing
belt mounts as shown in Figure 7. An
upside down view of the assembled trolley is
in Figure 8. Once the trolley is complete,
Figure 9 shows it being slid down from the
top of the printer.
5. Z Axis Trolley Mount. The two
remaining timing pulleys are added in this
step. One pulley is mounted on the stepper
motor. This motor/pulley subsystem is then
embedded inside one Z axis channel. The
SERVO 05.2015 57
Figure 5. Mounting the Z axis to the base.
Z Axis Parts List
2 - Aluminum channel 12"
2 - 16T . 25" bore flanged XL timing pulley
#615378
4 - 1/4" x 1/2" flanged ball bearing #535198
2 - 2.375" x . 25" stainless steel D-shafting
#634072
4 - 1/4" bore aluminum collar (clamping)
#6157K12
Z Axis Mount
Parts List
2 - Dual channel flat bracket #585422
2 - Channel connector plate A
16 - Socket head cap screw 6-32 3/8"
2 - 6-32 tapped stainless steel screw plate
.770 x .770 (square) #585478
Z Axis Trolley
Parts List
2 - Aluminum channel 9" #585450
3 - Aluminum channel 1.5" #585440
8 - 6-32 attachment blocks #585400
1 - Round base A #585438
2 - Channel connector plate A
1 - Stainless steel screw plate .770 x .770
(round) #585476
2 - XL belt mount A (stainless steel) #585502
4 - Flat head Phillips machine screw
6-32 3/8"
8 - Socket head cap screw 6-32 1/4"
24 - Socket head cap screw 6-32 3/8"
Figure 7. Two 1.50" aluminum channel pieces are the XL belt mounts.
Figure 6. Z axis complete.
