- Step 1: Attach the stepper motor to the Z-axis motor mount
- Step 2: Attach the motor mount to the Z-axis extrusion
- Step 3: Attach the shaft coupling
- Step 4: Attach three cable carrier supports
- Step 5: Attach the vacuum pump cover
- Step 6: Attach the vacuum pump
- Step 7: Attach one more cable carrier support
- Step 8: Attach the z-axis to the cross-slide
- Step 9: Install the hardstops
- Step 10: Add the vertical motor housing (optional)
- What’s next?
This is the estimated time it will take to assemble the z-axis.
Handle with care
The aluminum extrusions may have sharp corners and edges.
Slide the shaft coupler onto the motor shaft and tighten the top screw with the 2.5mm hex key.
Mind the gap
Make sure there is a small gap (about 2mm) between the shaft coupling and the z-axis motor mount. You might use a credit card to help provide the correct spacing needed.
Fasten the vacuum pump to the vacuum pump mount using two 200mm zip ties. Then attach the vacuum pump mount to the z-axis extrusion using a 60mm nut bar and two M5 x 16mm screws. The mount should be butted up against the vacuum pump cover.
Adjust the eccentric spacers as needed
In order to slide the z-axis through the v-wheels you will need to adjust the eccentric spacers of the three v-wheels on the right side of the cross-slide. Refer to the eccentric spacer adjustment reference guide for how to do this.
Attach the z-axis hardstops onto the back side of the z-axis extrusion approximately 200mm from the top of the extrusion and 100mm from the bottom of the extrusion using M5 x 10mm screws and tee nuts. Later, you can quickly adjust these to physically prevent FarmBot from moving too low or too high within its working space.
If you plan on stopping assembly after this page, it is recommended to attach the vertical motor housing to the z-axis extrusion using M5 x 10mm screws and tee nuts now. This will protect the motor from rain and other hazards until you resume assembly at a later point. Once you resume assembly, you will need to remove the housing.
If you do not plan on stopping the assembly process now, you can skip this step and install the housing after the z motor and encoder cables have been connected in the next step.