Install the Z-Axis
Step 1: Attach the z-axis to the cross-slide
Slide the z-axis extrusion through the v-wheels on the cross-slide until the leadscrew is resting on the leadscrew block.
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.
![Screen Shot 2017-02-12 at 7.05.59 PM.png Screen Shot 2017-02-12 at 7.05.59 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-12_at_7.05.59_PM.png)
![Screen Shot 2017-02-12 at 7.05.59 PM.png Screen Shot 2017-02-12 at 7.05.59 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-12_at_7.05.59_PM.png)
![Screen Shot 2017-02-12 at 7.07.35 PM.png Screen Shot 2017-02-12 at 7.07.35 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-12_at_7.07.35_PM.png)
Step 2: Screw the screw
Hand rotate the leadscrew clockwise so that it threads into the leadscrew block. Continue to hand rotate the leadscrew until the z-axis is halfway down.
![Screen Shot 2017-02-12 at 8.32.57 PM.png Screen Shot 2017-02-12 at 8.32.57 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-12_at_8.32.57_PM.png)
Step 3: Install the hard stops
Tighten an M5 x 10mm screw and tee nut onto the backside of the z-axis extrusion approximately 200mm from the top of the extrusion. This acts as a hard stop between the z-axis and the cross-slide plate, which you can quickly adjust to physically prevent FarmBot from ever moving too low within its working space, which could damage something.
![Screen Shot 2017-02-27 at 1.50.18 PM.png Screen Shot 2017-02-27 at 1.50.18 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-27_at_1.50.18_PM.png)
The hard stop is highlighted orange for clarity.
Tighten another M5 x 10mm screw and tee nut onto the backside of the z-axis extrusion approximately 100mm from the bottom of the extrusion. This hard stop prevents the z-axis from moving too high.
![Screen Shot 2017-02-27 at 2.32.21 PM.png Screen Shot 2017-02-27 at 2.32.21 PM.png](/v1.2/FarmBot-Genesis-V1.2/z-axis/_images/Screen_Shot_2017-02-27_at_2.32.21_PM.png)