Tevo Tornado Z axis knob
thingiverse
I designed a knob to fit on the top of the Z-axis of my Tevo Tornado, allowing me to manually adjust the height. After installing a new coupling to eliminate the flex caused by the stock one, my Z-axis screw protrudes just enough from the top for a knob to be securely attached. These couplings can be purchased for under $5 and greatly improve the accuracy of layer heights. You can find the specific coupling I'm using on my Z-axis here: https://www.banggood.com/5mm-x-8mm-Aluminum-Flexible-Spider-Shaft-Coupling-OD25mm-x-L30mm-CNC-Stepper-Motor-Coupler-Connector-p-995515.html?rmmds=myorder&cur_warehouse=CN
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