Building a Benchtop CNC -Part 2 - Z-Axis

Building a benchtop cnc from 8020 extruded aluminium, and some salvaged parts. This one is stepper motor driven.
In this part I construct and assemble the z axis

Metal cutting saw used in video provided by Evolution Power Tools: http://amzn.to/2xzrtgY

Part 1:    • Building a Benchtop CNC -Part 1 - Y-Axis  
Part 3:    • Building a Benchtop CNC -Part 3 - X-Axis  
Part 4:    • Building a Benchtop CNC -Final Part-Contro...  

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Makita cordless Power drill: https://amzn.to/2KwRs0d
Makita cordless impact driver: https://amzn.to/2uVhhTC
Makita cordless Circular saw: https://amzn.to/2JzjZS7
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12" Diablo combination table saw blade: https://amzn.to/2uZMRzR
Mirka Abranet sanding discs: https://amzn.to/2JyjS9F

Audio video equipment:

Video Camera: Panasonic HC-X920: https://amzn.to/2Kx6fb3
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Studio Mic: Marshall MXL 990: https://amzn.to/2jpB3OEh