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Step 6d Carefully slide the Stepper Motor Shaft
into the Aluminum Helical Coupler. Then
fit the tabs of the Carriage Frame
Assembly into the slots in the Z Stepper
Motor Mount and secure with four M4 x
16 Machine Screws and Nuts.
Step 6e Carefully tighten both set screws on the
Aluminum Helical Coupler against the
Stepper Motor Shaft.