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Topics covered in this post:
A closer look at Stepper Motors
A closer look at Stepper Drivers
A closer look at Arduino Mega 2560 & Clones
A closer look at Ramps 1.4 Shield
A closer look at Reprap LCD Controller and associated paraphernalia
Assembling the Electronics
Setup motor wiring
Install Drivers: Powering the ramps shield.
Connect your motors
Connect Limit Switches
Connect Heated Bed
Connect Hot End / Extruder
Software & Firmware…
If your Uno came without GRBL, or you want to start fresh or upgrade to a newer version, here are some upload steps.