Simple expandable 4 axis CNC (6 printed parts)

thingiverse

These modified stepper motors have been reworked to be Bipolar, as explained in instructables and YouTube tutorials. Using a CNC Arduino shield to control these steppers, with one stepper motor slaved to the Y axis for rotational milling purposes. The GRBL controller software, an open-source program, is used to operate the system. The X-axis is suspended from the Y axis, creating a unique setup. You can design and create your own pen holder or milling head according to your needs. Contents Instructions and Parts List: 1 Instructions: 1 Linear Bearing: 1 Guide Rods: 2 10x24 Long Coupling Hex Nut: 3 10X24 Coarse Zinc Plated Threaded Rod: 3 Coupling Shaft from Geek: 3 28BYJ-48 Stepper Motor with Controller: 4 Arduino Nano/Micro: 4 Additional Ideas: 4 Instructions and Parts List: Instructions 1. Feel free to modify these parts as you see fit. 2. Next, print out the required components. 3. Assemble the parts against a straight edge. 4. Grease the guide rods with Teflon paste (garage door grease). 5. Linear Bearing 8mm Core, 1.5 cm Diameter, 2.5 cm Length 6 dollars for 12 at Geek Guide Rods Ace Hardware Stainless Steel Rod Stock. 5/16” rod stock from hardware store Geek | 10 PCS MR105ZZ (5x10x4 mm) Metal Double Shielded High Precision Ball Bearing 2 dollars for 10 10x24 Long Coupling Hex Nut 10X24 Coarse Zinc Plated Threaded Rod Coupling Shaft from Geek 28BYJ-48 Stepper Motor with Controller Arduino Nano/Micro Additional Ideas Coupling nut with holes to tap: lowes.com/pd/The-Hillman-Group-20-Count-5-8-in-Zinc-Plated-Standard-SAE-Regular-Nuts/4293807 Limit Switch There are dozens of different kinds of whisker, lever arm etc. Here is one kind.