min CNC

Contraptor

open source DIY rapid hardware prototyping

• About
• Contraptions
  • Mini CNC
  • XY plotter
  • Fast drilling contraption
  • Mini router
• Make
  • Perforated angle
  • Sliding elements
  • Linear rail
  • Linear bearings
  • Shaft mount
  • Motor mount
  • Belt clamp
  • Lead nut mount
  • Coupling nut clamp
  • Captive nut
  • Limit switch
• Kits
  • Structural Kit A
  • Linear Motion Kit A
• Learn
  • Contraptor Basics
  • Sketchup Tutorials
  • Motion Control
• Contribute
  • Component design
  • Metric version
  • Nomenclature
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Mini CNC

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Description

Mini CNC machine that uses Dremel rotary tool.

• Axis travel:
  • X (left-right): 6" or 150 mm
  • Y (front-back): 8" or 200 mm
  • Z (up-down): 3" or 75 mm
• Feedrate
  • All-thread rods with Delrin nuts and flywheels
    • • XY: 30 IPM or 750 mm/min
      • Z: 20 IPM or 600 mm/min
• Accuracy: estimated 0.01" or 0.25mm
• Materials: wood, plastic

Version Info

• Mini CNC v2 (current)
• Mini CNC v1

Source Files

• Sketchup

Built From

• Structural Kit A
• Linear Motion Kit A
• Electronics & Motors Kit A
• Skin Kit A (optional)

In Action

More Pics

Projects

• Mini CNC enclosure
• Mini CNC table

Components and Parts

Only mechanical components are listed, no skin or electronics.

qty	components
8	angle-1
13	angle-2
5	angle-3
10	angle-4
7	angle-6
6	angle-9
6	angle-12
6	angle-18
2	sliding-element-1
2	sliding-element-2.5
4	linear-bearing-v2-2.5
2	linear-bearing-v2-3.5
20	linear-rail-support
2	linear-rail-v2-12
2	linear-rail-v2-18
6	shaft-mount
4	delrin-nut
4	leadnut-mount
3	motor-mount-NEMA23
1	dremel-mount

qty	parts
2	pulley-XL10T
6	bearing-R188-2RS
2	bearing-thrust-025
1	belt-XL-240
6	coupling-jaw-hub-025
3	coupling-jaw-spider
3	threaded-rod-14
1	threaded-rod-22
18	nut-025(hex)
8	nut-025(nylon)
32	nut-025(square)
154	nut-1024(hex)
6	nut-1024(nylon)
25	screw-1024-0375
119	screw-1024-05
6	screw-1024-075(nylon)
7	screw-1024-1
3	screw-1024-2
8	screw-632-025
8	washer-10
14	spacer-025-0125(nylon)
12	washer-10(rubber)
6	grommet-10-0125(rubber)

qty	custom parts
1	acrylic table 6x8

Assembly

Tools

The following tools are recommended to assemble mini CNC (list may be incomplete):

• Hex or Allen keys (imperial from 1/16" to 1/8")
• Combination wrench (imperial 3/8" and 7/16")
• Hex socket (imperial 3/8")
• Needle nose pliers
• Screwdriver (phillips)
• Small screwdriver (flat)
• Try square or equivalent tool
• Measuring tape

Assembly Instructions

PDF

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