3D Tech Works
Custom Benchtop CNC Machines and Supplies
Technology for a 3D World 
OpenBuilds C-Beam Machine
At a Glance:

Machining Area X=300mm x Y=280mm Z=80mm

NEMA23 Motor Lead Screw Drive on all Axes

Integrated Electronics (fully assembled version)

Parts Packages starting at $995

Fully Assembled and Tested Starting at $1995

Router, Laptop, and Acrylic Side Panels not included

The C-Beam Machine is an entry level CNC router platform designed by the OpenBuilds team.   This mini machine is designed for doing small carvings and signs under 1 square foot.  C-Beam extrusions form the axis actuators.  The C-beam profile provides amazing rigidity with little weight.  The actuators are lead screw type with 200 step/revolution NEMA 23 motors for maximum accuracy and robustness.  The Y-Axis actuator has a nominal length of 500mm.  Travel is somewhat less than the overall length to allow for width of the carriage, etc.

The X- and Y- axes ride on a wheeled gantry with v-wheels on the track.  X-Axis has a 6 wheel gantry, while the Y-Axis has 4 wheels.  The wide wheel spacing provides maximum strength and stiffness, while allowing the carriages to move freely.  The Y-Axis actuator mounts on the base, and has a table attached which moves in the Y plane rather than a moving gantry.  The X-Axis gantry is also 500mm length, fixed in place and supported by two piece extruded side supports rigidly attached to the base.  The X-Axis gantry moves left to right on a C-Beam actuator, and supports the Z-Axis actuator.  The X- and Z- Axes are both lead screw driven with NEMA 23 motors.

The Z-Axis is 250mm in length, with wheels internal to the C-Beam actuator.  It has a mount for a standard palm router.  It has full length travel of around 100mm, which allows for milling of fairly tall objects.   The Z-Axis actuator is adjustable vertically to accomodate thicker workpieces.

An MDF panel screws onto the Y-Axis gantry plate, and a second spoiler board is mounted on top of the panel.  This board can easily be swapped out as it becomes damaged when routing.  

Electronics on the fully assembled version are our own modular electronic panel which mounts right on the back of the machine.  This give maximum versatility, ease of service, and minimal fussing with cables and connections.  Only 2 cables need to be connected, power and USB.

The fully assembled system comes tested and calibrated, and includes a 24V, 250W power supply, Arduino preprogrammed with GRBL, 3 Stepper Motors and Drivers, and USB Cable.  E-Stop switch and router mount is also included.  Router spindle and tooling is not included, but can be supplied as an option.  G-Code software, 3D Cad software, and incidental software are included or available for free download.

A kit version is also available which comes as a parts kit for the mechanical parts only.  Electronics, power supply, router, and wiring is not included, sold separately.  For those who prefer to build their own machine and customize it to their preferences.


  • Power: 24VDC, 250W max.  100-132VAC input
  • Resolution :  Basic .04mm/step @200steps/revolution.  Changing to microstep drive will increase resolution, at the expense of speed and torque.
  • Axis Travel: 300mm (X-Axis) x 280mm (Y-Axis) x 100mm (Z-Axis) approximately.  Max workpiece height 32mm.  


  • Dewalt DWP611 Trim Router, 1.25 Hp, variable speed
  • Homing Switch Kit
  • Z axis Touch Pad
  • LED Light Ring


  • C-Beam Machine Assembled and Tested with electronics package (router not included) $1995.00 CDN
  • C-Beam Machine Kit of Mechanical Parts Only:                                                           $995.00 CDN
  • C-Beam Machine Kit of Mechanical Parts With 3 X NEMA 23 Motors:                         $1095.00 CDN
(Note:  Prices subject to change without notice.  Prices subject to fluctuation in US/CDN dollar conversion.  Prices do not include taxes or shipping and handling)

Custom options, accessories, and enhancements can be added.  Call or Email for price quote.