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CNC Water Jet Cutting Machine
Designing, Fabrication, Controlling and Interfacing
Fahad Amin, Anse Tariq
Project Advisor: Dr. Khalil Aslam Awan
Department of Aeronautics and Astronautics, Institute of Space Technology, Islamabad
E-mail: amin.fahad4@gmail.com , anse789@gmail.com, khalil_awan@hotmail.com
Introduction
CNC Water Jet Cutting is a recent technology which is
taking over conventional machining methods. Our
project highlights the manufacturing of low cost 3-Axis
water jet CNC machine. This machine will conduct
water jet cutting in which high pressure and high
velocity water jet stream will be used for cutting
purpose. One most important benefit of water jet
cutting is cutting of material without changing its
intrinsic properties and therefore capable of cutting
temperature sensitive materials
This Machine has 3-Axis CNC Router table which
automatically run through CNC controller. This
machine works on G-Code, K-Cam is the software
which converts any kind of drawing into G-code and
according to that code parallel port gives signal to
motor controller and then axis moves according to
that code, so in this way manufacturing of 2-D drawing
accomplish.
Objective
A
B
 Designing and Fabrication of 3-Axis Router Table
 Designing of Water Jet Nozzle Assembly
 Driver circuits for 3-axis
 3-axis CNC controller
 2D drawing with pure water jet stream
Manufactured Machine
References
[1] Geoff Williams “CNC Robotics”
[2] www.kellyware.com/kcam/
Router Table
The CNC router table is the part of CNC machine where
cutting happens.
 We design and built a 3 axis CNC Router table with
the enough strength to sustain the pressure of water
jet cutter and produce the desire work.
 We manufacture gantry style table in which work
piece remains stationary and nozzle moves all over
the work space in 3 DOF’s.
Schematic diagram of the 3-D motion generated on the
router table is given below.
Nozzle Assembly
Figure 3. The Machine Manufactured
Figure 4. Thermo pore Cutting
Figure 6. Pumping System
There are three driver boards for running of 3- Axis
stepper motors
 Main aim was to manufacture low cost and efficient
CNC controller
 Driver circuit is a bi-polar stepper motor circuit
 Driver circuit consist of H-Bridge IC which is L298N
 3-Axis controller consist of l297 IC which a stepper
motor controller IC.
 Circuit can bear 8 A current
We explored all dimensions of this project from learning
to application level. We have successfully manufactured
3-Axis CNC router table and nozzle assembly. We have
also designed our own 3-Axis CNC controller and also
manufactured 2-D drawing with pure water jet
automatically.
Figure 10. Controller Box
Figure 1. Pro-E Model of Router Assembly
Major Parts
Figure 2. Manufactured Machine
There are six major parts of CNC water jet cutting
machine.
 Router Table
 Nozzle Assembly
 Pump System
 3- Axis Driver Boards
 3- Axis CNC Controller
 Software
 Nozzle generate accurate water stream
 Nozzle exit diameter is 1 mm
 Successful cutting of Thermo pore, Styrofoam and
Ply wood
 Flow stream is non-turbulent up to 6 cm.
Figure 5. Ply Wood Cutting
Pumping System
 Plunger Pump is used which has three valves.
 Pump can provide pressure of 700 psi.
 Three phase induction motor is used for sucking of
water and it has 2600 RPM and 15 hp.
Figure 7. Circuit Diagram of CNC Controller in Proteus
Figure 8. Driver Circuit Figure 9. 3-Axis Controller
3-Axis CNC Controller
Software
 K-Cam is used as CNC software based on G-Code
 K-Cam sends signal to controller through computer
parallel port.
Conclusion
Figure 11. K-Cam CNC Software
Figure 12. 1*1 in.square Cutting Sample