cnc water jet cutting machine

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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