3 Axis Motorized PIC Machine

4/20/11

Introduction

• Computer Numerical Controlled (CNC) Milling machines aresome of the most fascinating products of the manufacturingindustry.

• The 3-Axis Motorized PIC Machine is similar to the CNCMilling machine in every aspect except that it is controlled bya programmable instruction chip (PIC) instead of a userinterface.

• 3-axis motorized apparatus (using bipolar stepper motors), acontroller (using microchips and pushbuttons), and a liquidcrystal display (LCD).

Abstract Highlights

Similar to a computer numerical controlled (CNC) machine

Controlled by a programmable instruction chip (PIC)

The main goal of this project is to build the motorized stages and control them by using a microchip 16f684.

Figure. 11

Work Breakdown Structure

Assignment Matrix

Team Member

Assignment Discipline

Briana

McCall

Responsible for the aspects of the LCD Display as well as the

electrical components.

EET

Raymond

Bryant

Responsible for the electrical components& programming of

the stepper motor.

EET

Roger

Smith

Responsible for the mechanical components & design of the

3-Axis Motorized PIC machine.

MET

Final Design

3-Axis

Cutting

MachineStepper Motor 3

Z-Axis

Controls movement of

the dremel motor; up

and down.

Stepper Motor 2

Y-Axis

Controls movement of

the stage; in and out.

Stepper Motor 1

X- Axis

Controls movement of

the stage; left and right.

Inputs from the

pushbuttons are sent to

the PIC16f684 and

implemented in the

stepper motors.

Receive inputs from

pushbuttons and carry

them out in the stepper

motors.

PIC16f684 Continuously run of the

desired stepper motor

until a pushbutton is

released.

LCD &

Pushbuttons Once information is

sent to the stepper

motors it will also

display stepper motor

action in the LCD

Figure. 1

3-Axis Motorized PIC Machine

Main components

• 3 stepper motors, Dremel, LCD, 4 microchips (PIC16f684)

Dremel motor tool does the cutting

LCD & pushbuttons control parameters of the stepper motor

4 Microchips (16f684) control the entire operation, such as receiving inputs from the

LCD and translating it to the stepper motors.

• From a top isometric prospective

• 2 motors will control the stage (up & down, and left & right),

• The other control the motor tool (in & out)

Construction

Making bearing fixtures

Programming the LCD

Mounting stepper motorson the axes

Construction (cont.)

Programming the stepper motor

Repairing bearing fixtures on the Z-axis

Drilling holes in aluminum rails

Troubleshooting of the h-bridge circuit

Construction (cont.)

Designing the 3-Axis Motorized PIC Machine

Measuring the Z-Axis rails

Drilling holes into aluminum rails

Mounting the Z-Axis stage

Construction (cont.)

Foundation

X-& Y- Axis Stages

Aligning all axes

Mounting Dremel tool

Assembly Drawing

Fig.2 Isometric View of the 3-Axis Motorized PIC Machine

Fig. 3 Exploded View of the 3-Axis Motorized PIC Machine

Exploded View With Materials

Front Views

Figure 4. CAD & Solid Edge Drawings in Front View.

Side Views

Figure 5. Solid Edge & CAD drawings in Side View

Top Views

Figure. 6 CAD & Solid Edge Drawings in Top View

Exploded View

Figure. 7 Solid Edge Drawing in Exploded View

Figure. 8 Detail View Showing How the stage is mounted on the X-Axis

X-Axis View

Y-Axis View

Figure. 9 Detail View Showing How the stage is mounted on the Y-Axis

Z -Axis View

Figure. 10 Detail View Showing How the Dremel Tool is Mounted.

LCD Schematic

Figure. 12

Stepper Motor Schematic

Figure. 13

LCD

Flo

w C

hart

Figure. 14

Step

per M

oto

rF

low

Ch

art

Figure. 15

Actual Project

Figure. 16

Success Criteria & Factors

• Teamwork makes a project works.

• Use Time wisely.

RisksDesign Issues Resulting from Materials

Size of the Machine

Longevity of the motor

Availability of the parts

Time & Deadline

Future Goals

Utilize optical sensors for human safety

Operate using G-Code and a computer interface

It has been a pleasure learning from you.Email address: briana_bsm@yahoo.com