Fundamentals of CNC machining

Upon successful completion of this lesson, you will be able to: • Describe overall course goal, prerequisites, audience and course design. • Describe the difference between Subtractive Rapid Prototyping (SRP) and Rapid Prototyping (RP) and the advantages and disadvantages of each. • List the tools and equipment required for this course. • List the major lesson topics covered by this course. • List the major student resources available and the information found in course appendices. • Describe the recommended use of course materials to maximize the learning experience. • Describe in general the overall CADCAMCNC process

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Fundamentals of CNC Machining

A Practical Guide for Beginners

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ii

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iii

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iv

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v

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vi

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Safety First

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Warning

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Ø

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Chamfer

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Countersink Combined

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Reamer

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X+ Y+

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X+ Y+

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.201 250 002

𝑖𝑛 𝑚𝑖𝑛

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.25 100

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.125 in

300 003 7,500

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in/rev

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in)

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0 1 2 3 4 5

-‐X

-‐5 -‐4 -‐3 -‐2 -‐1

+X

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IV III

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Table

(Z) (X) (Y)

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Servomotor

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Z-‐

X+ X-‐

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Vise Jaw

X+

Y+

Z+

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Vise Jaw

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X+ Y+

Z+

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X+ Y+

Z+

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nd rd

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4 th /5 th

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G54 Machine

Home

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I J

X+ Y+

Z+

X+

Y+ Z+

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0.0000 0.0000 0.0000

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X+

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X+

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X+

Z+

X+

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Pre-‐Start Start/Home

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TOOL OFSET MESUR NEXT TOOL RELEASE PART ZERO SET

PRGRM CONVRS POSIT OFFSET CURRENT

COMDS

ALARM MESGS PARAM SETNC GRAPH HELP

EDIT

MEM

MDI DNC

HANDLE JOG

ZERO SET

LIST PROG

INSERT ALTER DELETE UNDO

SINGLE BLOCK DRY STOP OPT DELETE BLOCK

COOLNT ORIENT SPINDLE FWD ATC ATC REV

.0001 1

AUTO ALL AXES ORIGIN

ZERO SINGL AXIS HOME G28

SELECT PROG SEND RECV ERASE PROG

.001

1 .01 100 .1 HOME PAGE UP

END DOWN PAGE

CHIP

CHIP STOP

CHIP REV

+A +Z CLNT UP

CLNT DOWN

AUX CLNT

-Y +X

+Y

JOG LOCK -X -Z -A

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TOOLOFSET NEXT TOOLRELEASEPARTSET

EDIT

MEMMDIDNCHANDLEJOGZEROSETLISTPROG

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOPBLOCKDELETECOOLNT ORIENTSPINDLE ATCFWD ATCREV.0001

.1AUTOALLAXESORIGIN ZEROSINGLAXISHOMEG28SELECT

PROGSEND RECV ERASEPROG

.0011 01 1100.HOME PAGE

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

CLNTUPCLNTDOWNAUXCLNT

-Y +X +Y

JOGLOCK -X -Z -A

COMDSALARM PARAM SETNC HELP

POWER UP RESTART

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§

MDI DNC

T * 1

ATC FWD

EDIT

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOPBLOCKDELETECOOLNT ORIENTSPINDLE ATCFWDATCREV.0001

.001

1 .01 1100.HOME PAGE

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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EDITMEMMDIDNCHANDLEJOGZEROSETLISTPROG

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOP BLOCKDELETECOOLNT ORIENTSPINDLE ATCFWD ATCREV.0001

.0011

.01 1100

HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z CLNTUPCLNTDOWNAUXCLNT

-Y +X +Y

JOGLOCK -X -Z -A

Caution Pinch Hazard!

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§

HANDLE JOG

.01 10.

EDIT

.001

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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PRGRMCONVRS POSIT OFSET CURRENT

EDIT

.001

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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Slowly Raise Tool

.001 1.

TOOL OFSET MESUR

EDITMEM

MDIDNCHANDLEJOGZEROSETLISTPROG

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOP BLOCKDELETECOOLNT ORIENTSPINDLEATCFWDATCREV.0001

.001

1 .01 1100

HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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EDITMEM

MDIDNCHANDLEJOGZEROSETLISTPROG

.001

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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§

MDI DNC

ERASE PROG

3 M

WRITE ENTER

.0011

.01 1100

HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

Trang 90

§

.01 10.

HANDLE JOG

-B

.001 1.

PRGRMCONVRS POSIT OFSET CURNTALARM PARAM SETNC HELP

EDIT

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOP BLOCKDELETECOOLNT ORIENTSPINDLE ATCFWD ATCREV.0001.1

AUTOALLAXES ORIGINZEROSINGLAXISHOMEG28SELECT

PROG SENDRs232 RECVRs232 ERASEPROG

.0011. 01 100..1HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

-Y +X +Y

JOGLOCK -X -Z -A

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PAGE DOWN

TOOLOFSET NEXT TOOLRELEASE PARTSET

PRGRMCONVRS POSIT OFSET CURNTALARM PARAM SETNC HELP

INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOP BLOCK

DELETECOOLNT ORIENTSPINDLE ATCFWD ATCREV.0001.1

AUTOALLAXES ORIGINZEROSINGLAXISHOMEG28SELECT

PROG SENDRs232 RECVRs232 ERASEPROG

.0011. 01 100..1HOME PAGEUP

END DOWNPAGECHIP

CHIPSTOPCHIP

-Y +X +Y

JOGLOCK -X -Z -A

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.001 1.

STOP

+Z

0

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INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOP BLOCKDELETECOOLNT ORIENTSPINDLE FWDATC ATCREV.0001

.1AUTOALLAXES ORIGINZEROSINGLAXIS HOMEG28SELECTPROG SENDRs232 RECVRs232 ERASEPROG

.001

1 .01 100..1HOME PAGE

UP

END PAGEDOWNCHIP

CHIP

STOP

CHIP

-Y +X +Y

JOGLOCK -X -Z -A

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§

PAGE DOWN

TOOL

OFSET NEXT TOOL

RELEASEPARTSET

EDIT

.001

1 .01 1100

HOME PAGEUP

END PAGEDOWNCHIP

-Y +X +Y

JOGLOCK -X -Z -A

4

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PRGRMCONVRSALARM PARAM SETNC HELP

.0011

.01 1100.HOME PAGE

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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§

MEM

LIST PROG

.001

UP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

2

POSIT OFSET CURNT

O12345

O00001 O00015 O01000 O01100 O11975 O23456

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INSERT ALTER DELETE UNDOSINGLE DRY OPTSTOPBLOCKDELETECOOLNT ORIENTSPINDLE ATCFWD ATCREV.0001

.0011

.01 1100

HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

Device

Memory

USB Device

USB Media Present

POSIT OFSET CURNT

O12345

O00001 O00015 O01000 O01100 O11975 O23456

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OVERRIDES -10

PROGSENDRs232 RECVRs232 ERASEPROG

.001

1 .01 1100

HOME PAGEUP

END PAGEDOWNCHIP

CHIPSTOPCHIP

+A +Z

-Y +X +Y

JOGLOCK -X -Z -A

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OFSET NEXT TOOL

RELEASEPARTSET

EDIT

.001

UP

END PAGEDOWNCHIP

-Y +X +Y

JOGLOCK -X -Z -A

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4 th th

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th

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CDC Activated

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A A

A-‐A

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X+

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X+

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X+

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X+

Breakthrough

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X+

Breakthrough

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Turning

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1 2 3 4

1-‐Spindle

2-‐Chuck 3-‐Jaws 4-‐Part

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Upside-‐Down CCW

+Z -‐Z

+X

-‐X

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-‐X

+Z -‐Z

-‐C

+C

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+Z +X

G54

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Holder Clamp Screw Insert

I.C.

Shape

Hole

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Front

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Negative

Positive

Direction Feed

Direction

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Thickness

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2.0 500

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955 015

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Cut Direction

1

2

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2

Cut Direction

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2

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Cut Directions

Details

a b

c d

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Cut Direction

1 2

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Cut Direction

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Cut Directions

View

Caution Clearance

2

1

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Cut Directions

Details

a b

1

2

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Y+ Z+

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Z+

Finished Part Tolerance

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Y+

Z+

Stepover

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Remachining Areas

Operation(s)

X+

Y+

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Subplate

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Fixture Plate Part

Parallel

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Step

Detail

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Cutout

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1

2

3

X+ Y+

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4

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Material

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4

Surface

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Front Surface

Brass Rod

Y+

Z+

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5

Bottom Surface

Finish Dimension

Brass Rod

Y+

Z+

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6

Back Surface

Finish Dimension

Y+

Z+

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7

Left Surface

Machinists Square

Y+

Z+

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8

Finish Dimension

Y+

Z+

Right Surface

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Stop

Block

X-‐Z Plane

Y-‐Z

Plane

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A

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X+ Y+

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1

Bottom

Top Right

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G54

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Remove Alignment Pin Before Machining

Procedure

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Z+

X+ Y+

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1

Slot Thickness Stock

Top

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2

G54

X+ Y+

Z+

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Bolts

Dowel Pin Flat

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1

Front Top

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2

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5

6

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7

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Z+

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2

G55

X+ Y+

Z+

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1

Front Top Right

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3

Flange Clamp

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4

X+ Y+

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5

G55

G55

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6

th

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Front

Top

Bottom

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G54 Z+

X+ Y+

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2

A

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G55

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5

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8

G55

Z+

X+ Y+

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Top

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G54 Part

Fixture Z+

X+

Y+

G54

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X+

Y+

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Page:

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Glossary

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pass.

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#10-‐32

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Ø

Ø Ø Ø Ø Ø Ø Ø Ø Ø

Ø

Ø Ø Ø Ø Ø

Ø

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