WHAT IS CUTTING FEED ? HOW TO USE IT

where we can use feed -

G01 - Linear interpolation

G02,G03 - Circular interpolation

For milling - 

         1 - Feed per minute (G94) after F , specify the amount of feed of the tool per minute

         2 - Feed per revolution (G95) after, specify the feed of tool per spindle revolution

For turning -

        1 - Feed per minute (G98) after F specify the amount of feed of the tool per minute

        2 - Feed per revolution (G99) after F specify the feed of tool per spindle revolution

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FEED PER MINUTE - 

milling tool 

when we use G94 the amount of feed of tool per minute is to be directly specified by number after feed it is a modal code once G94 active it is valid till when you give G code for feed per revolution G95

FEED PER REVOLUTION - 

After specifying G code for feed per revolution the amount of the feed of the tool per spindle revolution is directly specified by setting a number after F G code foe feed per revolution is modal code once g code is active its valid until you give g code for feed per minute here some example how G95 in milling and  G99 in turning is used-

WHAT IS CUTTING SPEED BY ASHU

WHAT IS CUTTING SPEED ?

HOW IT WORK

                               TODAY I WILL GIVE U INFORMATION ON HOW TO USE CUTTUNG SPEED WHICH IS GIVEN BY INSERT MANUFACTURER ON THE BACK SIDE OF INSERT BOX IF U WORKING ON CNC MACHINE THEN YOU KNOW WHAT I AM TALKING ABOUT

SO LETS GET START

Speed of the tool with respect to job when the job (work piece) is cut is called the cutting speed.

FOR MILLING MACHINE -

milling machining

suppose we machining work piece with a tool 120mm in diameter at a cutting speed of 80 m/min

The spindle speed is approximately 212 min-1, we can calculate from N=1000*v/3.14*D

 

N=spindle speed

D=diameter of cutter

V=cutting speed

        N=1000*80/(3.14*120) = 212.3

now you understand how to use cutting speed in milling machine

FOR LATHE CUTTING:

LATHE MACHINING

when a job 200mm in diameter should be machined at a cutting speed of 300m/min

the spindle speed is approx. 478min-1  which is obtained from N=1000*v/3.14*D

               N=1000*300/(3.14*200)= 477.07

NOTE:-

                   when the workpiece diameter is changed, the cnc changes the spindle speed 

so that the cutting speed remains constant

THANKS ANY QUESTIONS FEEL FREE TO ASK

How to make G72 cycle for face

Hey guy first i give u example
Suppose we want to face round bar dia of 100mm

What we do write the program
G72 W1 R0.5
G72 P10 Q20 W0.1 F0.3

Meaning G72 is facing cycle

W1- Depth of cut z axis means 1 mm  material will be remove every pass

R0.5- Retract to starting position means after every pass tool come +0.5 in z axis and come  to starting position

Next line

P10 - Starting block

Q20- Ending block

W0.1- This means after cycle finish only 0.1 mm material balance for finish pass

F0.3- Feed

Eg-  N1 TO1O1
        G54
        G99 S1000 M3
        G0 X101 Z50
        G0 X101 Z2 ( STARTING POSITION )
        G72 W1 R0.5
        G72 P10 Q20 W0.1 F0.3
      N10 G0 Z0 ( This is our final value Z0)
       N20 G01 X0( Ending block )
       G0 Z100
       M5    (spindle stop)
       M30(end of block)