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Compound Cycle Tapping on Okuma Lathe

April 27, 2012, 11:56 am by Eldar Gerfanov (Admin)

Cycle Format:

G184 X Z C K (I) F Q E
OR
G184 X (Z) R C K (I) F Q E

G180 (Cancel)

  • X:
    For face operation: Start Position
    For side operation: Target Diameter
  • Z:
    For face operation: Target Position
    For side operation: Start Position
  • C: C-Axis index position
  • I: Shift from G00 for SIDE operation only
  • K: Shift from G00 for FACE operation only
  • F: Feedrate
  • E: Dwell
  • R:
    For face operation: Depth of hole, Negative
    For side operation: Diameter
  • Q: Number of holes to repeat

Example:

Code:"OKUMA SIDE TAPPING SAMPLE PROGRAM"
O1
(12607T020-AAAQ PART BEGIN)
G50 S2000
N300 G0 X100. Y50.
M110
NAT10
G94 M146 M8
G17
M0
(T10-29 10-24 TAP)
G0 X10.838 T1024 SB=300
M13
G0 Z-0.375
G101 X9.238 F200.0
G184 X7.538 Z-0.375 I0.2 C0 F12.5
G180
G0 X10.838
C30.
G101 X9.238 F200.0
G184 X7.538 Z-0.375 I0.2 C30. F12.5
G180
G0 X10.838
M146
G136
G95 M12 M9
M109
G0 X100. Z50.
M1
TLID
(12607T020-AAAQ PART END)
M2

FS Wizard: Dormer Drill test on T6061 Aluminum

April 23, 2012, 7:22 pm by Eldar Gerfanov (Admin)

As part of FS Wizard's development. 2 drills were tested today on T6061 Aluminum.

0.312 Dia and 0.390 Dia Dormer A002 Drill Jobber Drill with TiN coated tip.

Helix:30Deg

Point:Split, 118Deg.

Hole depth for both was 3.0"".

Peck equaled 1xDia

Speeds and Feeds for 0.312 Dia drill were

SFM: 250 f/min

RPM: 3062
APT: 0.00778 in/rev
Feed: 47.66 in/min
MRR: 3.6 in^3/min
HP: 0.8
Torque: 16.7 in-lb
Breaking Torque: 31.3 in-lb

Both drills performed well showing almost exacly the same Horse power consumprion as predicted for the first inch.

Between 1 and 2 inches of depth Horse power consumprion was 150% of predicted.
Between 2 and 3 inches of depth Horse power consumprion was 200% of predicted.

This means that at this depth both drills came pretty close to the breaking point.
Clearly for deeper holes either more frequient peck or lower speed/feed combination is required.

Drilling Hardox 500 55RC: 0.281 dia .75 deep

April 20, 2012, 12:47 am by Eldar Gerfanov (Admin)

Tool:0.281 dia 0 helix TIN coated carbide drill

Peck:0.125

Coolant: Air

RESULT
SFM: 49 f/min
RPM: 663
APT:  0.00070 in/rev
Feed: 0.93 in/min
MRR: 0.1 in^3/min
HP: 0.2
Torque: 19.4 in-lb
Max Torque: 22.9 in-lb

 

Test of NIAGARA 3FL HP End mill for Aluminum

February 27, 2012, 10:02 pm by Eldar Gerfanov (Admin)

Recenty ordered a 3Flute High Performance End Mill From NIAGARA.
Was very glad and slightly surprised that when punched in all of the endmill's data into my Calculator nothing broke down.I had a rason: At 5000RPM and 3/8" Deep slot cut. The feed came to around 92.0IPM. Chips were making this nice ringing noise that sounds like money.

Setup:
HAAS VM-3
Hudrolic Tribos Holder
3/4" 45DegHelix 3Flute 1.625FluteLen, 2.375"Overhang TICN HP End mill

S:5000RPM
F:92.0IPM
DOC: 0.375" Slotting
Coolant:FLOOD

The calculation was pretty much dead on.

Tapping Hardox Rc 45-50

February 27, 2012, 9:43 pm by Eldar Gerfanov (Admin)

A need arouse to drill and tap lots of blind 1/4-20 holes in 3/4" thick hardox 45-50RC hard plate.

So if you ever need to do this use:

1) DRILL
Tap hole: >0.202" or bigger.  5/8 deep.
Drill used: Tialn coated carbide drill.
S=1418 RPM
F=2.6 IPM
NO Peck, No Coolant

2)TAP
Tap: TIALN coated 4Flute PowderMetal tap from OSG.
S=100RPM
Rigid Tap Peck:0.05"
Depth: 0.40"
Used MAsters Cutting oil. Pretty standard for tapping.

 

Was able to drill/tap 16 test holes. After inspection tap did not show sings of severe wear. So its safe to assume you could make around 30 holes this way.

If you ever have to do this- GOOD LUCK Innocent

Renishaw OTS Tool Probe on Haas: Setting diameter wear offset value.

January 16, 2012, 7:31 pm by Eldar Gerfanov (Admin)

Renishaw OTS tool probe cycle for HAAS can set both length and diameter offsets.

Too bad there is no choice: it only puts absolute measured diameter of the tool into D- diameter offset and makes wear offset=0

But if your programming is done with the center of the cutter, then you actually only need the difference between actual and programmed diameters of the tool.


I.E.: When probing 5/8Dia end mill, we get D=0.6248. You would normally have to subtract 5/8 from it and leave the -0.0002 difference.

But there is an easier way

Warning:Make sure you know what you are doing.
Make sure you backup all files you are going to modify.
I simply WILL NOT care about any damage done to your machine in any case.

  • Go to settings and set  protect 9xxx programs from edit to OFF
  • Go MEM and edit program O09852 (RENISHAW DIA. SET)
  • Go to line N31 and replace
  • Code:OLD
    .....
    N31
    #[ 2400 + #7 ]=  #8 / #156
    .....

    with
    Code:NEW
    .....
    N31
    #[ 2400 + #7 ]= [ #8 - #19 ] / #156
    .....
  • Go to settings and set  protect 9xxx programs from edit to ON

Thats it.

Now when you probe tool for diameter, D offset will contain the difference between approximate Dia and actual dia of the tool.

HAAS: Making G54-G59 show Z0 at the top of fixture

November 29, 2011, 10:50 pm by Eldar Gerfanov (Admin)

Problem: Work offset G54 Z0 shows some "weird number" which is very hard to relate to.

Can we make top of fixture show Z0=0.000 ?

Solution:

  1. Go To Setting 33 (coordinate system) and Set it to HAAS. This will prevent G52 from clearing upon RESET or machine powerup and so on. (note: normal probing routines will require this setting to be Fanuk only).
  2. Find actual Z0 offset of your fixture and enter it into G52.

Thats it, from now on the value you enter into your G54-G59 Z is actual distance from top of your fixture to the top of programmed part.

Note: AGAIN this solution will not work with any of the probing software. The workaround for that will be posted later.

FSWizard: Online CNC Machinists Calculator

October 14, 2011, 8:33 pm by Eldar Gerfanov (Admin)

FSWizard Online is:

FSWizard is here

It is the most accurate Online Feeds and Speeds Calulator.

In order for every user to enjoy latest modifications and most accurate results, it is WEB Based.
This means that you can use it across all imaginable operational systems and devices.
All you need is an internet connected WEB browser.
No download or installation is required: Just visit the web page.

Also a full functioning mobile version is available.

Key Features of FSWizard:

  • Otimal Speed/Feed for particular tool/material combination.
  • Axial and Radial chip thinning.
  • RPM Reduction for extra long tools.
  • Machinig Horse Power and torque estimation.
  • Side Force and tool deflection estimation.
  • Balancing Depth Of Cut (DOC) againt Width Of Cut (WOC) and vise-versa.
  • Speed/Feed compensation for long cutters
  • On the fly INCH - METRIC conversion.
  • myCut Tool Database. Registered users can save calculations online and then retrieve them without the hassle of re-entering similar data. Each calculation has an unique ID Link and can be accessed and shared by anyone.
  • Web based, so No download or installation is needed.
  • Also Windows-based version is now available!

Interested?

Check out our FREE Online version here

Thread Turning on Okuma

March 7, 2011, 12:26 pm by Eldar Gerfanov (Admin)

G71 X Z A|I B D U H L E F J M Q

  • D=First Depth of Cut
  • U=Finish Depth of Cut
  • J=Number of threads at F
  • X=Target Depth (minor Dia of theread)
  • Z=Coord of end Point
  • A= Angle of thread
  • B= Tool Cut angle
  • H= Difference between major and minor dia of the thread
  • M= Cut pattern
  • M32= Longitudal
  • Q= Number of leads

Code
N24 (T5 OD 60DEG CW THREAD TOOL)
N00 G97 G95 S300 M3
N01 G0 X2.1 Z3.05
N02 M8
N03 G0 X1.2
N04 Z0.1538
N05 X0.7
N06 G1 X0.5 F0.076
N08 G71 X0.4 Z-0.8269 D0.01 U0.003  B29. H0.05 F0.077 M32
N09 G0 X1.2 Z-0.8269
N40 Z3.05
N41 X2.1

Note: Feed mode must be in G95(IPR)

Milling Hardox Steel Rc 45-50

January 26, 2011, 10:17 pm by Eldar Gerfanov (Admin)

Out Company used to have somebody else plasmacut cutting anvils for us.
This was expensive, plus heat generated by plasma caused already unstable anvils to warp like crazy making them very hard to grind flat.

So when foreman told me to machine one on CNC i immidately asked him to buy one of those nifty Hanita TiALN coated Varimill cutters.
Too bad they are too expensive. So the company bought same style of cutters made by Niagara. 0.5" end mill there is x3 cheaper than hanita's. Plus i believe cutting tools made to the same specs, out of the same materials are performing identical.

The machine we ve been using for this is really shaky and busted, so dont laugh at speeds and feeds that we came up with.

So basically, Specs Are:

  • Material: Hardox pre-hardened steel Rc 45-50
  • Cutter: 4 Flute, Stagger Flute TiALN coted 0.5" Micrograin Carbide End Mill, 2.5" Overall, 0.625" Flute Length, 1" overhang
  • Operation: Slotting
  • Speed: 1200 RPM
  • Feed: 4.8 IPM
  • Depth OF Cut: 0.125"
  • Plunge method: 2.5 Deg Ramp/Helix, Or Plunge into 0.281Dia pilot hole at 3 IPM
  • Coolant: Airblast + Oil
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