[jrobson]

Can someone point me to some documentation that properly explains G2/G3 coding on 5T/6T Fanuc controllers with tool nose radius compensation?

[tobyaxis]

This book will help you and it's not cheezy. It will explain things so you can understand.

http://www.amazon.com/gp/product/013...e=UTF8&s=books

It also goes over the tool tip selections for using TNRC (Tool Nose Radius Compensation)
Example: is a Fanuc 10T
%
O0086
(TURBINE SPLINE 27SPL)
(GM 200 TH200R4)
(MATERIAL=4140)
(PILOT=1.375D)
(ID=.814D)
(DRWNG=SPLINEA.CAD)
(OP#1)
(DATE 8/1/03 PGMR TJD)
(DATE REV 1/27/04 TJD)
(T1=CNMG432 VALINITE SV330 T3)
(T3=DNMG431 SECO FF1 CM T3)
(T5=DRILL 3/4 135SPT COB STUB)
(T7=B-BAR 1/2 CCMT21.51F2 TP1000 T2)
(SECO CARBOLOY)
(JAWS=400 PRESS=20)
(CYCLE TIME=MS)

G0 G40 G97 G99 T0 M5
G28 U0 W0 M9
G50 S2000 M41
M1

N1(REMOVE SKIN/R-FACE/TURN)
G28 U0 W0 T0
T101 M8
G96 S475 M4
G0 G42 X3.99 Z.3
G1 Z-1.3 F.01
X4.05 F.015
G0 G40 X4.1 Z.2
G72 P10 Q15 W.005 D400 F.008
N10 G0 G41 Z0
N15 G1 X0 F.004

G0 G40 X4.0 Z.1
G71 P20 Q25 U.02 W.002 D850 F.01
N20 G0 G42 X1.0
G1 Z0 F.0025
X1.325 F.003
G3 X1.375 Z-.025 R.025 F.0025
G1 Z-.75 F.004
X2.75 F.0035
X3.975 Z-.9141 F.0025
G1 Z-1.08 F.004
N25 X4.1 F.0035

G0 G40 Z.1 M9
G28 U0 W0
G97
T0
M1

N2(F-FACE/TURN/U-CUT)
G28 U0 W0 T0
T303 M8
G96 S650 M4
G0 G41 X1.5 Z0
G1 X0 F.004

G0 G40 X4.1 Z.1
G70 P20 Q25
G0 G40 Z.1

(U-CUT)
G1 X1.3755 Z-.725 F.05
Z-.755 F.004
G4 U1.0
G1 Z-.75 F.006
X2.8 F.003

G0 G40 Z.1 M9
G28 U0 W0 M5
G97
T0
M1

N3(DRILL)
G28 U0 W0 T0
T505 M8
G97 S400 M3
G0 X0 Z.25
G1 Z-2.25 F.0072
Z.05 F.2

G0 G40 Z.1 M9
G28 U0 W0
G97
T0
M1

N4(R-BORE )
G28 U0 W0 T0
T707 M8
G96 S400 M3
G0 G40 X.75 Z.1
G71 P40 Q45 U-.02 W.002 D320 F.0075
N40 G0 G41 X1.214
G1 X.814 Z-.1 F.003
Z-1.3 F.005
N45 X.75

G0 G40 Z.1 M9
G28 U0 W0
G97
T0
M1

N5(F-BORE)
G28 U0 W0 T0
T707 M8
G96 S550 M3
G0 G40 X.75 Z.1
G70 P40 Q45

G0 G40 Z.1 M9
G28 U0 W0
G97
T0

M30

If your Control sets tools with a G50 I'll post an example for that one as well.
:cheers:

[jrobson]

Hi

Thank you!

Yes our control sets with G50.

Regards,
Jonathan.

[tobyaxis]

Here is a simple example of a program with G50. Do you know how to set your tools with G50 yet? If not I'll post instructions too.

%
O1154
(IKEGAI FANUC 6T)
(ANTI-BALLOONING PLATE)
(DRWNG=ABPLC1.CAD)
(MATERIAL=SAE 1018)
(5.0D 1.075L)
(OP1)
(DATE 1/15/04 PGMR TJD)
(DATE REV 1/15/04)
(LAST RUN)
(T1=CNMG432 VALENITE SV330 T3)
(T2=DRILL 1.0D INDEX)
(T3=DNMG431 SECO FF1 CM T3)
(T4=B-BAR .5D CCMT21.51-F2 TP1000 T2)
(T5=B-BAR 1.0 D .0312R T2)
(JAWS=400 PRESS=18)
(CYCLE TIME= MS)

G0 G40 G97 G99 M5
G28 U0 W0 M9
G50 S2000 M39
M1

N1(R-FACE/TURN)
G28 U0 W0
T0100
G50 X(RP) Z(RP) M8
G96 S525 M3
G0 X5.2 Z.2 T0101
G72 P10 Q11 W.005 D400 F.008
N10 G0 G41 Z0
N15 G1 X0 F.004

G0 G40 X5.2 Z.1
G71 P20 Q25 U.02 W.005 D750 F.01
N20 G0 G42 X4.765
G1 X4.985 Z-.01 F.0025
Z-.75 F.004
N25 X5.2 F.0035

G0 G40 Z.1 M9
G0 X(RP) Z(RP) T0100
G28 U0 W0
G97
M1


N2(DRILL)
G28 U0 W0
T0200
G50 X(RP) Z(RP) M8
G97 S2400 M3
G0 X0 Z.2 T0202
G1 Z-1.125 F.0025
Z.05 F.2

G0 G40 Z.1 M9
G50 X(RP) Z(RP) T0200
G28 U0 W0
G97
M1

N3(F-FACE/TURN)
G28 U0 W0
T0300
G50 X(RP) Z(RP) M8
G96 S650 M3
G0 X5.2 Z.2 T0303
G70 P10 Q15

G0 G40 X5.2 Z.1
G70 P20 Q25

G0 G40 Z.1 M9
G0 X(RP)Z(RP) T0300
G28 U0 W0
G97
M1

N4(R-BORE)
G28 U0 W0
T0400
G50 X(RP) Z(RP) M8
G96 S400 M3
G0 X1.0 Z.1 T0404
G71 P40 Q45 U.02 W.02 D320 F.0075
N40 G0 G41 X4.6628
G3 X1.975 Z-.3 R2.5 F.0035
G1 X1.875 Z-.35 F.0025
Z-.43 F.004
X1.518 F.0035
X1.483 Z-.455 F.0025
Z-.9 F.004
N45 X1.0 F.0035

G0 G40 Z.1 M9
G0 X(RP) Z(RP) T0400
G28 U0 W0
G97
M1

N5(F-BORE)
G28 U0 W0
T0500
G50 X(RP)Z(RP) M8
G96 S550 M3
G0 X1.0 Z.1 T0505
G70 P40 Q45

G0 G40 Z.1 M9
G0 X(RP)Z(RP) T0500
G28 U0 W0
G97

M30
%

[jrobson]

Hi there

Yes I have no programming problems, simply that with G2/G3 I can't calculate I and K properly...

[jrobson]

On the 6t it is usually okay, but on the 5t very difficult. In the past someone did the G2/G3 for me via mastercam or edgecam or something however this is no longer a option.

[tobyaxis]

You don't need I and K for that control. Use "R" letter address, it will work.

[tobyaxis]

On the 6t it is usually okay, but on the 5t very difficult. In the past someone did the G2/G3 for me via mastercam or edgecam or something however this is no longer a option.

I have some free time and could help you with this if you would like.

[jrobson]

Hi

On the 5T there is no R only I/K...
If you can help I would really appreciate it as I have no idea how to calculate it properly...

[tobyaxis]

Ok that is an older control. I never use "I" and "K", but I'll figure it out. How does the machine read "I" and "K" Absolute or Incremental? This is very important to know when programming. What Machine Tool is It? Tsugami, Nokamora Tome, Ikegai, Mori Seiki, Hitachi Seiki, or Dainichi?

Before I forget go to www.ncplot.com this will help you to view your programs before sending them to the Lathe. It also will help you to learn to hand code.

[jrobson]

Hi

Thanks I will look at the link, I and K are absolute, machines are Ikegai and Mori Seiki, Hitashi Seiki and Wasino are both 6t.

[tobyaxis]

Ok I will post a simple drawing and G-Code using "I" and "K"

[jrobson]

Thanks!

[tobyaxis]

This should be what you need.
O0000
(IKEGAI FANUC 6T)
G0 G40 G97 G99 M5
G28 U0 W0 M9
G50 S2000 M39
M1

N3(F-F/T)
G28 U0 W0
T0300
G50 X(RP) Z(RP) M8
G96 S650 M3
G0 X4.2 Z.1 T0303
G42G1X0.F.025
G1Z0.F.006
X0.5
G3X1.Z-0.25I0.K-0.25
G1Z-0.75
G2X1.5Z-1.I0.25K0.
G1X3.5
X4.Z-1.25
Z-4.
X4.1F.025


G40 G0 Z.1 M9
G0 X(RP) Z(RP) T0300
G28 U0 W0
G97
M1

Sorry it took so long a Client called. Follow the program from X0 Z.1

[tobyaxis]

I just sent you my email address if you need additional help with this.
:cheers:

[jrobson]

Hi

Yes that is logically correct the way I see it and the way I calculate it as well, however if you take that same drawing, run it through something like edgecam and compensate for the tool radi it looks completely different(ex:G3 X1.004 Z-0.291 I0.081 K-0.211) , what sometimes happens with a code like yours is that the circular bit isn't 100% smooth, it usually has a ridge, once the code is changed to the figures from the computer it is smooth.

[tobyaxis]

Hi

Yes that is logically correct the way I see it and the way I calculate it as well, however if you take that same drawing, run it through something like edgecam and compensate for the tool radi it looks completely different(ex:G3 X1.004 Z-0.291 I0.081 K-0.211) , what sometimes happens with a code like yours is that the circular bit isn't 100% smooth, it usually has a ridge, once the code is changed to the figures from the computer it is smooth.

What do you mean smooth? Are there flat spots at the largest points in the diameter. I recieved your email and Iges file. The arc segments are 90 degree and 180. I hope this works for you.
:cheers:

%
90 DEGREE ARC SEGMENTS
NOTICE THE G3 HAS TW0 LINES OF
G-CODE

****NOTE****
TO USE TOOL NOSE RADIUS
COMPENSATION YOU MUST CHANGE
TOOL TIP REGISTER TO T8

SET THE RADIUS "R" TO THE TOOL NOSE
RADIUS YOU ARE USING EX. VNMG431 HAS
A .0156 TNR R=.0156

G3 IS MODAL UNTIL CHANGED

N3(F-F/T VNMG431 SECO FF1 TIP 8)
G28U0W0T0
T303M8
G96S650M3
G50X(RP)Z(RP)
G0X12.7Z2.54
G42G1X2.54Z0.F.015
Z-1.6829F.008
G3X9.Z-6.I-1.27K-4.3171
X2.54Z-10.3171I-4.5K0.
G1Z-10.73
X12.7F.015

G0G40Z25.40M9
G50X(RP)Z(RP)
G28U0W0
G97
T0
M1
_____________________________

180 DEGREE SEGMENT

N3(F-F/T VNMG431 SECO FF1 T8)
G28U0W0T0
T303M8
G96S650M3
G50X(RP)Z(RP)
G0X12.7Z2.54
G42G1X2.54Z0.F.015
Z-1.6829F.008
G3Z-10.3171I-1.27K-4.3171
G1Z-10.73
X12.7

G0G40Z25.4M9
G50X(RP)Z(RP)
G28U0W0
G97
T0
M1
%

[lakeside]

what the ridges jrobson is refeering to, is the end point of the r value the tool is stopping for a milla-second before completing move (look a head) with I and J the move is a full motion-a full block of code

[tobyaxis]

what the ridges jrobson is refeering to, is the end point of the r value the tool is stopping for a milla-second before completing move (look a head) with I and J the move is a full motion-a full block of code

Some Lathes do not accept a full 180 degree radius move, at least probibly not his. It's pretty old. The 1984 Ikegai Fanuc 6T might, but I never got a part with this type of geometry to try it. Here is the drawing Mike.
Seems it won't post here. Sending to your email.

[Navigator]

To count I and J (in turning applications K) you just need to calculate each axis movement,that's all... related to the quadrant and direction... I know how to calculate it but still have a problem with right signs definitions ...accordingly to the direction does anyone knows about it? thank you in advance...