Need help Fanuc Oi-tc G12.1 (c-axis Lathe)

[mattquadra]

I am trying to program some face milling code on a fanuc Oi-tc. The book refers to the use of the g12.1 and g13.1 when using the c-axis. I make a basic program to test the idea, and it throws the 224 error (return to reference point)

what ref point?

Can someone help, can a I get a snipit of code that works for an Oi-TC. FYI I am programming a Johnford SL-650A+C (fanuc Oi-tc)

Thx,

Matt

[dcoupar]

Why not post your code here so we can possibly find your problem.

[mattquadra]

Here is a sample of the code


%
O1000
G53 X-4. Z-42.
G28H0 (homes c-axis(spindle))
G97G99 S1200 M91 (M91 enters milling mode)
T0101 M08
M3
G00 X-4. Z.1
G12.1X2.798 Z.1 C43.841
G01 X2.798 Z.1F.012
X2.798 Z0
X2.8256 Z0 C48.857
X2.8472 Z0 C53.842
__
__
X2.7652 Z0 C98.59
X2.7264 Z0 C103.695
G13.1
X2.7264 Z.1
M09
G53 X-4. Z-42.
M5
M90 (end mill mode)
M30
%

[dcoupar]

When you turned the machine on, did you do a reference return of all axes before attempting to run the program?

[mattquadra]

yes. and when the error came up re-homed the axis. that was my thought.

[NICK1945]

I dont understand H0 i think the line should read G28C0 and C axis should move to zero after that you can put the degrees on C axis

[dcoupar]

Originally Posted by NICK1945 I dont understand H0 i think the line should read G28C0 and C axis should move to zero after that you can put the degrees on C axis

H is incremental C. Works like U for X and W for Z.

[dcoupar]

G28H0 (homes c-axis(spindle))
G50C0 <---------- TRY INSERTING THIS BLOCK HERE.
G97G99 S1200 M91 (M91 enters milling mode)

[CNCRim]

where did you get alarm at? I think M3 could be the problem too, since it mainly used for Main spindle not for live, just my guess since I don't know where about the alarm is kick in.

[g-codeguy]

Originally Posted by CNCRim where did you get alarm at? I think M3 could be the problem too, since it mainly used for Main spindle not for live, just my guess since I don't know where about the alarm is kick in.

Our Nakamura TW-20 uses M91 to initialize live tooling. M3/M4 are the correct codes for starting the live tooling spindle. M4 runs standard drill, endmills, etc. in the right direction. You must cancel the M91 in order to run the main spindle.

[g-codeguy]

Matt, might try putting the G12.1 on a separate line. Just a guess on my part. I've never tried including it in the same block as the first interpolation move so I've no idea whether or not it would make a difference.

[KIA12345]

%
01016G30U0W0
G54G28B0
T0404M54
G28H0 (homes c-axis(spindle))
G0C0
G97G99 S1200M43
M13S2420M8
G0 X4. Z.1C0.
G12.1X2.798 Z.1 C43.841
G1 X2.798 Z.1F.012
X2.798 Z0
X2.8256 Z0 C48.857
X2.8472 Z0 C53.842
__
__
X2.7652 Z0 C98.59
X2.7264 Z0 C103.695
G13.1
X2.7264 Z.1
M9
G0X4. Z.5
M15
M40
M30
%