5-axis cutter comp.

[TERRYH]

We use cutter compensation a lot on our 3 axis machines to finish key ways and other slots. when we try and use it in our 5 axis it does not work properly because of how or post transposes  our axis. Is there a way to make it work properly? 

[Guest]

What G-Code are  you using on your 5-Axis comp?

[Guest MTB Technical Services]

We use cutter compensation a lot on our 3 axis machines to finish key ways and other slots. when we try and use it in our 5 axis it does not work properly because of how or post transposes  our axis. Is there a way to make it work properly? 

 

 

If this is a SIEMENS then you need to make some distinctions about how you do it.

 

If this is a table/table machine and you are only looking to use G41/G42 then make sure that CUT2D is active.

If it's a 5-axis type cut then you'll need CuT3DF to be active for G41/G42 to work.

 

If it's a a head/head machine then you'll need CUT2DF for any tilted work plane work for G41/G42 to work correctly.

If it's a 5-axis type cut then, at a minimum, you'll need CuT3DF to be active for G41/G42 to work.

But you may also need CUT3DCC to be active and have specified the ISD value when you apply the D1 comp register.

Depends on the geometry being cut.

 

FANUC is a bit simpler.

You simply call a different G-Code for the cutter comp.

G41.2/G42.2

[TERRYH]

The machine is a Johnsford, and the head spins and tilts to achieve the 5-axis, table only mover in X,Y the head is Z, B and C. not sure of the code used for the post will look, but I do know we use the G41 for our 3-axis machines. 

[jlw™]

That johnford is probably a Fanuc. I've never ran/programmed them but I've seen a few and they all have Fanuc.

[Guest]

The comp on should be G41.2/G42.2.

[jlw™]

G43.4 tcp will need to ba active or you'll get an alarm.

 

At least you do in a Mazak any way.

[TERRYH]

yes all our Johnfords are Fanuc control's

[jlw™]

Are you doing full 5 axis or 5 sided?

[TERRYH]

we do full 5-axis, both live 5 and locked. 

[Guest MTB Technical Services]

we do full 5-axis, both live 5 and locked. 

 

 

If you are using G68.2 for the Tilted Work Plane Function for 3+2 Machining,

then you will use G41/G42 when G68.2 is active.

The reason is that RTCP can't be active for G68.2.

SIEMENS is the same way.

TRAORI can't be active for CYCLE800

 

If your post simply outputs Global XYZ when tilted for 3+2 with RTCP, then use G41.2/G42.2.

 

For 5-Axis simultaneous then it's always RTCP and G41.2/G42.2 .

[TERRYH]

ok thanks for the feedback

[Grievous]

Correction on Tim statement

TRAORI "CAN" be active in a swiveled plane (CYCLE800). You gotta deactivate the system frame for swivel head/table 1st.

[Guest MTB Technical Services]

Per Siemens, it cant.
The manuals clearly state TRAORI must be deactivated before calling CYCLE800.
Per the most current version of the 840D sl.

There is no need for TRAORI within CYCLE800.

However, I've seen people do what you describe on FANUC instead of using a dynamic fixture offset. They'll use the tilted workplane function to handle the roll, pitch and yaw of the position deviation.