Cycle 270 CONTOUR TRAIN DATA

ISO programming

G270

Application

You can use this cycle to specify various properties of Cycle 25 CONTOUR TRAIN.

Notes

  • This cycle can be executed only in the FUNCTION MODE MILL machining mode.
  • Cycle 270 is DEF-active, which means that it takes effect as soon as it is defined in the NC program.
  • If Cycle 270 is used, do not define any radius compensation in the contour subprogram.
  • Define Cycle 270 before Cycle 25.

Cycle parameters

Help graphic

Parameter

Q390 Type of approach/departure?

Definition of type of approach/departure:

1: Approach the contour tangentially on a circular arc

2: Approach the contour tangentially on a straight line

3: Approach the contour at a right angle

0 and 4: No approach or departure movement is performed.

Input: 1, 2, 3

Q391 Radius comp. (0=R0/1=RL/2=RR)?

Definition of radius compensation:

0: Machine the defined contour without radius compensation

1: Machine the defined contour with compensation to the left

2: Machine the defined contour with compensation to the right

Input: 0, 1, 2

Q392 App. radius/dep. radius?

Only in effect if a tangential approach on a circular path was selected (Q390 = 1). Radius of the approach/departure arc

Input: 0...99999.9999

Q393 Center angle?

Only in effect if a tangential approach on a circular path was selected (Q390 = 1). Angular length of the approach arc

Input: 0...99999.9999

Q394 Distance from aux. point?

Only in effect if a tangential approach on a straight line or a right-angle approach is selected (Q390 = 2 or Q390 = 3). Distance to the auxiliary point from which the tool will approach the contour.

Input: 0...99999.9999

NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.

Change the following contents as needed:

  • Tools
  • Cutting parameters
  • Feed rates
  • Clearance height or safe position
  • Machine-specific positions (e.g., with M91)
  • Paths of program calls

Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.

In addition, test the NC programs using the simulation before the actual program run.

 
Tip

With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.

Example

11 CYCL DEF 270 CONTOUR TRAIN DATA ~

Q390=+1

;TYPE OF APPROACH ~

Q391=+1

;RADIUS COMPENSATION ~

Q392=+5

;RADIUS ~

Q393=+90

;CENTER ANGLE ~

Q394=+0

;DISTANCE