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 only be executed 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

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