Departure functions DEP LCT and DEP PLCT

Application

The control uses these functions to depart a contour on a circular path with tangential connection and a straight line. You use DEP LCT to define the end point with Cartesian coordinates, and DEP PLCT for polar coordinates.

Description of function

8H000_45
  • The control departs the contour as follows:
  • On a circular path from the last contour point PE to the auxiliary point PH
  • On a straight line from the auxiliary point PH to the end point PN
  • If you program the Z coordinate in the departure block, the control simultaneously moves the tool from the auxiliary point PH to the end point PN.

    The circular path is connected tangentially both to the last contour element as well as to the line PH to PN. Once this information is entered, the radius R suffices to unambiguously define the tool path.

Programming DEP LCT and DEP PLCT

 
Tip

If you want to program this path shape with polar coordinates, then you must first define a pole CC.

Polar coordinate datum at pole CC

  1. To define the departure function:
  2. Program the last contour element with the end point PE and radius compensation
ApprDep

  1. Select APPR DEP
  2. The control opens the Insert NC function window.
ProgramDepLctIcon

  1. Select the path shape, for example DEP LN
  2. Define the coordinates of the end point PN
  3. Define a positive value for the radius R of the circular path

Example DEP LCT

11 L Y+20 RR F100

; Last contour element PE with radius compensation RR

12 DEP LCT X+10 Y+12 R+8 F100

; Coordinates PN, radius of the circular path: R 8

13 L Z+100 FMAX M2

; Retract in Z, return jump, end program