Circular path CTP

Application

You use the CTP function to program a circular path with polar coordinates that connects tangentially to the previously programmed contour element.

Requirements

  • Pole CC
  • You must define a pole CC before programming with polar coordinates.

    Polar coordinate datum at pole CC

  • Previous contour element programmed
  • Before you can program a circular path with CTP you must program a contour element to which the circular path can connect tangentially. This requires at least two positioning blocks.

Description of function

8H000_55

The control moves the tool on a circular path, with a tangential connection, from the current position to the end point defined with polar coordinates. The starting point is the end point of the preceding NC block.

When contour elements uniformly merge into another, without kinks or corners, then this transition is referred to as tangential.

Programming a circular path CTP

  1. To program a circular path with CTP:
Ct

  1. Select CT
P

  1. Select P
  2. Define the polar coordinate radius PR
  3. Define the polar coordinate angle PA
  4. Define the feed rate, if necessary
  5. Define a miscellaneous function, if necessary

Notes

Example

12 L X+0 Y+35 RL F250 M3

13 CC X+40 Y+35

14 LP PR+25 PA+120

15 CTP PR+30 PA+30

16 L Y+0