Interpreting the feed rate as mm/rev with M136

Application

Description of function

Effect

M136 takes effect at the start of the block.

In order to reset M136, program M137.

Application example

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.

11 LBL "TURN"

12 FUNCTION MODE TURN

; Activate turning mode

13 M136

; Switch interpretation of the feed rate to mm/rev

14 LBL 0

M136 is here located in a subprogram in which the control activates the turning mode (option 50).

With M136 the control interprets the feed rate as millimeters per spindle revolution, which is necessary for the turning mode. The feed rate per revolution refers to the rotational speed of the workpiece spindle. The control thus moves the tool at the programmed feed rate for every rotation of the workpiece spindle.

Without M136 the control interprets the feed rate as millimeters per minute.

Notes

  • In NC programs based on inch units, M136 is not allowed in combination with FU or FZ.
  • The workpiece spindle is not permitted to be controlled when M136 is active.
  • M136 is not possible in combination with an oriented spindle stop. The control cannot calculate the feed rate because the spindle does not rotate during an oriented spindle stop, such as when tapping.