Reducing the feed rate for infeed movements with M103
Application
With M103 the control performs infeed movements at a lower feed rate, for example when plunging. You use a percent factor to define the feed-rate value.
Description of function
Effect
M103 is in effect for straight lines in the tool axis at the start of the block.
In order to reset M103, program M103 without a defined factor.
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.
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 L X+20 Y+20 F1000 | ; Move in the working plane |
12 L Z-2.5 M103 F20 | ; Activate feed rate reduction and move at reduced feed rate |
13 L X+30 Z-5 | ; Move at reduced feed rate |
In the first NC block the control positions the tool in the working plane.
In NC block 12 the control activates M103 with the percent factor 20 and then performs the infeed movement in the Z axis at a reduced feed rate of 200 mm/min.
Next, in NC block 13, the control performs an infeed movement in the X and Z axes at a reduced feed rate of 825 mm/min. This higher feed rate results from the control moving the tool in the plane in addition to the infeed movement. The control calculates a cutting value between the feed rate in the plane and the infeed rate.
Without M103 the infeed movement is performed at the programmed feed rate.
Input
If you define M103, the control continues the dialog and prompts you for the factor F.
Notes
- The infeed rate FZ is calculated from the last programmed feed rate FProg and the percent factor F.
- M103 is also in effect with an active tilted working plane coordinate system WPL-CS. The feed rate reduction is then active during infeed movements in the virtual tool axis VT.