CNC tool length measurement on Z-Axis

Comments

• Repetier

  March 2019

  See G30 description in Repetier.ino file. You can use it to level Z and setting offsets. That was added to allow CNC tools to level to object height or wherever they have their sensor. So it sets the physical z=0 and adjust z to what you need at once.
• Maashkinoozhe

  March 2019

  Thanks that was the hint I needed. It took me a while to figure it out.
  This is how I solved my Problem.
  
  Feature Configuration:
  
  #define FEATURE_Z_PROBE 1 //this feature needs to be enabled to use commands G30
  #define Z_PROBE_HEIGHT 26   //because my switch has a height of 26mm when its triggered
  
  Also the defines
  Z_PROBE_PIN
  Z_PROBE_PULLUP
  Z_PROBE_ON_HIGH
  should be configured.
  
  This is my Setup:
           __
           | |
           | |                         <- end mill
           | |
           \/
           __
           |S|                        <- The S is my Z_Probe (switch for messuring my tool hight)
       +-------+
        |         |                    <- this is the workpiece i want to mill down
  ###############  <- This is by Bed, lowes Point my tool can reach.
  
  
  The workpiece is placed on the bed and the switch is placed on the workpiece.
  The end mill is then probed onto the switch with the following command.
  
  G30 H<workpiece height> R0
  
  Result if my Workpiece has a height of 10mm
  
           __
           | |
           | |
           | |
           \/
           __                        <- This is :   Machine(36) = Display Position(26) = Machine(36) + Offset(-10)
           |S|
       +-------+                  <- This is:    Machine(10) = Display Position(0) = Machine(10) + Offset (-10)
        |         |
  ##############   <- This is:     Machine(0) = Display Position(-10) = Machine(0)+ Offset(-10)