View source for Tool Length/Offsets G43Hn G49

Tool Table Length and XY Offsets are applied with GCode Commands '''G43 Hn''' where n is the Slot or ID of the Tool Length/Offset to be applied.

'''G49''' will turn off any Tool Length/Offset compensation.


Note a common mistake is to assume that changing Tools with an '''M6 Tn '''will automatically apply the Length/Offsets for then newly loaded Tool.  GCode was designed in this manner to allow the operator full control of if/when the compensation for any Tool is actually placed into effect or removed. 


A related issue and common source of confusion is with regard to '''Zeroing''' or '''Setting''' the DRO's.  When Zeroing or Setting the DRO's the result is that a GCode Offset is modified to achieve the desired result.  Its important to realize that the computed offsets will be dependent on whether Tool Length/Offset Compensation is currently in effect or not and for which Tool.  Depending on your work process you may or may not want Length/Offset Compensation Enabled when Zeroing or Setting a DRO.


KMotionCNC has a Tool Setup Option to automatically perform a G43 Hn whenever a Tool is changed Manually with the on-screen Drop Down Selection.  See [http://dynomotion.com/Help/KMotionCNC/ToolSetupScreenTP.htm#Tool_Length/Offset_Immediately here] for more info.