Tool Diameter Offset

[Exanadu]

Hello, I am relatively new to cnc and am using GRBLControl v 1.2.13b and am cutting out a shape but it is cutting center line therefore milling out some of the shape I want to cut out. My tool diameter is 3.75mm on the GRBLControl software its showing a 1.875mm Offset under the G54 button which I thought would solve the problem but it still cuts center line. I am not sure if I need to do something in the Gcode for it to work or if its supposed to work automatically.

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[ZASto]

G54 is not the tool offset.
I don't think that GRBL supports tool diameter compensation.
Further reading: https://machmotion.com/blog/what-is-...-compensation/

List of Supported G-Codes in Grbl v1.1 Master:
- Non-Modal Commands: G4, G10L2, G10L20, G28, G30, G28.1, G30.1, G53, G92, G92.1
- Motion Modes: G0, G1, G2, G3, G38.2, G38.3, G38.4, G38.5, G80
- Feed Rate Modes: G93, G94
- Unit Modes: G20, G21
- Distance Modes: G90, G91
- Arc IJK Distance Modes: G91.1
- Plane Select Modes: G17, G18, G19
- Tool Length Offset Modes: G43.1, G49
- Cutter Compensation Modes: G40
- Coordinate System Modes: G54, G55, G56, G57, G58, G59
- Control Modes: G61
- Program Flow: M0, M1, M2, M30*
- Coolant Control: M7*, M8, M9
- Spindle Control: M3, M4, M5
- Valid Non-Command Words: F, I, J, K, L, N, P, R, S, T, X, Y, Z

As you can see, no G41/G42 support.

That is something that you must do in your CAM software.

[CNCFr]

Do you know G41 / G42 (cutter compensation at left (G41) or right (G42) side of path?

Edit: I didn't see your post before I did send my question. Funny to have controller which knows G40 but not G41 / G42.