> For the complete documentation index, see [llms.txt](https://tworks-wiki.gitbook.io/cnc-3-axis-turn-mill/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tworks-wiki.gitbook.io/cnc-3-axis-turn-mill/getting-started-and-get-cutting/set-maximum-depth-and-surface.md).
# Set maximum depth and surface
1 . Press **Jog Arrows** to position the tool over the spoilboard. Place the grounding craedl on the ATC mounting groove ion the spindle tool holder.
2 . Press **Set Max Depth** to set the maximum depth for the bit.
3 . Place the surface block underneath the tool adn top of the tabletop or at the required maximujm depth.
4 . Press **Z-axis Jog Arrows**to lower the spindle until the end of the tool is just above the surface block.
5 . Press and hold **Zero** to begin the Maximum Depth routine. This wil cause the Z-axis to move down slowly until the tool comes in comtact with the surface block and then move up above the surface block to the Tool Lift Height
6 . Remove the grounding collar adn surface block before beginning work
### Setting up surface
1 . Press J**og arrows** to position the toolbiut anywhere over the matrerial to be cut.Place teh grounding collar on the ATC mounting groove in the spindle tool holder
2 . Press **set surface** and enter the tool number.
3 . Place the surface block on top of the material underneath the tool.
4 . Press **Z-axis Jog arrows** to lower the Z-axis until the end of the tool is just above the surface block.
5 . Press and hold **Zero** to begin the surfacing routine.This will cause the Z-axis to move down slowly until the tool comes in contact with the surface block and then moveup above the surface block to the tool lift height.
6 . Remove the guarding collar and surface block before beginning work.
The Thickness of the material will be displayed on the screen ater calibrating the surface
