Meshmill

STL model:

triangles

This is a lot of triangles! This could make the "Process surface" operation very slow, but won't have an effect after that.

XY origin:
Z origin:

Bounds:

The physical size represented by each pixel of the heightmap. XY Resolution:
Heightmap:	px Large heightmaps increase processing time for all operations. Try increasing the "XY Resolution" value to reduce the size of the heightmap. Tip: start with a low-quality heightmap while setting up your jobs, and switch to a finer resolution at the end to export your G-code.
Bottom side

Tool shape:
Tool diameter:
XY feed rate:
Z feed rate:
Height to move above the part for rapid moves. This is relative to the top surface of the bounding box. Rapid Z clearance:	Negative rapid Z clearance can cause rapid movements to crash into the part.
Spindle:	rpm

Cut direction:
Perpendicular distance between consecutive passes. Step over:	Step over should be smaller than tool diameter.
Maximum deviation of a flat surface, if cut by a ball-nose end mill with the given diameter and given step over. Nominal deviation:
Distance between consecutive sample points of the heightmap. If this value is too large then it can cut straight through small protrusions, and it can skip over small dips. There is no benefit from setting this value smaller than the "XY resolution" of the surface heightmap. Step forward:	A step forward value smaller than "XY Resolution" results in increased processing time with no quality advantage. If you want finer steps forward you'll need a finer heightmap resolution.
Maximum depth of cut for a single pass. Where the required depth exceeds this amount, it will be achieved with multiple passes. Step down:
Distance to keep tool away from finished model geometry. This leaves material for a finishing pass to clean up. Stock to leave:	Negative stock to leave will make the part smaller than the model. This is untested and usually not what you want.

Only generate roughing passes. Don't generate the finishing pass. If you only want the finishing pass, set the step down larger than the height of the model. Roughing only
Reduce plunge forces by ramping the cutter diagonally where possible. Ramp entry
Don't cut the top surface of the part. This saves wasting time on slowly moving the cutter back and forth across flat top surfaces. Omit top
Allow cutting below the bottom of the bounding box. This allows you to cut straight sides with a ball-nose end mill without leaving a radius at the bottom. Cut below bottom
Allow cutting beyond the edges of the bounding box. This allows you to cut the outside edges of the model. Cut beyond edges

Cycle time estimate: ?

Show toolpath