Stl part

You can get this dialog box pressing the 'Cut as Tapered Slices' link located in the 'Cut Sliced Stl Part'

You can use this if you just own a Cnc machine with 2 or 4 linear axes. If you press 'Cut as Tapered Slices' button the following dialog will appear:

Using tapered parts will create a better result and less sanding will be required. But you need here 4 linear independent axes and the cutting process can be longer and more complex.

Now we will explain in deep every single part of the dialog.

Left side: the parameters and commands

You can see listed here all the Sliced part defined in the previous dialog.
For each item you can see the dz value (the thickness of the foam panel you'll use then), the z height where the Slice is placed and the optional Offset.
You can also switch off parts Unchecking them.
When you go then to export/cut them, you can also select all the Slices with the same thickness of the selected one just by pressing the 'Check all Parts with the same dz of the selected one' button.

Section interpolation type: every slice can be internally computed splitting in in sub-slices, and using then the Union of all the XY sections as shape of the final Sliced part.
You can select among None/Light/Medium/Best where None doesn't apply subinterpolation and Best uses the more accurate interpolation.
This parameter can help you when some slice have internal sections larger than the upper/lower section, to avoid to cut a too little sliced part.

Global Added Offset to Contours: (*) value: you can apply here a Global (valid for all Sliced parts) offest value. This offset value will increase the size of the Sliced parts, to have more material for the sanding job.

Apply Added Offset to selected Part -> value: this is similar to the above option, but this value can be customized for each single Sliced part.

Synchropoints type (*): Sinchropoints are referrence points used to create the tapered part. The hotwire will then reach every synchropoints couple at the same time. These the type of precomputed synchropoints you can apply:

None: in this case no synchropints will be generated.
Smart: the application will evaluate for a good enough type
Match sharp points (geometric): use this setup if you want to use Sharp corners as synchropoints. This is usyually good for geomertic type STL
Match faces (artistic): use this setup for artistisc type stl, like sculpted objects, for example
After selecting a different type Press the 'Reset All Parts' button to apply them.
You can then modify/refine the Synchropoints using the 'Edit Synchropoints of the selected Part' button

Limit tapering cutting angle to (*): angle value: Cnc hotwire machines don't like a very big angle on the hotwire (big difference on left/right carriages paths). Using this parameter you can automatically limit the max angle, by increasing the smallest up/down section

Force selected Slice to Untapered: some Sliced section can be problematic cause too different up/down sections. In this case you can force that section to be created as a untapered part.

Edit Contours of the selected Part: using this button you can go to graphically modify the contours of the selected Sliced part

Edit Synchropoints of the selected Part: the Tapered Part management dialog will start. You can here modify the Synchropoints

Reset All Parts: pressing this button all the tapered parts will be recreated using the selected above parameters marked with (*)

Cut Checked Parts: the Cutting Tapered Parts wizard will start, where you can cut the Checked Tapered Parts.

Save Checked as Tapered Parts: you will be prompted for a Folder and a Prefix Name for the Tapered files that will be then created

Save Checked to .DC1: you will be prompted for a .DC1 file name where the selceted section contours will be included

In the 2D preview you will see the geometry of the actual Tapered part as an upper and lower XY sections.
You can navigate the sections by selecting a different item in the Sliced parts list, or just moving the vertical cursor placed at the left side of the 2D preview.
You can select to Show the added lines and elements using the Check boxes placed below the 2D preview

Pressing the 'Fit to screen' button you will maximize the drawing to the 2D preview window size.

You can see here the 3D Preview of the Stl part (optional) and all the checked Sliced parts
The actual Sliced part will be rendered as Red.
If you have the STL part enabled and you see some part of it out of the Sliced part, you can increase the Added Offset value .