How to cut part of model with PrusaSlicer?
This is broken train track
my son in law asked me to print only the left arm for repair from this model
https://www.printables.com/model/345680-train-tracks-complete-set-v4-reversible-compatible
for day-care center of 2yo grandson.
I tried to use cutting tool, but was not able to get what I wanted:
I did know how to cut planar with sunken model after some rotations ...
... and the result is OK:
But I want to learn how to cut only that part from original model without rotation.
Is that possible?
If so, how?
This is not a job for the slicer.
It's clear from the picture that the break is not straight. If you are going for a straight cut you will have to machine the face of the broken part flat to match.
If not, you will need a scan; in this case a simple 2D scan or manipulated photo' might be enough (it needs to be a silhouette and to exact scale.)
In CAD, take the scan and elevate it to a block thicker than the object. Load the part as linked and subtract your scan-block from it leaving only the missing part - export and print.
It won't be perfect but it will be close. For more accuracy you will need a 3D scan.
Cheerio,
RE: How to cut part of model with PrusaSlicer?
To answer your original question, yes it is possible to cut at any angle. This is basic and covered in the appropriate knowledge base article https://help.prusa3d.com/article/cut-tool_1779
You can rotate the cut plane to any angle you like rather than rotating the object. Same way you can reposition the cut plane. The coloured handles that appear have different effects. SO you dont use the panel you grab the handles. For example this image from the cut KB 
If you grab the green handles you can tilt it in that axis. If you grab the red handles it tilts in that axis. Grab the grey centre sphere and you can move the plane up and down.
Spend a little time experimenting with the tools and you will gain a lot more proficiency.
RE: How to cut part of model with PrusaSlicer?
This is not a job for the slicer.
Since I only have the .stl file only PrusaSlicer is available.
It's clear from the picture that the break is not straight. If you are going for a straight cut you will have to machine the face of the broken part flat to match.
My son in law said that he will do that to get a flat match.
RE: How to cut part of model with PrusaSlicer?
To answer your original question, yes it is possible to cut at any angle. This is basic and covered in the appropriate knowledge base article https://help.prusa3d.com/article/cut-tool_1779
You can rotate the cut plane to any angle you like rather than rotating the object. Same way you can reposition the cut plane. The coloured handles that appear have different effects. SO you dont use the panel you grab the handles. For example this image from the cut KB
...
If you grab the green handles you can tilt it in that axis. If you grab the red handles it tilts in that axis. Grab the grey centre sphere and you can move the plane up and down.Spend a little time experimenting with the tools and you will gain a lot more proficiency.
Thank you, my problem before was that I did not use "planar" but "dovetail".
With planar it was so simple!
Since I only have the .stl file only PrusaSlicer is available.
Many (most?) CAD applications will let you import an .STL which you can treat as a primitive. It's worth experimenting.
Cheerio,