CamBam / FreeCAD 2D/3D MOP question Please help

[phill05]

I wanted to mill a simple semi circle slot along the horizontal plain of the material. The circular slot is to be 120mm long / 11.113mm deep


This picture is just an example I made so you can see what I am trying to do. I have milled the object all apart from the slot on the left.
What is the simplest way to do this ?.

I would draw the slot as a line longer than you need draw a semi-circle to the size you want and extrude the semi C along the line, create your tool path using a bull-nosed cutter, using center line of where you want to put slot across the part, use this as XYZ = 0 set your cutter & g-code to run from there, it should cut a semi-circle across the part.

Phill

[dudz]

I would draw the slot as a line longer than you need draw a semi-circle to the size you want and extrude the semi C along the line

Phill

This is the bit, Im not sure how to do ?

[phill05]

Take a look below.


first draw a line longer than you need so you have overcut of the part, then draw a semi circle like the one in red in your software look for extrude, pick the line as your length of cut, then pick the semi C as your profile and merge them together, you need to orientate your part or the drawing to cross your part using the top face of the part as the XYZ =0 you end up with a semi circle cut into the part as shown.
Hope it helps, if not give me the exact sizes of the part you want to cross and the size of the semi circle and I will do you a code to cut.

Phill

[dudz]

ah that's probably why. I don't have "extrude" in my CAD software. What software are you running for example ?
looks like vectric

[phill05]

Take a look at the 4th paragraph down Extrude.

http://www.cambam.info/doc/plus/cad/DrawSurface.htm

Phill

[dudz]

pick the line as your length of cut, then pick the semi C as your profile and merge them together
http://www.cambam.info/doc/plus/cad/DrawSurface.htm

Phill

Ok found the Extrude in Cambam. I managed to make a 3D circle , but I am now stuck on how the merge them together. and I cant get the circle/cylinder to follow the same axis as the line.

Sorry for my lack of understanding here !

[phill05]

disregard my first idea as this was done in Vetric, in Cambam first create the semi circle then extrude upwards to the over length you require then follow the instruction to rotate the part.

(To create extrusions along other axis, the shape must first be extruded in Z, then rotate the extruded surface object to the required orientation.
The Extrude operation will first prompt for an Extrusion Height. This will be the Z height of the extruded surface. A positive height will extend toward the positive Z axis (ie toward the viewer when drawing is in the normal orientation with the XY plane parallel to the screen). A negative height will extend the surface along the negative Z axis (ie into the screen).