Boolean difference 1-20  21-37

 From: gunter511 3 Jan 2017  (1 of 37)
 Hi, I'm trying what I thought would be a simple boolean difference but for some reason, it just doesn't happen. If I draw a straight perpendicular line, it works but not with the one at an angle. Could someone help please? Thanks! Gunter Attachments:

 From: Frenchy Pilou (PILOU) 3 Jan 2017  (2 of 37)
 Better to separate line from the volume! Something like this (after the boolean Diff one part was moved) And for have no any problem better to take a plan as Boolean Diff so extrude your line! PS Also better if you post your file 3dm ! (an image is not sufficient for avoid misundestanting! :) And that avoid to sculpt something by the helper! :) EDITED: 3 Jan 2017 by PILOU

 From: gunter511 3 Jan 2017  (3 of 37)
 8249.3 In reply to 8249.2 Thanks Pilou, I've attached the file. I'm trying to create a recess in the object where I have drawn the line. Thank you! Gunter Attachments:

 From: futagoza (STEFAN) 3 Jan 2017  (5 of 37)
 My little test, Construction, Curve, ISO =V Circle Profile sweeped around ISO Curve and then a boolean operation. Regards Stefan some 3D doodles Attachments:

 From: gunter511 3 Jan 2017  (6 of 37)
 8249.6 In reply to 8249.5 Stefan, What you've done is exactly what I want to do but being the relative newbie that I am, I don't understand your instructions! Could you please explain? Many thanks! Gunter

 From: Finema 3 Jan 2017  (7 of 37)
 8249.7 In reply to 8249.3 Hi Extend your line and apply the boolean Image Attachments:

 From: gunter511 3 Jan 2017  (8 of 37)
 8249.8 In reply to 8249.7 Finema, Thank you for your reply. It works if the line is perpendicular as under but if it's slanting it donesn't seem to work. I must be doing something wrong. Thanks! Gunter Attachments:

 From: futagoza (STEFAN) 3 Jan 2017  (9 of 37)
 Hi Gunter, you need to go under the "Construct" Menu to the "Curve" Icon and then select the "ISO" Icon with "V" settings only and select in the right view your object and move the yellow ISO curve until it matches (snaps) the position of your outer curve. After that is done your create a small circle (as profile) for the "Sweep" Command were you use the ISO Curve as rail and then do a boolean subtract, to obtain the engraving. Hope my explanation is clear enough. Regards Stefan

 From: Finema 3 Jan 2017  (10 of 37)

 From: gunter511 3 Jan 2017  (11 of 37)
 8249.11 In reply to 8249.9 Stefan, Thank you that worked perfectly. Thank you for your help! Gunter

 From: Finema 3 Jan 2017  (12 of 37)
 8249.12 In reply to 8249.11 In fact i haven't understand what you want to do :) can we show us the result ? thanks

 From: Frenchy Pilou (PILOU) 3 Jan 2017  (13 of 37)
 Another time a prove that send the 3dm file is crucial! :)

 From: futagoza (STEFAN) 3 Jan 2017  (14 of 37)
 You're welcome Gunter, glad it worked that way! Regards Stefan some 3D doodles

 From: Michael Gibson 3 Jan 2017  (15 of 37)
 8249.15 In reply to 8249.1 Hi Gunter, so the problem there is that a line that is angled diagonally in 3D space does not have a well defined single extrusion direction. The boolean will want to extrude the line into a plane and then use the plane to cut the object, but it needs to know what direction it should extrude it. When your line is on one of the world axis planes it will use that axis direction, that's why those other lines worked. For your situation with a line at an angle not in a world plane like that, you will need to extrude the line into a plane yourself and then use the plane as the cutting object in the boolean. There is a "Set dir" option in the Extrude command that can be used for extruding in a specific direction. Another way that might work more easily for making an angled cutting plane is drawing it using the Draw solid > Plane > 3 pts command. - Michael

 From: gunter511 4 Jan 2017  (16 of 37)
 8249.16 In reply to 8249.15 Hi Michael, Thanks for clarifying. Making a plane worked well. I'm now trying to make two recesses and have tried scaling and sweeping (Stefan's suggestion) but they don't seem to turn out right. I'm looking to create recesses only on the left and right faces, not the bottom of the object. Thanks in advance! Gunter

 From: Frenchy Pilou (PILOU) 4 Jan 2017  (17 of 37)
 8249.17 In reply to 8249.16 You can make also a simple Sweep 2 Rails! ;) EDITED: 4 Jan 2017 by PILOU