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View Full Version : Need Help! Making a pocketing mop



FoxCNC1
03-19-2014, 07:08 PM
I downloaded the demo of RhinoCAM as I am trying to decide if its the program I want invest in. I have been using a friend's aspire and have gotten very good with it, but I feel that is it a bit limited when it comes to 3D from what I have seem. - anyway, that is another topic.

I have designed a part in autodesk inventor and brought it into Rhino to compare workflows.

I want to be able to pocket the recess below and then make some holes, and cut the center. I am using a pocketing MOP as seem below and I am using the 3D model for depths and define the surface to machine.

http://i10.photobucket.com/albums/a146/Profoxcg/3_zps5b62a600.jpg (http://s10.photobucket.com/user/Profoxcg/media/3_zps5b62a600.jpg.html)

Here is the toolpath - not much to see, I was expecting to see lines all over the model

http://i10.photobucket.com/albums/a146/Profoxcg/2_zps4d00399c.jpg (http://s10.photobucket.com/user/Profoxcg/media/2_zps4d00399c.jpg.html)

and here is the result. The mop goes around the holes, whereas I would like it to plane the surface and then I can set the drilling operation.

http://i10.photobucket.com/albums/a146/Profoxcg/1_zps8498e7ed.jpg (http://s10.photobucket.com/user/Profoxcg/media/1_zps8498e7ed.jpg.html)

I have watched some videos but I cant seem to find the solution to this. Can someone please assist me? I know RhinoCam can be very powerful.

FoxCNC1
03-20-2014, 12:33 AM
Hey guys, I was pointed to the mechsoft site and came across this video.
Created by MecSoft Corporation www.mecsoft.com (http://www.mecsoft.com/Training/videos/RC2.0/Tutorial2_ShaftBase_1/Tutorial2_ShaftBase_1.html)

very similar to what I want to do. I noticed the for every operation the presenter is extracting curves for the boundaries. Is that really the workflow?
I was under the impression that one could simply pick the model surfaces.

swarfman
03-28-2014, 09:25 AM
You define machinable regions by either drawing curves or you can select the curves from the object in some instances. There are commands to assist with this - too many to get into here.

In the example you have defined your machining region as the inner and outer edges of the recessed area. You also drew individual regions around the holes. RhinoCam will see this as "machine the area between the inner and outer edges and exclude the holes". It appears the diameter of the tool is too large to fit between the edge of the hole and the outer edge of the recessed area. If the tool diameter is larger than the hole(s), simply hide or remove the curves (defined cutting region) around the holes and the tool will cut the surface ignoring them. If your tool was smaller than or equal to the hole diameter and you didn't exclude the holes it would attempt to cut them.

Make sure you have clicked on the "show tool paths" icon in the lower portion of the MOps window to see them.

FoxCNC1
03-28-2014, 09:53 AM
thank you for reply.
The model is actually imported from inventor, so there are no curves only solid geometry or surfaces.
What I selected was the face I wanted to machine and the software picked up all those edges.

I think that I should have done it extract curves and then do what I was doing. I was used to just picking the 3d model from playing with another CAM program. Thankfully I am going to see a live demo of Rhinocam today !! then I will make a decision on what to buy (and go broke on)

FoxCNC1
03-29-2014, 04:29 PM
Good demo by the guys at mechsoft. They took my part an showed me how it should be programmed, may be buying, but still want to play with the demo a little longer.

awerby
03-29-2014, 05:11 PM
Great; the Mecsoft tech support team is really good at what they do. To recap for people who didn't get the demo, what you needed to do was first to select the circle on the outside of your pocket, and use that for a "machining region", telling the program how deep you wanted the pocket to be. That should get you a clean circular pocket, without those areas around the holes sticking up. Then, to do the holes, you'd pick either the circles around the edges or a point in the middle of them as the machining regions, and set up a drilling operation.

By the way, let me know if you'd like a discount on RhinoCAM; we're authorized Mecsoft distributors.

Andrew Werby
computersculpture"dot"com