Surfacing a pocket

[connormac]

I'm doing a part that looks like a small bread loaf pan with 2 holes in the bottom. It goes from a .38" radius in the corners at the too to a .13" radius at the bottom in the corners. Plus .13" radius all around the bottom. With 13 degree draft. I filled the holes with surfaces.

 

I did a surface rough pocket tool path to rough it out. But now can't figure out how to finish it. The rough pocket has 19 drive surfaces. I tried surface flowline and surface finish contour. flowline didn't like all the surfaces and finish contour tried to cut inside and outside?

[Guest]

Finish parallel Steep, A flowline on the radii and either a scallop of Horizontal finish on the floor

 

Are where I would try to start.

 

Just guessing based on your description

[Kannon]

not using X but can you create a boundry so it keeps the toolpath to the inside?

[mayday]

ball nose or bull nose?

make it a solid if its surfaces now

use highspeed waterline

and horazontal if the bottom is flat

[MLS]

+1 Kannon.

 

Add a boundary on the outside profile of the part so it will only cut the inside.

[JDowe]

Probably can fix both sides by going into "advanced settings" and setting "roll only

between surfaces"

[connormac]

MayDay It was a solid to begin with. I put it on the ftp site in the MCX2 files. Named Bread pan.mcx if anyone wants to look. Ball nose. I will try waterline.

 

John,I'm trying the parallel steep. Can you change direction from up and down to back and forth.

 

Kannon will try to create a boundry after I try waterline.

 

Yes I'm lost.

 

Thanks everyone for the help!!!

[JDowe]

Tried a surface finish scallop toolpath on the partwith a bullnose end mill and it looks pretty good- made the top flat surface a check surface

assumed you wnated to cut the bottom too - if not

set depth limit

[connormac]

JDowe I had to use a 1/4 ballnose to get into the bottom corner but thanks for looking I will try scallop.

 

Kannon I set the boundary at the top of the radius where it breaks over. It's working better. Will try more the 26th.

 

Thanks all for the help.

 

Have a nice Christmas!!

[cajahawa]

While we're on the subject, how can a person cut just the outside of a part using an inner and outer bounding curve? Every time I try it I get a warning using surface contour. X2 MR2. Thanks, Wayne

[MLS]

I believe it will only accept one boundary Wayne. If I understand you correctly, What you might try is taking the inner boundary and creating a flat boundary surface with it then using it as a drive surface in addition to the rest of your surfaces.

[Thee Rickster ™]

connormac

 

I made a path you will like hopefully with the 1/4

ball. Its in the MCX2 files called BREAD PAN MAN.mcx

 

I did not finish the bottom with the ball because

you had already did a pocket after roughing with

the 1/2" end mill

[Thee Rickster ™]

Wayne

 

I have done similar paths like you describe

using boundaries

Do you have a file to share?

 

Rick

[cajahawa]

MLS, What I'm doing is either checking to all the internal surfaces or capping it like you said. Rick, sorry I can't send you a file. I don't have internet access. Though I've grumbled enough that I should be getting it soon. What I'm trying to do is draw 2 circles and cut in the middle of them. The warning I get is something to the affect the the boundaries can't overlap or be nested, and to do an analyze on the curves. It's not the end of the world but it would be kind of convenient to just grab the curves and go. Thanks Wayne

[crazy^millman]

Well you can not have one boundary inside of the other for that toolpath. Use the inner circle and then make a surface using the other cicle using the create/surface/draft then use it as a check surface instead of the chain will work like a champ for you then.

 

HTH

[Thee Rickster ™]

Wayne, I get the same error when using surface

contour,

 

I never had the error before because High speed

waterline is my path of choice(essentially the

same as contour)

 

You can probably use the outer boundary for the

path then trim the path using the inner boundary.

 

here is the high speed scallop

.

.

.

.

here is the waterline

.

.

.

 

.

I use the high speed paths 1st before I go to

the older style

 

HTH

[Thee Rickster ™]

Here is the surface finish contour trimmed

 

It gouged and I could not get it not to gouge.

 

Therefore the high speed waterline is the way to go

for some reason the surf fin contour does not

like the 2 bnds??

.

.

[cajahawa]

Thanks guys, I think I'll give the waterline cut a try. I just started messing with the high speed toolpaths anyway. I've been using the flat surface cut and have been real impressed. Thanks, Wayne

[Guest]

connormac,

 

I placed one up on the FTP as well, Bread Pan JMP.mcx,

 

The finish parallel steep was going to be the best way to do that.

[cadcam]

Ok I have put on the FTP the file bread pan-cadcam.mcx

 

I took your rough pocket and d2 pocket and used them for the start but removed the .5 ball and changed to the .5 straight 1/2 EM.

And to finish the walls to the floor used Surface blend to collapse from the top down to the 2d pocket.

[connormac]

I forgot to thank all of you for the help with the bread pan.

John,I was able to look at how you programed the surfaces using waterline and flow line. I used what you did, plus did the same thing on the other side and complete the parts.

Cadcam, I'm still trying to do it the way you are talking about.

I'm trying to learn as many different ways to do it for the next time.

!!!Plus my boss was really able to see the advantage emastercam.com. I was able to ask for help and all of you responded with help and hints !!!

Again thank all of you for the help.