Rest Roughing cuts 'like' waterline

[Thee Rickster ™]

Here is an example of a high speed, rest rough path issue that is consistent,

 

The water line rest woks as it is intended, but sometimes I need the rough to avoid

lengthy Cnc times

 

.

.

.

.

.

Its starts with 5 cuts in a corner area properly then starts waterline cutting for the rest of

the path.

 

Does any body no how to tweak this?

 

I can share the file with CNC if they indeed can offer assistance.

 

Much appreciated

Cheers

Rick

[Guest]

containment?

[Thee Rickster ™]

Yes, a rectangle of the core block.

 

(processing with out a containment, as I type.)

[Thee Rickster ™]

same with or without.

[Reko]

I guess maybe I'm not understanding your problem, so discard this if I'm wrong.

 

If what you're trying to do is ONLY rest-rough the corner, shouldn't your containment boundary capture only that corner? I know it's a PITA to draw several containment boundaries but that's what I do and it works for me.

 

HTH, if I'm not misunderstanding what you are asking.

[Thee Rickster ™]

Reko, the entire mold block.

 

The corner that I am showing only has 5 cuts that are right then it

errors, and stop rest cutting then continues to waterline cut

[Reko]

I see. I think I've had the same problem, and my work around is to draw several containment boundaries to control where it rest-roughs and skips all the waterline paths where I don't need them.

[Ocean Lacky™]

Rick,

 

Try leaving EXTRA stock on your Rest Rough.

 

Example: Initial rough leave .010"

Rest Rough leave .011" or more

[David Conigliaro CNC Software Inc.]

How are you defining your rest material? Are you adjusting to ignore small cusps at all? Is the rest rough using the same step down, stock to leave and tolerance as the toolpaths to shape the stock prior to rest rouging used?

[Thee Rickster ™]

David, thanks for the reply.

 

Here is what I do generally do from your Questions.

 

1 - select the geometry

 

 

2. - Use remaining stock as computed

 

2a. - If I tell it to ignore cusps and put say .02(or what ever I have tried all kinds of values)

it has a weird missing cuts syndrome( and still cut 65 % like waterline) so I sont trust it on

a lights out component cut

 

 

3. - not necessarily (except same stock to leave)

I use roughing tool usually - dia. .75 corner rad .375

Tool for path is a .500 ball.

 

3a. When I use all previous tools I get an undesirable(missed cut areas) path also

still with alot of waterline cuts.

 

I now generally will just use the waterline rest path and if I need extra roughing I try to find all of those

areas and use containment bnds and create extra roughing paths.

 

All the above are too time consuming for how quickly I need the software to put out paths

to cut molds without regenning over and over again just to use less efficient alternating pathing.

 

Keep the ideas coming

To Me it is a buggy path, if I pick 'roughing tool" one would think that is the easiest for mastercam

to compute, but it does not appear that simple.

 

Thoughts, concerns, help....go to meeting....??

 

 

Rick

[Ocean Lacky™]

Rest Rough with STL is best option in most cases from my experiences.

[Thee Rickster ™]

I have tried that option awhile back.

I cant seem to get any desirable results, maybe I am doing something wrong??

 

I don't work with stl's and don't really get why it needs all that Just for this path type only?

[Ocean Lacky™]

Verify all roughing ops. DON'T use the Turbo option in verify. Save verify as STL and pick it as rest material.

[Thee Rickster ™]

I can try that again at a later time, but didn,t have great success the first time. (but I probably used turbo)

:bigsigh:

 

BTW Mastercam's verify does not allow turbo in anything but TOP WCS anyhow, so

in this case I cannot use turbo. I bet it will take about 45 minutes to verify this without turbo.

[Ocean Lacky™]

what are your Verify Tolerances set at?

 

Mine are set at Tool: .008 and STL: .001

[Thee Rickster ™]

default.

 

It does not matter what I verify with my molds if I takes 20 mins plus.

Usually hours.

 

But like i said I have only tried the stl method while back when someone had suggested it,

with undesirable results.

 

Why is verify integral to creating a path?

I told it that 3/4 ball was the rougher and I am using 1/2 ball as the next cutter??

Pretty simple math in my books...lol

[Ocean Lacky™]

Not sure of the calculations involved, but using the STL seems to be faster...at least for me.

 

Do you add stock to your tool diameter to account for Stock To Leave?

Example: .750 Ball and .025 Stock to leave would yield a .800 Dia roughing tool in Rest Rough .750+(.025*2)=.800

I find that by doing this you'll be less inclined to be surprised when a small tool goes into a rib or other small area that isn't completely roughed out by the previous tool. (No need to do this when using STL)

[Thee Rickster ™]

Yes I do exactly that, but because I am forced to use waterline rest, because it works as it should without the .stl, I don't have an issue

with that scenario or type of gouge. (getting good at seeing the areas to manually rough with containments)

 

I have exhausted my time with this mold to retry the .stl method.

 

i will get back to you if and when I get anything to work.

 

If the rest rough did not waterline, also, there would be no issues.

 

Thanks

Rick

[David Conigliaro CNC Software Inc.]

I am interested in this file, can you email it to me, I'd like to try something in X6.

[Thee Rickster ™]

David, the file is 186 meg.

 

I can break it down to the cavity and leave you the cutterpath in Question and a few others

before and after.

 

Give me about and hour and I will zip it up and send it to you.

 

Thanks

Rick

[David Conigliaro CNC Software Inc.]

Very well, thank you.

[David Conigliaro CNC Software Inc.]

Another trick to reduce file size is to do something like move your entire part and then undo to put it back so all your ops are marked dirty. This will greatly reduce the file size.

[Reko]

I've been able to remove most of the waterline cuts in my latest program by checking, "Adjust Remaining Stock to Remove Small Cusps" and setting the Adjustment distance to .030" like someone suggested earlier in this post. It didn't stop all of the unnecessary cuts though.

 

Please post any results of the changes that get made. I am very interested in this subject.

[Thee Rickster ™]

Dave, p.m. me your email addy so I can attach a file.......

[Thee Rickster ™]

I have been informed that the Rest Rough path behaves exactly how MC has intended it to.

I will not pursue the issue any further.

 

.

.

.

.

.

 

 

This pic is what I want it to do.

The results I get are nothing like it.

 

Thanks for the help.

 

Rick