Optirough problem - Potential catastrophe.

[neurosis]

This is a strange issue that I haven't seen before.  This part file is updated from X6 - X8. The X6 tool path was fine. I pulled this in to X8 and got a big surprise.  I also ran this through X7 just so check it out and it had the same issue.

 

The issue starts at about 45 seconds in to the video on about the 5th depth of cut. 

 

First the tool pogo's in one of the corner and re-cuts the same spot several times. Then after continuing to the right side of the part, decides to stop with that depth of cut and go directly to the next causing a 2X deeper cut than programmed for.

 

The settings are

 

60% step over - 1.2

10.1% depth    - .202  (I divided up the over all depth in to equal steps so there wasnt a tiny pass left for the last pass)

15% min tool rad -.3

.02 left on all surfaces in x and z

NO step up

 

 

[Thee Rickster ™]

It not unusual for MC to skip the odd z LVL path.

I get this mostly in waterline rest paths

 

When i catch it at the p.c., I change the step down by .001" and regen

then keep doing that until the path does it right, if it doesn't

I go to a legacy path that should do the about the same thing

 

Go to the new forum and place your issue in this thread

CNC chimed in and wants as many X8 issues reported here

 

http://forum.mastercam.com/Topic2846.aspx

[neurosis]

I found it strange that the path generates just fine in X6 but is then broken in both X7 and X8.

 

I had to dig up the original X6 file from one of our backup drives to do what I needed.  I am using the same settings (what is available) in X6 and the tool path generated flawlessly.  No pogo, no re-cutting the same area 5 times and no missing a depth of cut. 

 

I'm not really sure how to address this since I can't send this file to the QC dept. This (and a couple of other problems i've found in the opti paths) really need to be addressed. If missed in verify (who really has time to watch every single pass of every single tool) this could do some damage. The insert on this particular tool isn't even .4.

[Thee Rickster ™]

"If missed in verify (who really has time to watch every single pass of every single tool)"

 

Nobody does. But when you break a cutter because of a faulty path....

 

 

 

Just at minimum, explain it to them and Maybe they will look at it or

confirm they have enuf concerns to do something about it.

 

This X8 release has alot of X7 and prior, carry overs....LOL

 

At least you get to use X8

[neurosis]

This X8 release has alot of X7 and prior, carry overs....LOL

 

At least you get to use X8

 

 

The carry overs I can handle. You are familiar with the issues and have more than likely found work arounds. It's the regressions that frustrate me.

[Thee Rickster ™]

The carry overs I can handle. You are familiar with the issues and have more than likely found work arounds. It's the regressions that frustrate mnot as familiar

Not really, i am helping you, help them and that helps us all.

 

I just test the same old issues when they let loose a major release.

 

If the same old cumbersome problems are there, then I can only

assume and watch threads and test other issues that will directly

affect me, before the first MU release comes out.

Then hope they addressed the toolpath issues and pray they fix

old work arrounds, bugs, known inefficiencies...etc.  (Same game, different release.)

 

Its actually a written ISO protocol at my work, for only this software.

[crazy^millman]

Yes broken some endmills with that one. Like you are doing Verify each line of code and backplot each section and see if it does not take off. If it does change your numbers a little bit up or down and it will go away. X8 is better about it, but still will happen. I have used NCSimul and it's volumetric verification to catch these types of errors. Still working it all out, but looks like that will be my sanity check for these types of tools paths moving forward.

 

Get it done and so your best to catch them about all we can do. Cool thing I learned was a Hydraulic Chuck will break an endmill off before allowing it to pull out of the holder when this happens. Glad it did not tear up the chuck.

[neurosis]

In this particular case, I am using a 2" insertable face mill. The inserts are only about .325 tall. That depth of cut 2X deep ends up being .404 which is well below the insert.  I would be moving material with a $400 cutter body and doing it at 500ipm.

[crazy^millman]

Well it was a $375 endmill I tore up last time and about 2 days before I finally figured out all that was going on. I have bug numbers for it, but again be aware it is a possible problem and look for it and move on.

[Joe788]

If you do a fresh Optirough path on the same part, with all the exact same parameters, does it still do it? 

[neurosis]

If you do a fresh Optirough path on the same part, with all the exact same parameters, does it still do it? 

 

 

Good question.  I'll see if I can look in to that here in a bit.

[crazy^millman]

If you do a fresh Optirough path on the same part, with all the exact same parameters, does it still do it? 

 

 

Not as much, but yes in X8 I have still seen it.

[neurosis]

If you do a fresh Optirough path on the same part, with all the exact same parameters, does it still do it? 

 

 

I finally got the time to try this out. The results were the same.