optirough mc2018

[Mark VIII]

Why is it that when I try to use stock rest material, all previous operations, to define the stock that MC always makes the first cut depth at the top of the part instead of the actual, desired depth of cut? For example. If I want my endmill to have a depth of cut of 1.0 and I state top of the stock to be Z), it will make the first pass at Z0 instead of Z-1.

[gcode]

1 hour ago, Mark VIII said:

Why is it that when I try to use stock rest material, all previous operations, to define the stock that MC always makes the first cut depth at the top of the part instead of the actual, desired depth of cut? For example. If I want my endmill to have a depth of cut of 1.0 and I state top of the stock to be Z), it will make the first pass at Z0 instead of Z-1.

use the depth limits settings to force your first pass to your desired depth

[Mark VIII]

Yes, Gcode. I understand that you can do that. However, That completely eliminates the ability to step up to cut features, like tapered walls, that are above the first depth of cut. See where I am going with this?  If tapered walls starting from Z0, and I set the minimum depth at Z-1.0 I must create a separate path to clean up those features.

I remember when Dynamic milling first came out, this was not a problem. Once the "upgraded" to optipath this became a problem.

[gcode]

try running a verify session of all previous operation

save that as an STL file

use that STL to define a stock model and use that as rest stock on your optirough poass

[Mark VIII]

I am confused. Why would an STL be different than my initial stock setup? My optirough path is the first operation.

[Leon82]

Try a stock model with all ops, then your optirough with rest material one op, pick the stock model

[Mark VIII]

Thank you. Same result.

[gcode]

can you share the file?

[Mark VIII]

Sorry, G-code. But, it's pretty easy to duplicate since it happens every time I try to use rest model. I finally just gave up. Like I said. It worked great on the original Dyna paths.

[crazy^millman]

Your step shallow settings are the culprit here. Set your Max .01 to .02 above the highest part of the rough stock. Make sure your boundary is at least 3X your tool diameter bigger than the part. I have seen some use negative values with center to accomplish the same thing. You must use Stock and the previous operation and that previous operation needs to be a defined stock model. You take material off and then make another Opti-Rough and want your results to be good then make another stock model and then make sure that new Opti-Rough uses that new stock model. Rinse and Repeat. The Steep/shallow is the key here and once you wrap your brain around the how you stopping question the why.

Now beware of getting too many stock models linked together. We have found as group best to make a Pmesh of the stock model once you are happy with results. Save the stock model as a Pmesh to a level. Then delete all source operations that made that stock model and grab the Pmesh to make an unlinked to operations stock model. Now if Operation 2 gets changed and you have 20 stock models past it you will not wait for hours for them all to regenerate. You will not make all your operations past that point dirty either. Again wrap brain around the how to make your life easier and not the why you need to and then it gets easier to get done.

[Mark VIII]

Interesting 5TH. The previous Dyna paths were able to accomplish this with 1 operation (although the original Dyna had some problems as well). Why would they choose this method? Is there some reason this would be considered better that I am not seeing?

[crazy^millman]

1 minute ago, Mark VIII said:

Interesting 5TH. The previous Dyna paths were able to accomplish this with 1 operation (although the original Dyna had some problems as well). Why would they choose this method? Is there some reason this would be considered better that I am not seeing?

Because it works. I have never have seen it work with one operation so not sure what your referring to. I have always done it this way even when I was making toolpaths with solid models before we even had stock models to work with.

[Leon82]

Is saving to a pmesh in the stock model parameters page or somewhere else?

[Guest]

2 minutes ago, Leon82 said:

Is saving to a pmesh in the stock model parameters page or somewhere else?

Right click in the Ops Manager, it's down the list under staok model

[Mark VIII]

On 9/11/2018 at 1:16 PM, 5th Axis CGI said:

Because it works. I have never have seen it work with one operation so not sure what your referring to. I have always done it this way even when I was making toolpaths with solid models before we even had stock models to work with.

 

This is cumbersome. Yes, before optirough replaced the origianal Dynamic paths, this was not a problem. I wish they would correct the issues for optirough.