Material cutting

[mezalick]

Greetings all,
Just a short question that I can't explain.
Why does the finish toolpath over cut the material when the settings of "Material Boundary", "Raster" and "Machine Bed" are used?
If that would be the normal process wouldn't it also over cut on the left side of the material and not just the right side.
Thanks
Michael

[adze_cnc]

Couple of questions:

1. does raster 90 degrees exhbit same symptom?
2. offset?
3. on the left the model looks like it has a vertical wall yet on the right it appears to have a zero-thick ege. Is model tilted?

[mezalick]

Couple of questions:

1. does raster 90 degrees exhbit same symptom?
2. offset?
3. on the left the model looks like it has a vertical wall yet on the right it appears to have a zero-thick ege. Is model tilted?

Raster 90 degrees does not show this same results.
There is on offset .
The model is not tilted..

[SteveNelson46]

I tried the same settings on one of my 3d projects and I didn't get the results that you are getting. I can't really tell from your pic but it looks like you may have an object that extends to the edge on the right side and not on the left. That may be the cause.

[SteveNelson46]

Here are the pics of my attempts

[ohiolyons]

I added a zero plane and shoved it over the edge and that didn't replicate your problem.

I'm stumped.

[mezalick]

I tried the same settings on one of my 3d projects and I didn't get the results that you are getting. I can't really tell from your pic but it looks like you may have an object that extends to the edge on the right side and not on the left. That may be the cause.

The model is not close to the edge of the material so that's not the problem

[mezalick]

I added a zero plane and shoved it over the edge and that didn't replicate your problem.

I'm stumped.

Yes, adding a Zero plane does correct the issue as well as a negative offset ( -0.0001) will correct it.
So does changing the ZZero position from the spoilboard to the material surface.

In the end, there are several ways around it but it doesn't answer the question of why it's happening.
Michael

[mezalick]

Just an update.
I found the problem and it was a "stray" pixel or two that were sitting at the depth of the material thickness.
So, the program saw those pixels and added them to the model thickness.
I used a separate program to delete them.

All's good now, thanks for your help.


Michael

[ohiolyons]

So any idea on the origin of the stray pixel?

Something you did while creating the component?

Or was it part of the model you imported?

[mezalick]

So any idea on the origin of the stray pixel?

Something you did while creating the component?

Or was it part of the model you imported?

John,
I did not make the model but was asked to find out the reason for the issue from a friend.
The model has all the looks of a Russian made model.
I believe it was made in a different 3D software and that is what caused the problem.

Michael

[ohiolyons]

Good to know it was part of the original model.

So a few stray pixels, how did you locate them?

[mezalick]

John, it was a guess and I used some editing software to delete them from the bottom of the model.
Just took a bit of logical thinking on how the software works.