Why did it do this?

[ajinjax]

Bobcam left this little step between these two parts.



The surface should be the same all the way around.

It's just between the parts the ends are fine.



Anyone got ideas on why that step is there?

[tjones]

The only way anyone could tell would be to check the code. I have seen simular results caused by machine lag but it really looks like it is in the code.

The cad file and code would most likely need to be checked for any ideal of why.

[ajinjax]

The only way anyone could tell would be to check the code. I have seen simular results caused by machine lag but it really looks like it is in the code.

The cad file and code would most likely need to be checked for any ideal of why.

I was just looking at the code and created surface from NC. The Z depths #'s are the same.

[Oldmanandhistoy]

I was just looking at the code and created surface from NC. The Z depths #'s are the same.

Hi,

Is it a stepper motor system; if it is could be lost steps?

Was the machining done in one continuous run?

Were the surfaces machined with the same cutter (tool change)?

John

[ajinjax]

Hi,

Is it a stepper motor system; if it is could be lost steps?

Was the machining done in one continuous run?

Were the surfaces machined with the same cutter (tool change)?

John

Yes (But that step is in between every set, not just one.) ,yes, and yes.

[Oldmanandhistoy]

Yes (But that step is in between every set, not just one.) ,yes, and yes.

Only other thing I can think of is the roughing pass was to deep or cutter heights (roughing and/or finishing) not set correctly.

Did the roughing cut pass thru the stepped area?

John

[The One]

Can you post the file? I may be able to help determine the cause and solution.

Regards

[Andre' B]

Kind of looks like things are moving around as the machine heats up.

[ajinjax]

Can you post the file? I may be able to help determine the cause and solution.

Regards

Well, there's 459738 lines of code and it's a 11.5Meg file.

I tried to isolate a small part of the code but it's still too long.

------

I doubt it had anything to do w/ the matl left over from the roughing pass, it's just foam.

[tjones]

If it is not the roughing pass cutting deeper than the finish pass and the Z depths are correct then it goes back to machine issues.

Both of these would be the areas to look into. If the machine is lagging due to whatever reason then slowing it down may improve the problem. If it is a roughing issue then simply change the Z comp of the rougher or change the program to leave more stock for the finisher.

In light material like this the roughers with helical flutes tend to draw the material up. This would explain why there is stack left only in those areas. Where there were deeper cuts the material would be pulled with more force and cause this problem.

We are only assuming as well that you made both a roughing and finishing cut so without more info it is hard to surmise the correct answer. But if I were betting I would go with the cut drawing the foam up in the deep areas of cut and since these areas are between two raised portions the cut is going down then back up causing the foam not to be drawn up.

[ajinjax]

But if I were betting I would go with the cut drawing the foam up in the deep areas of cut and since these areas are between two raised portions the cut is going down then back up causing the foam not to be drawn up.

Humm I didn't even think about that.

Also, the tool was a 1/4" Ball nose, taking steps @ 0.020" going from left to right (looking at the picture) if that means anything.

[Kiwi]

To establish if the problem is your code. Zoom in on the toolpath on the CAD side of BCC and read the Z coords of the lines in the offending areas and see if the same or not.