VCarve CNC Glitch?

[erich2027]

Hello. I did my first real CNC cut today and there was a glitch. I have the Piranha XL and I have to change the bit 3 times for this sign. Anyway, if you look at the top left of the sign, you'll see where the bit took out a piece of the border and I'm not sure why and how to prevent that in the future. Any help would be greatly appreciated!

For the settings of "Area Machine Strategy", I used "Raster", where it starts at the bottom and cuts up from side to side.

[Rando]

Erich2027:

Without evidence of other issues, I'd check that your GCode is correctly setting the path tolerance. Near the top of the tap file there should be a G64 P0.002 or similar small number. If it's missing, or it's 0.1, you'll want to change that. Best place is in the post-processor file. Before you go down that rutted and rock-strewn road, let's confirm that's really the issue.

What's up with that little spot near the gouge, but at the perimeter on that left side? It looks like a smaller nick. Was that part of the same gouge?

Other than that, was the bit doing anything in particular at the time? Was it right at the start, or end, or between sections, any of that?

Given you changed the bit at least twice, we can assume it was tight .

Thom

[tonydude]

If you could post the file someone can help with it, otherwise we don't know what you setup is. This picture doesn't tell us what is wrong with your file.

Tony

[erich2027]

@Rando, It was towards the end of the first stage (first file), I have 3 files since I have to change bits 3 times.

@Tonydude, great idea! I will post the first file. I didn't hang around for the first program, as it was the longest. I was there for the last 2 files, which were the words and the cutout, and the gouge happened before those bit changes.

Also, there was another "nick" above the deeper gouge.

I assume you are asking to post the TAP file? I'll post that. If you want the VCarve file, let me know... Thanks!

[Kayvon]

Are you sure it's not your safe Z? If your origin point is the top corner and you're changing the Z to a lower position when you change bits, it could easily happen.

[erich2027]

Are you sure it's not your safe Z? If your origin point is the top corner and you're changing the Z to a lower position when you change bits, it could easily happen.

My original point is center, and this happened before I changed bits.

[erich2027]

I posted the TAP file. Any help would be appreciated.

[sharkcutup]

erich2027,

Is there any chance that you could post your .crv file (V-Carve or Aspire File)? So that we may look over your design file for any discrepancies that may lead to your problem area.

Sharkcutup

[Kayvon]

I posted the TAP file. Any help would be appreciated.

I don't see anything in the G-code that appears out of the ordinary. X never goes left of -5.66, which is as far left as is goes through much of the project, even on the lower half.

[erich2027]

I guess I'll just have to make another one and see if it happens again.