Problem cutting clipart.

[mwright]

A couple of weeks ago I run my first clipart (eagle head in dish) from the Vcarve Pro program. I thought it turned on really good. So I tried running the Bass set in a dish and have not had any luck getting it to run right. Every way that I have tried setting it up it cuts the same way. Where ever or which ever way I set it up, it starts fine but cuts deeper and deeper like the dish is upside down. It does fine on the rough cut, the finish cut is where the problem is.

This is the Eagle Head I did earlier.

This is a picture of how it was cutting till I stopped it.

This is the modeling set up.

This is the tool path set up.

This is the tool set up.

This is how Vcarve shows it should look.

Hope someone can help.
Thanks Mike

[sharkcutup]

1.) Have you slowed the preview simulation down and view it to see exactly how (what stages) it carves? Sometimes we do not see the entire picture of the carving unless we slow the preview simulation down. It helps to get an understanding of the carving process that way we do not prematurely stop the carve in progress.

2.) Have you checked the Material Setup to verify the location of the model within the actual material?

Just a couple of checkpoints/thoughts!

Sharkcutup

[Charlie_l]

Perhaps the Z height of your finishing tool is incorrect in the machine?

[mwright]

Thanks for your reply.
If I understand you right I just went in and slowed down the finish cut and watched it cut with the board at an angle. It cut just as I thought. It started in the center and worked it's way out and up out of the wood.

This is the location in the material.

Thanks Mike

[mwright]

When I jog using the Universal G-code Sender everything moves in the right direction. Z+ moves up and Z- moves down.

Thanks

[Rcnewcomb]

Mike,
I'd recommend using the Windows Snipping tool rather than using your phone for taking screenshots. The images will be clearer easier to read than screenshots taken with a phone.

[mwright]

Randell,
Thanks I now have it on my toolbar and ready to go.

Mike

[ElevationCreations]

Is this a fish in a dish model or a fish model being placed in a dish model? Was your eagle in a dish model which you carved?

If you are trying to place a model in a dish, there are additional steps you need to take, including adding zero plane, merging models, and creating a boundary vector.

[martin54]

Is this a fish in a dish model or a fish model being placed in a dish model? Was your eagle in a dish model which you carved?

If you are trying to place a model in a dish, there are additional steps you need to take, including adding zero plane, merging models, and creating a boundary vector.

Good point, hadn't thought of that but I think it is the bass in a dish model that is supplied with the software, if it were a fish that the op had placed in a dish model then any problems would show in the toolpath preview & the picture that has been posted looks OK if a little small

[mwright]

This is a fish in a dish model that comes with the Vcarve program. Just as the eagle head was the same. That's why I am surprised it did not work. The eagle worked fine, but the fish did not. I have looked at all the settings I can think of on both and they appear to be the same.

Thanks Mike

[Adrian]

The pictures are really low quality so it's hard to be 100% sure but as others have said are you sure it wasn't cutting correctly rather than just the way the cut is done part way through? From what I can see it's cut the fish fine and it's starting the return edge of the dish.

[mwright]

Adrian,
I am sorry for the quality of the pictures, but if you could see the part of the dish that is below the fish it is going down the farther it moves to the outside. Also the outside edge of the cut is really deep.
I have this clipart and a couple others out of Vcarve that I have tried and where ever the cut starts, the farther it moves, the deeper the cut goes. I have tried the clipart without using selected vector in the toolpath and using model boundary in the toolpath. Both vertical cut & horizonal cut and the same thing happens the farther it moves into the cut the deeper it goes.

Thanks Mike

[ElevationCreations]

Is it possible your bit is slipping in the collet or maybe a problem with your Z axis ?

[sharkcutup]

I have tried to duplicate your roughing toolpath but never get anything that resembles the rough outer edges as shown in your image.

Could it be that maybe the machine is too aggressive (speed rate too high in plunge rate) in the Z-axis and possibly loosing steps? A loose bit in the collet?

I am at a loss as to why the outer edges of the dish look like they do after your roughing toolpath. Just not able to duplicate it.

Sharkcutup

[mwright]

The bit slipping in the collet was my very first thought. Unfortunately it was not that easy. The bit was tight and have not had any problems with that. The picture I showed looks the way it does because I stopped the finish cut before it finished the job. As far as the feed rate and plunge rate, on the roughing pass feed is 70 inches/min and plunge is 40 inches/min & finishing pass is 70 inches/min and plunge is 30 inches/min.
To add to my problem I tried running some lettering I created for a sign today and I have the same problem with the Z-axis dropping as it moves from one letter to another. The picture below I hope is better than I have posted before. I have marked on the tape what the depth of each letter is. The way the letters cut was starting at the bottom right moving left and then up and then moving to the right. Also I have the cutting depth set to .125.

Here is the toolpath set-up.

Here is the tool set-up.

I am beginning to believe my problem is not in the Vcarve program, but maybe in the Universal G-code sender, or in the machine itself (Millright Mega V).

Thanks to all Mike