Messages

31

G-Code, CAD, and CAM discussions / Re: Milling Is Off Center

« on: November 20, 2015, 11:48:09 PM »

I was  just looking at  one of my centered cutout failures and noticed that one of the corner radius's (I used a .250" bit) is much less then the other 3 radius's ...  This was an inside through cut .. Seems like all 4 corners should have the same radius no?  The one corners is at least half the radius size...

could that give a clue?

32

G-Code, CAD, and CAM discussions / Re: Milling Is Off Center

« on: November 20, 2015, 04:44:51 PM »

Thanks Ray...

If your v-carve border did in fact cut properly and the preview in V-Carve looked correct for the cutout then the problem is not with V-Carve or Mach3 it is your machine.

Well the sign looks fine up until the actual cutout from the work piece... Like I said, there is a vcarve borber line that round around the sign by .125" that is because I offset the vector to outside .125" and then use that offset outside vector to outside through cut the piece for the sign shape.. Hope that makes sense..

Now that outside through cut looks great on the bottom half, but on the top the bit runs in all the way to the inside vcarve vector and clearly ruins the piece..

That looks like it is the machine?

Again, I have tried many times to center a cutout on a piece of material and it always cuts it off centered.. I have checked this and double checked  many times with the same result... A entered piece in Vcarve coming out offcenter on the workpiece for a basice square through cut...

Did you reduce your speed and acc by 50% as Tweakie said?

I have not got back to the machine yet but will in a bit and post if it helps..

Thanks for all help!

33

G-Code, CAD, and CAM discussions / Re: Milling Is Off Center

« on: November 20, 2015, 03:19:24 PM »

"Thoroughly check the mechanicals of your machine (loose grub screws, binding or tight spots on linears or screws etc.)"

Thanks for the help...

would the above cause a loss of steps?  I should have also said the mill returns to Zero with no problems...

Thanks for help and suggestions because unfortunately this venture is not working at all for me other then creating fire food at this point...

34

G-Code, CAD, and CAM discussions / Milling Is Off Center

« on: November 20, 2015, 03:35:28 AM »

Hi.. I am having a major problem with my machine.. I cut wood signs and use Vcarve with Mach3... 

The Vcarve preview looks perfect, get it to the machine and zero out all the axis's and it always does not center to the work piece.. it runs off center by .25 possibly .5 sometimes...  It ruins every piece of work I do .. I just did a sign with a vcarve border then a .125 offset from the border where it cuts out the sign from the workpiece... The top is fine but the bottom cuts all the way into the vcarve outline and ruins the piece...

Romaxx says it's a programming problem and no one at Vcarve forums have an answer... Where could this problem be in Mach3?

Thanks for any help... I am new to cnc and this problem is ruining all my work...