Diamond drag bit problem

This section is for useful tips and tricks for Aspire
Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Diamond drag bit problem

Post by Nicolanti »

I am using Aspire with thin brass sheets. This is the second project in a row that I am having a problem with. One just before these two came out fine. I am still fairly new to the Aspire/CNC scene, so, I believe the problem is my ignorance.

On both projects, the engraving is coming out bigger than it shows in the Aspire program. No matter what parameters I change it does not change the size of the actual engraving. I have tried creating a sized box and putting the text within the box to make sure it does not engrave outside the boundary of the box. That does not help either.

Any advice would be greatly appreciated.

Thanks,

David

User avatar
Adrian
Vectric Archimage
Posts: 14544
Joined: Thu Nov 23, 2006 2:19 pm
Model of CNC Machine: ShopBot PRS Alpha 96x48
Location: Surrey, UK

Re: Diamond drag bit problem

Post by Adrian »

Can you attach some pictures and ideally the project file (CRV3D) itself? It could be many things so a bit more info will help narrow it down.

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

I am working on attaching the aspire file. It says file too large....

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

Here is the file. Thanks

this was an ealier version that was actually a larger font and material size; yet it is only 1 kb where my smaller font and smaller material size file in 18 kb?
Attachments
macy bigger.crv3d
(1.14 MiB) Downloaded 81 times

User avatar
Adrian
Vectric Archimage
Posts: 14544
Joined: Thu Nov 23, 2006 2:19 pm
Model of CNC Machine: ShopBot PRS Alpha 96x48
Location: Surrey, UK

Re: Diamond drag bit problem

Post by Adrian »

Can't really tell a lot from that file as the single toolpath doesn't relate to the vectors.

There are a couple of issues with the font though which may or may not be the cause of your problems. The lower case b's have a crossover on them which can mess up some toolpaths. You would need to convert the text to curves and node edit to remove those or convert to curves and do an offset/inset.

What type of toolpath are you using for the text? If it's a v-carve/engraving toolpath one problem I've seen a few times is people setting a start depth when they meant to set a flat depth and that will make all the text bigger due to the nature of how an angled bit cuts.

Grasping at straws a bit though without pictures or the full file.

If the file with the issues is too big to upload you could try zipping it or using a cloud service such as DropBox or OneDrive.

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

Thanks Adrian! I will try your suggestions.

I will work on this this morning. Also trying to watch the Annual UGM.

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

Well, I fixed the problem with the lower case “B”.and reran it. That did not help.
Here is the link to the file in Dropbox.


Again, thank you for taking your time to help me. I know how valuable time is!

https://www.dropbox.com/s/qmpepqdxne6gq ... crv3d?dl=0

User avatar
Adrian
Vectric Archimage
Posts: 14544
Joined: Thu Nov 23, 2006 2:19 pm
Model of CNC Machine: ShopBot PRS Alpha 96x48
Location: Surrey, UK

Re: Diamond drag bit problem

Post by Adrian »

There's nothing obviously wrong with the file that I can see. The preview is correct and that generally means it's going to be an issue outside of the Vectric software with how you're setting up the job in your controller software and/or physically on the machine.

Is there anything different that you can think of that you did with the ones that worked correctly and the ones that didn't?

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

Well, I fixed the problem with the lower case “B”.and reran it. That did not help.
Here is the link to the file in Dropbox.


Again, thank you for taking your time to help me. I know how valuable time is!

https://www.dropbox.com/s/qmpepqdxne6gq ... crv3d?dl=0

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

No, not that I can think of. The two different projects each use different fonts than the one that did work. I am using the Quick Engrave tool path. I am stumped.

User avatar
adze_cnc
Vectric Wizard
Posts: 4327
Joined: Sat Jul 27, 2013 10:08 pm
Model of CNC Machine: AXYZ 4008
Location: Vancouver, BC, Canada

Re: Diamond drag bit problem

Post by adze_cnc »

Nicolanti wrote:
Wed Sep 08, 2021 8:53 pm
On both projects, the engraving is coming out bigger than it shows in the Aspire program. No matter what parameters I change it does not change the size of the actual engraving.
Unfortunately "bigger" and "change the size" aren't very diagnostic without qualifiers (e.g. twice as big, should be 1cm but is 10cm, etc.).

Can you upload a picture of the bad brass engraving and perhaps a picture of the Aspire toolpath simulation (for those of use without Aspire)?

Perhaps also some details describing where on the brass piece things are wrong?

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

I will do that in a little while. Thank you.

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

This is an engraving of a poem that a friend of mine wrote for another friend for a hole in one. At the end, the last line is "Let it fly, and do it again". For the portion of the line that reads "Let it fly and DO IT", A measurement in the 2D view shows 3.01 inches. However, the actual engravement shows 4 3/16 inches, approximately 39% larger than the correct measurement.

The placement of the entire engraving is proper.

One of the attached pics is the measurement of the actual engraving; the second one is the measurement of the Aspire 2D measurement.

Thanks for looking.
Attachments
12.09.2021_18.11.16_REC.png
IMG_0815.jpg

mickecarlsson
Vectric Craftsman
Posts: 129
Joined: Tue Feb 06, 2018 9:18 pm
Model of CNC Machine: CNC 6040, Vectric Aspire, UCCNC
Location: Skane, Sweden

Re: Diamond drag bit problem

Post by mickecarlsson »

Could it be a machine/controller problem? You have not mentioned what machine&controller you have.
What preprocessor do you use?
How do you transfer the gcode from you computer to the CNC?

Nicolanti
Posts: 19
Joined: Sat Aug 14, 2021 2:29 pm
Model of CNC Machine: Longmill 3030

Re: Diamond drag bit problem

Post by Nicolanti »

I have the Longmill 30 x 30 with an Arduino controller. I use Gsender to communicate with the CNC router.

Post Reply