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CNC Shark Forum • View topic - Loosing depth on cuts

Loosing depth on cuts

Questions/answers/discussion about initial setup of your CNC Shark

Moderators: sbk, al wolford

Loosing depth on cuts

Postby GaryShaine » Thu Dec 26, 2019 12:21 am

Hi, I'm a new Shark HD5 user. I seem to be having a hard time getting the depth of cut right. Everything looks great in VCarve and I've calculated everything very carefully. But, when I save the tool path onto the USB & transfer it to my controller for the cut, the cut seems to lose 1/8 to 1/4" depth on 2 of the toolpaths. I'm zeroing it out after every tool change to the bottom left, top of material (1x6 pine board). For a post processor, I'm using: CNCShark-USB Archs (inch) (*.tap)

Without going too much into details, anyone have any ideas where to start troubleshooting?

Thanks for any help!
Gary
GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

Re: Loosing depth on cuts

Postby tonydude » Thu Dec 26, 2019 10:44 am

Your board might not be perfectly even, you need a touch plate https://www.nextwaveautomation.com/shop ... p121064790
for virtual zero.

Tony
Buffalo,NY

"What will matter is not what you bought but what you built; not what you got, but what you gave”

Aspire 10.017, photo vcarve, cnc mako shark extended bed with the new upgraded HD 5 gantry with Led pendent.
tonydude
 
Posts: 1544
Joined: Tue Aug 17, 2010 9:23 am
Location: Buffalo,NY

Re: Loosing depth on cuts

Postby GaryShaine » Thu Dec 26, 2019 12:50 pm

Thanks for the reply Tonydude. I do plan on getting one in the near future.
For now, I have tried resurfacing the board before any other cuts. I’m about to try some different project to see if there is a consistency there.
GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

Re: Loosing depth on cuts

Postby GaryShaine » Thu Dec 26, 2019 3:17 pm

Hi,
I tried another cut using a file I got from the Next Wave forum. It's the pendent stand plans that are set up for half inch mdf which is pretty flat. It's loosing 1/4" depth consistently throughout, so it's cutting only halfway through & I believe it to be very flat. When zeroing the Z, I even went a little lower than the surface. What could be going on here? I was thinking maybe the post processor, but I believe I'm using the correct one (albeit it seems it was last updated in 2012)
This is the one I'm using... CNCShark-USB_NewArcs_inch Vcarve, Aspire and Cut 3D Post Processor (1/13/2012)

Here's a quick video of the project...
https://youtu.be/9oOnizzvZoc
GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

Re: Loosing depth on cuts

Postby tonydude » Fri Dec 27, 2019 7:48 am

pp.PNG
(8.06 KiB) Not downloaded yet
use this post processor. Is the gantry set too high? Might lower the gantry, I have mine set at the middle ones.

Tony
Buffalo,NY

"What will matter is not what you bought but what you built; not what you got, but what you gave”

Aspire 10.017, photo vcarve, cnc mako shark extended bed with the new upgraded HD 5 gantry with Led pendent.
tonydude
 
Posts: 1544
Joined: Tue Aug 17, 2010 9:23 am
Location: Buffalo,NY

Re: Loosing depth on cuts

Postby GaryShaine » Fri Dec 27, 2019 7:39 pm

GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

Re: Loosing depth on cuts

Postby tonydude » Sat Dec 28, 2019 12:37 am

Can you post the depth of cut of your profile toolpat? Here is an example, don't worry about my numbers

Tony
Attachments
cut.PNG
(11.12 KiB) Not downloaded yet
Buffalo,NY

"What will matter is not what you bought but what you built; not what you got, but what you gave”

Aspire 10.017, photo vcarve, cnc mako shark extended bed with the new upgraded HD 5 gantry with Led pendent.
tonydude
 
Posts: 1544
Joined: Tue Aug 17, 2010 9:23 am
Location: Buffalo,NY

Re: Loosing depth on cuts

Postby GaryShaine » Sat Dec 28, 2019 10:12 am

Screenshot_1.jpg
GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

Re: Loosing depth on cuts

Postby tonydude » Sat Dec 28, 2019 12:04 pm

Did you reset your z zero for the bit. Recheck all the toolpaths again, might of missed something.

Tony
Buffalo,NY

"What will matter is not what you bought but what you built; not what you got, but what you gave”

Aspire 10.017, photo vcarve, cnc mako shark extended bed with the new upgraded HD 5 gantry with Led pendent.
tonydude
 
Posts: 1544
Joined: Tue Aug 17, 2010 9:23 am
Location: Buffalo,NY

Re: Loosing depth on cuts

Postby GaryShaine » Sat Dec 28, 2019 2:42 pm

Ok... I figured it out. Of course it would be user error. Lol. I can admit it. So, my issue... the height of my router. At the z axis lowest point, I was 1/4” shy from the bottom of the material. That would explain why the 1/4” pocket cut was fine. Then in the profile cut, it would hit the bottom and reset the zero. From that point on, the cuts would start above the material.

Man... took me long enough to figure that out. #geniusatwork

I appreciate the help and hope this might be able to help any other noobs out there!
GaryShaine
 
Posts: 12
Joined: Wed Dec 04, 2019 11:26 am

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