Drilling tool path goes crazy when setting virtual zero

Drilling tool path goes crazy when setting virtual zero

Postby scovell » Wed Dec 13, 2017 10:40 pm

I setup a simple drilling tool path to drill six 1/4 holes in a board that is 5.5 " wide and 12" long.
When I load it into my CNC Shark, it prompts me to set virtual zero, when I click okay the router attempts to run past the usable table space, which I then abort.

I am running VCarve 8.5
The starting XY Data position is set to the upper left circle (Upper left hand corner of the board).

I'm sure it is a user error as the other cutting paths run as expected. Needless to say I don't use the drilling tool path very often.

I have attached a copy of the .crv and .tap files.

Thanks,

Mike
Attachments
drill2.crv
(54.5 KiB) Downloaded 34 times
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby Adrian » Wed Dec 13, 2017 10:44 pm

Is the upper left the correct XY zero position for your machine? It's the bottom left on most machines.
User avatar
Adrian
Vectric Archimage
 
Posts: 8226
Joined: Thu Nov 23, 2006 2:19 pm
Location: Surrey, UK
Model of CNC Machine: ShopBot PRS Alpha 96x48

Re: Drilling tool path goes crazy when setting virtual zero

Postby Rcnewcomb » Wed Dec 13, 2017 11:15 pm

You also have the home Z set to 1.8" above the material. Do you have enough Z travel for that? A value of 0.5" might be a better choice.
- Randall Newcomb
10 fingers in, 10 fingers out - another good day in the shop
User avatar
Rcnewcomb
Vectric Wizard
 
Posts: 2929
Joined: Fri Nov 04, 2005 5:54 am
Location: San Jose, California, USA
Model of CNC Machine: GCnC/WinCNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Wed Dec 13, 2017 11:31 pm

Thank you both for the quick replies.

I can set the starting point to any of the corners or center of the defined space. I will try starting at the bottom left.

I typically have the Z position higher than needed to give me a little bit more room to place the touch plate when the program is first loaded.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Wed Dec 13, 2017 11:53 pm

I set the XY zero position to the bottom left of the board. I load the code into the machine which then asks if I want to use virtual zero, when I click okay the router runs up to the top right of the cutting surface and I abort it before it grinds the gears.

I ran another program using a profile tool path and the machine runs as expected.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby joeporter » Thu Dec 14, 2017 5:11 pm

"The starting XY Data position is set to the upper left circle (Upper left hand corner of the board)." I am not sure what you are saying, is XY zero the upper left corner of the material or the upper left circle? I think you have to zero off the material, not a part of the drawing. Hope this is of some help...joe
Attachments
Drill Crazy.PNG
joeporter
Vectric Wizard
 
Posts: 484
Joined: Tue Jul 21, 2009 8:22 pm
Location: Marietta, GA.
Model of CNC Machine: ShopBot Buddy Standard

Re: Drilling tool path goes crazy when setting virtual zero

Postby Adrian » Thu Dec 14, 2017 5:20 pm

scovell wrote:I set the XY zero position to the bottom left of the board. I load the code into the machine which then asks if I want to use virtual zero, when I click okay the router runs up to the top right of the cutting surface and I abort it before it grinds the gears.

I ran another program using a profile tool path and the machine runs as expected.

You have to set the XY zero position on the Job Setup to where the machine expects it to be. It's not a setting you can guess at and change around. Where did you set it with the profile toolpath that worked ok? Set it in the same place and try again.
User avatar
Adrian
Vectric Archimage
 
Posts: 8226
Joined: Thu Nov 23, 2006 2:19 pm
Location: Surrey, UK
Model of CNC Machine: ShopBot PRS Alpha 96x48

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Thu Dec 14, 2017 7:18 pm

The starting position defined in the Vectric software is shown in image 1.
image01.jpg


The machine's starting XY position can be seen in image 2.
image02.jpg


Both settings are the same when doing a profile cut, which runs as expected.

Thanks for your time.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby joeporter » Thu Dec 14, 2017 7:46 pm

Scovell, when you changed your X Y zero to the lower left corner, did you recalculate your tool paths and save them to be used to run the project? This can be over looked. I am not familiar with a Shark, but when I am in the starting place on my machine (ShopBot), my control board will show 0X and 0Y. I think yours should show that also? Then, everything should run as you planned. Hope this is of some help...joe
joeporter
Vectric Wizard
 
Posts: 484
Joined: Tue Jul 21, 2009 8:22 pm
Location: Marietta, GA.
Model of CNC Machine: ShopBot Buddy Standard

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Fri Dec 15, 2017 12:55 am

Hi Joe,

I did recalculate and save a new file. (Saved it under a different name to ensure I got the new one loaded).

I also reset the machine's starting XY position to the bottom left.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby joeporter » Fri Dec 15, 2017 4:36 pm

I am at a loss, when things like this happen with ShopBots people always start talking about machine or controller or post processor abnormalities like unit values or lost communications, etc. Have you talked to someone on the Shark forum? Sometimes things like these can have electrical or machine control problems. Your file runs fine for me in the preview and what you see is what you get all else being equal. I hope you find an answer and please let us know when you do...joe
joeporter
Vectric Wizard
 
Posts: 484
Joined: Tue Jul 21, 2009 8:22 pm
Location: Marietta, GA.
Model of CNC Machine: ShopBot Buddy Standard

Re: Drilling tool path goes crazy when setting virtual zero

Postby Gaffboat » Fri Dec 15, 2017 6:20 pm

The Shark virtual zero requires that you set the XY data zero to the CENTER of the job and define the size of the virtual zero area. If you set the zero to anywhere other than center you will encounter the problem you are having.
User avatar
Gaffboat
Vectric Apprentice
 
Posts: 15
Joined: Wed Jun 14, 2017 12:17 am
Model of CNC Machine: Shark HD4

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Sat Dec 16, 2017 3:58 pm

Gaffbot, I had high hopes, but the bit still moves up to the farthest upper right hand corner of the work space when I attempt to setup virtual zero on the run.
I triple checked to ensure that I had set the xy data zero to the middle of the board in both vectric and on the shark cnc itself.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Re: Drilling tool path goes crazy when setting virtual zero

Postby Gaffboat » Sat Dec 16, 2017 5:19 pm

Have you defined the size of the virtual zero area in APPS section of your Shark? You may have to modify it fit your current project. Then when you set it on the fly for the job you will need to use the touch plate at five positions: each of the four corners and the center. When you start the virtual zero sequence the gantry moves to one corner and the bit descends to meet the touch plate. When it does, it shows you the correction and asks if you want to use the setting. As soon as you say OK it moves to the next corner and repeats. You have to keep moving the touch plate to keep up with the gantry position so it is ready when the bit lowers again. The center position is the last one checked by the virtual zero app.

If you have done all of this and are still having problems, I'm as mystified as you are.
User avatar
Gaffboat
Vectric Apprentice
 
Posts: 15
Joined: Wed Jun 14, 2017 12:17 am
Model of CNC Machine: Shark HD4

Re: Drilling tool path goes crazy when setting virtual zero

Postby scovell » Sat Dec 16, 2017 5:25 pm

I have not defined the size of the virtual zero area in APPS section of my shark. I can't recall defining this area in the past, but perhaps it was done when I first set up the machine. I shall report back. Thank you.
User avatar
scovell
 
Posts: 15
Joined: Sat Jul 16, 2016 4:57 pm
Location: O Fallon, MO USA
Model of CNC Machine: Shark CNC

Next

Return to Control Software related questions

Who is online

Users browsing this forum: No registered users and 3 guests