Climb Mill On Vector

This forum is for general discussion regarding VCarve Pro

Climb Mill On Vector

Postby kstrauss » Thu Jul 11, 2019 8:11 pm

The climb/conventional toggle seems to be ignored when machining ON an open vector (direction is honoured when left or right of an open vector and also works ON a closed vector).

I want to use a V-bit to chamfer the edges of features. I have created an offset path for the V-bit and cut ON it. This works fine other than the direction. If I use Allowance offset to move the point of the V-bit off the edge of the project then Vcarve uses the diameter of the V-bit to generate the path rather than just offsetting the point by the requested amount.

The only way that appears to work is to use Node Edit to reverse the direction of the vector. Is there an easier way?
kstrauss
Vectric Craftsman
 
Posts: 134
Joined: Mon Apr 29, 2013 3:37 am
Location: Cobourg, ON, Canada
Model of CNC Machine: Tormach PCNC770

Re: Climb Mill On Vector

Postby tomgardiner » Thu Jul 11, 2019 8:31 pm

When you think about it, if one side of a cut is climb cutting then the other side is conventional. That is why the option is nullified for cutting on the line. You do have the option however to change the direction of a cut on an open vector by changing the start point of the vector in node editing.
tomgardiner
Vectric Wizard
 
Posts: 365
Joined: Thu Oct 02, 2014 1:49 pm
Model of CNC Machine: FMT Patriot 4 x8

Re: Climb Mill On Vector

Postby kstrauss » Mon Jul 15, 2019 1:34 am

Of course but as I originally mentioned "I want to use a V-bit to chamfer the edges of features" so the tool is only cutting on one side. In my case climb versus conventional is meaningful.
kstrauss
Vectric Craftsman
 
Posts: 134
Joined: Mon Apr 29, 2013 3:37 am
Location: Cobourg, ON, Canada
Model of CNC Machine: Tormach PCNC770

Re: Climb Mill On Vector

Postby tomgardiner » Mon Jul 15, 2019 1:46 am

Sorry, guilty of skimming your post before responding. Nasty habit.
The only other way to do this I can think of is to profile outside and use an offset and start depth with a little math to achieve a chamfer. More work I think to achieve the club cut control. I'm not at my computer to test this.
tomgardiner
Vectric Wizard
 
Posts: 365
Joined: Thu Oct 02, 2014 1:49 pm
Model of CNC Machine: FMT Patriot 4 x8

Re: Climb Mill On Vector

Postby TReischl » Mon Jul 15, 2019 1:56 am

kstrauss wrote:The climb/conventional toggle seems to be ignored when machining ON an open vector (direction is honoured when left or right of an open vector and also works ON a closed vector).



Does not appear to ignore it on my system???? I tell it to climb, it goes one direction, tell it to go conventional it goes the opposite direction. So it is not ignoring anything.

However, since it is on the line it has no way of determining which way is which so yes, you may need to switch the vector direction or just click the opposite to climb or conventional.

Think about it, YOU are telling the software it is ON the line, how is it supposed to know which way you want to go? Until you declare inside or outside it has no way of knowing. Computers are not that smart contrary to all the blather about "artificial intelligence" now available from a car dealer near you.
"If you see a good fight, get in it." Dr. Vernon Jones
User avatar
TReischl
Vectric Wizard
 
Posts: 2930
Joined: Thu Jan 18, 2007 6:04 pm
Location: Leland NC
Model of CNC Machine: 8020 Build 48X36X10 RP 2010 Screenset

Re: Climb Mill On Vector

Postby Leo » Mon Jul 15, 2019 2:06 pm

You can set the diameter in tool data to .002 in the tool path dialog box. Then select outside milling. This will allow the climb mill to work for you.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2957
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Climb Mill On Vector

Postby TReischl » Mon Jul 15, 2019 2:49 pm

Leo wrote:You can set the diameter in tool data to .002 in the tool path dialog box. Then select outside milling. This will allow the climb mill to work for you.


I don't think that works for a v bit Leo. If you set it to a small value like you suggested then the maximum depth pass will be very small.

Example:

Capture.JPG


Then if you set it to a bit bigger, like .02 you get:

c2.JPG


Notice that the maximum pass depth is controlled by the diameter of the tool.
"If you see a good fight, get in it." Dr. Vernon Jones
User avatar
TReischl
Vectric Wizard
 
Posts: 2930
Joined: Thu Jan 18, 2007 6:04 pm
Location: Leland NC
Model of CNC Machine: 8020 Build 48X36X10 RP 2010 Screenset

Re: Climb Mill On Vector

Postby ger21 » Mon Jul 15, 2019 3:50 pm

Just reverse the direction of the vector.
Gerry - http://www.thecncwoodworker.com
ger21
Vectric Wizard
 
Posts: 1498
Joined: Sun Sep 16, 2007 2:59 pm
Location: Shelby Township, MI, USA
Model of CNC Machine: Custom DIY

Re: Climb Mill On Vector

Postby Leo » Mon Jul 15, 2019 4:20 pm

TReischl wrote:
Leo wrote:You can set the diameter in tool data to .002 in the tool path dialog box. Then select outside milling. This will allow the climb mill to work for you.


I don't think that works for a v bit Leo. If you set it to a small value like you suggested then the maximum depth pass will be very small.


Yes it will work.

Sooooo - set the stepover to .001 - this is a profile cut - not a pocket.

If he is setting a depth of cut on a profile toolpath it will offset the tool by .002 from tool centerline. The offset isn't really going to matter because is is so small of an amount. The depth will take care of itself and cut the chamfer - albeit, offset by .002

Now if this was V-Carving - it would not work.

EDIT IN:

OK so just reread your post. Maybe then, create a different tool. I have not tried any of this but there must be a way.

I will play with it at lunchtime

There are several way to skin this cat. All of which end up with the same result.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2957
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Climb Mill On Vector

Postby Leo » Mon Jul 15, 2019 4:36 pm

OK - it works by using a straight end mill, You just cannot see a chamfer on the part

I will retract my earlier recommendation about changing the tool diameter

Normally, I offset the toolpath by a couple of thou, but don't pay attention to cutter direction.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2957
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: Climb Mill On Vector

Postby TReischl » Mon Jul 15, 2019 7:49 pm

Thanks Leo.

Normally what I do is offset the vector by .010 (that is so I can see it easily).

Then I do a quick sketch in Corel showing the vbit with the point on the line like this:

Capture.JPG


And yes, you can make the same sketch in Aspire, I just find it faster in Corel. With a 45 degree chamfer it is really not necessary because the depth of the cut on the offset line is the size of the chamfer plus the offset. With other V bits that does not work.

I do it like that because I do not want the point of the bit running right on the edge of the workpiece, it tends to create a mess. If I have a big enough bit I will offset it even more.

The other thing I try to do is the typical router technique of doing the cross grain cuts first so that it minimizes splintering.
"If you see a good fight, get in it." Dr. Vernon Jones
User avatar
TReischl
Vectric Wizard
 
Posts: 2930
Joined: Thu Jan 18, 2007 6:04 pm
Location: Leland NC
Model of CNC Machine: 8020 Build 48X36X10 RP 2010 Screenset

Re: Climb Mill On Vector

Postby rscrawford » Tue Jul 16, 2019 12:51 am

Just change the direction of the vector. A vector is just a line with a direction, so you can get the tool to start at the opposite end to cut the opposite direction.
Russell Crawford
http://www.cherryleaf-rustle.com
User avatar
rscrawford
Vectric Wizard
 
Posts: 949
Joined: Mon Jan 17, 2011 6:49 pm
Location: Wetaskiwin, Alberta
Model of CNC Machine: CAMaster Cobra 408 ATC, ShopSabre IS408


Return to VCarve - General

Who is online

Users browsing this forum: No registered users and 34 guests