Cutting into adjacent parts

Discuss Thermwood 3-axis Machinery, Controller, and Software.

Moderators: Jason Susnjara, Larry Epplin, Clint Buechlein, Jim Bullis

Post Reply
Rob Davis
Guru Member
Posts: 351
Joined: Mon, May 23 2005, 5:43PM
Location: Indiana
Contact:

Cutting into adjacent parts

Post by Rob Davis »

I tried to search forum for answer but couldn't find a thread.
We ran these in eCabinets and nested at machine but we are\getting the tools running into adjacent parts. Since nested on Rolling Nest, any suggestions?
Attachments
DSCN1290.JPG
DSCN1288.JPG
DSCN1287.JPG
Thomas strembitsky
Guru Member
Posts: 292
Joined: Fri, Jul 27 2012, 12:30PM
Company Name: true form cabinets
Country: CANADA
Contact:

Re: Cutting into adjacent parts

Post by Thomas strembitsky »

i've had this issue before and the solution it to add a 0.1 mm radius to the tips and it will prevent it from over shooting
Intel(R) Core(TM) i5-6400 @ 2.70GHz 8.00 GB RAM
NVIDIA GeForce GTX 950
Windows 10 Professional 64-bit
http://www.trueform.ca
CS43 cnc
Thomas strembitsky
Guru Member
Posts: 292
Joined: Fri, Jul 27 2012, 12:30PM
Company Name: true form cabinets
Country: CANADA
Contact:

Re: Cutting into adjacent parts

Post by Thomas strembitsky »

Intel(R) Core(TM) i5-6400 @ 2.70GHz 8.00 GB RAM
NVIDIA GeForce GTX 950
Windows 10 Professional 64-bit
http://www.trueform.ca
CS43 cnc
Troy Hollinshead
Junior Member
Posts: 58
Joined: Wed, Apr 30 2014, 4:13PM
Company Name: Leidys Custom Woodworking
Country: UNITED STATES
Location: Mercersburg, Pennsylvania
Contact:

Re: Cutting into adjacent parts

Post by Troy Hollinshead »

Years ago when we 1st got our cnc. I had the same issue. Im not possitive since its been a while but im pretty sure I added a part clearance value and that solved my issue.
Clearance.png
Troy
Rob Davis
Guru Member
Posts: 351
Joined: Mon, May 23 2005, 5:43PM
Location: Indiana
Contact:

Re: Cutting into adjacent parts

Post by Rob Davis »

Thanks Thomas adn Troy. We've cut angled parts before without his issue but never a whole set of them all together.
We'll likely try the radius end first so we don't add extra space between every part in nest.
:beer:
Thomas strembitsky
Guru Member
Posts: 292
Joined: Fri, Jul 27 2012, 12:30PM
Company Name: true form cabinets
Country: CANADA
Contact:

Re: Cutting into adjacent parts

Post by Thomas strembitsky »

its good as a double check to go in the graph screen and double check that the cuts are going to hit after you have made you changes
Intel(R) Core(TM) i5-6400 @ 2.70GHz 8.00 GB RAM
NVIDIA GeForce GTX 950
Windows 10 Professional 64-bit
http://www.trueform.ca
CS43 cnc
Brad McIntosh
Guru Member
Posts: 559
Joined: Wed, May 18 2005, 6:59PM
Company Name: CNC Automation
Country: CANADA
Location: St. Zotique, Québec, Canada
Contact:

Re: Cutting into adjacent parts

Post by Brad McIntosh »

Rob,

Gouges caused by angle parts are really a factor based on where the intersection of the two edges projects to. If the projection leads to the exterior of the sheet or to a waste area, then you would never notice. The projection is due to the machine extrapolating the offset of the two edges to the point that they intersect. With a 90° or greater corner, this is not an issue as the intersecting point stays "close" to the part. It is only with very acute angles that the "projected" offset path moves further away - the more acute the angle, the further away the intersection point.

The control can't/won't/shouldn't add any entities to circumvent this. As my post back many years ago (2011) may have alluded to - the very, very small radius that one can add to any acute, exterior angles introduces an tiny, imperceptible, extra arc entity in the resultant tool path. This extra arc then allows the tool to virtually pivot around the sharp corner and not delve into other parts.
Brad McIntosh
CNC Automation

Home: http://www.cncautomation.com
Twitter: @bmcncautomation
Post Reply