DIY Stencil Cutting Drag Knife Solution - Update 4!
Build your own inexpensive DIY swivel drag knife for your CNC mill.
To make your own DIY Swivel Drag Knife Cutter all you need are:
1. one .25" x .125" rare earth magnet from Amazon.com
2. one 5mm OD, 2mm ID bearing from http://www.bocabearings.com
3. one 4mm OD, 1.5mm ID bearing from http://www.bocabearings.com
4. one 3/8" x 12" brass tube from Hobby Town USA or your local hobby store
5. three Carl Goldberg 3/16" wheel collars from Hobby Town USA or local hobby store
6. one spring that slides easily down the 3/8" brass tube, has an ID > .25" and a compression force of 80-150 grams when compressed 3/16"
7. Roland replacement blades 45 or 60 degree from Ebay.com
8. A copper pipe cutter such as a Rigid Model 104.
9. A tiny amount of thin CA (Cyanoacrolate also known as Super Glue)
10. A tiny amount of Loctite 609
11. Digital calipers (very helpful)
To read the complete article go to:
http://www.buildyourtools.com/forums...rb_v=viewtopic
airnocker
Everything depends on everything else.
DIY Swivel Drag Knife - Update 5!
Quote:
Originally Posted by
airnocker
Build your own inexpensive DIY swivel drag knife for your CNC mill.
To make your own DIY Swivel Drag Knife Cutter all you need are:
1. one .25" x .125" rare earth magnet from Amazon.com
2. one 5mm OD, 2mm ID bearing from
http://www.bocabearings.com
3. one 4mm OD, 1.5mm ID bearing from
http://www.bocabearings.com
4. one 3/8" x 12" brass tube from Hobby Town USA or your local hobby store
5. three Carl Goldberg 3/16" wheel collars from Hobby Town USA or local hobby store
6. one spring that slides easily down the 3/8" brass tube, has an ID > .25" and a compression force of 80-150 grams when compressed 3/16"
7. Roland replacement blades 45 or 60 degree from Ebay.com
8. A copper pipe cutter such as a Rigid Model 104.
9. A tiny amount of thin CA (Cyanoacrolate also known as Super Glue)
10. A tiny amount of Loctite 609
11. Digital calipers (very helpful)
To read the complete article go to:
http://www.buildyourtools.com/forums...rb_v=viewtopic
airnocker
Everything depends on everything else.
There is a typing error in item #3 - the OD should read 5mm not 4mm.
Also item #5, Carl Goldberg wheel collars are not available any more but similar collars are available from Dubro or Great Planes brands. As you might have guessed I have these CG collars for a very long time.
This correction has been made in the buildyourtools.com forum as well.
I apologize for this oversight.
DIY Swivel/Drag knife - compensation
Quote:
Originally Posted by
airnocker
There is a typing error in item #3 - the OD should read 5mm not 4mm.
Also item #5, Carl Goldberg wheel collars are not available any more but similar collars are available from Dubro or Great Planes brands. As you might have guessed I have these CG collars for a very long time.
This correction has been made in the buildyourtools.com forum as well.
I apologize for this oversight.
Does anyone know of a swivel knife compensation software package/processor/library? By compensation I mean what is described here
http://www.a2mc-cnc.com/downloads/do...g%20Knives.pdf
as well as a way to specify the blade's initial plunge angle for a free-swivelling blade.
Perhaps the most useful method of compensation would be to post-process a vector file (such as svg, wmf, dxf, etc) before sending it to the cutter. This would remove the cutter vendor dependency.
We were going to tackle this ourselves but thought if one existed...
Thanks for any help. -Mike
Re: DIY Stencil Cutting Drag Knife Solution - Update 4!
There is on Bbay a drag knife holder and carbide blades (30,45,60 degree)for sell, typically for for Graphtec, and Roland Vinyl cutters. Look up CB09 holders and go from there.
Hope this will help someone.