12-06-2012, 11:52 AM | #1 |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
| CNC Drag Knife
This may not be of use to many, but I thought someone might find it interesting. I've wanted a CNC Drag Knife for quite awhile. I figured it would come in handy for cutting thin plastic and paint masks on my mill. Most I've seen are in the $100 range, and the replacement blades are about $15. Then I found this website and thought this was just what I wanted. Something a bit heavier for cutting thicker materials with an inexpensive blade: Drag Knifer for CNC routerDonek Tools Unfortunately he wants $230 for one . I searched around and found this forum where someone made their own (scroll down a bit for a picture of what I found for inspiration): Vectric Forum • View topic - Knives to cut foam core board? I fired up the Prototrak during lunch and made one for myself. I wanted the blade at 60 degrees, so mine is a bit different. I'll be trying it out over the weekend. Most are spring loaded and use ball bearings, but mine does not. I'm not worried about the spring too much, and I can unhook my motor from my spindle and it turns freely.: |
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12-06-2012, 05:29 PM | #2 |
I wanna be Dave Join Date: May 2008 Location: Baltimore
Posts: 4,442
| Re: CNC Drag Knife
so it's sorta like a plotter cutter? When I worked at Middle River Aircraft Systems, they had a CNC plotter for cutting the pre-preg carbon fiber. the cutting blade looked like a HD exacto knife. Nice work on the machining. |
12-06-2012, 07:22 PM | #3 |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
| Re: CNC Drag Knife |
12-07-2012, 11:50 AM | #4 | |
I wanna be Dave Join Date: May 2008 Location: Baltimore
Posts: 4,442
| Re: CNC Drag Knife Quote:
I've wanted to build some type of cutting rig that was based on an old drafting table, something with guides for the X and Y movement. | |
12-07-2012, 01:20 PM | #5 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: CNC Drag Knife
Whats the spindle speed on that puppy?
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12-07-2012, 01:50 PM | #6 |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
| Re: CNC Drag Knife |
12-07-2012, 01:52 PM | #7 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: CNC Drag Knife
Well that's no fun at all. That is a pretty nifty idea though. I might have to make one too. What gets placed underneath the material you are cutting? |
12-07-2012, 02:01 PM | #8 |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
| Re: CNC Drag Knife
I'll probably use a large sheet of plastic. I've seen some people use wood or laminate. As long as it's flat, it should work.
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12-07-2012, 02:02 PM | #9 |
RCC Addict Join Date: Mar 2011 Location: Katy / west houston
Posts: 1,014
| Re: CNC Drag Knife
Oh that's sweet, I used to have a sticker cutting machine that had a miniature version of yours.
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11-25-2013, 04:10 AM | #10 | |
Newbie Join Date: Nov 2013 Location: UK
Posts: 5
| Re: CNC Drag Knife Quote:
Thanks | |
04-19-2014, 07:56 PM | #11 |
Newbie Join Date: Apr 2014 Location: hackensack new jersey
Posts: 1
| Re: CNC Drag Knife |
04-19-2014, 11:53 PM | #12 |
Quarry Creeper Join Date: May 2009 Location: India
Posts: 365
| Re: CNC Drag Knife No. The knife does not have an rpm and cannot achieve the cutting mechanics of engraving. You will need this Anatomy of an Engraving Cutter |
04-20-2014, 08:02 AM | #13 | |
No idea what I'm doing Join Date: Oct 2008 Location: Underground, CO
Posts: 4,529
| Re: CNC Drag Knife Quote:
They also have spring loaded, diamond point engraving tools like this: Diamond Drag Engraving Bit for CNC Machines - Use Your CNC Machine to Engrave Metal, Plastic, Glass, and Granite - WidgetWorks Unlimited | |
04-21-2014, 03:27 AM | #14 | |
Quarry Creeper Join Date: May 2009 Location: India
Posts: 365
| Re: CNC Drag Knife Quote:
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