Roland cutter knife prototype for CNC machine!
Roland cutter knife holder for CNC
|Amazing first cuts done in ordinary A4 paper!|
I started looking on the internet for setups for drag knifes but found them quite expensive. Not a problem if you really have something you need it for - but I could not justify it for playing around....so I started looking on aliexpress - and that's where I came across Roland cutters. They where so cheap - 7USD for a knife holder and 15 knives - wow!
So then the research began. I understood quite early that I needed a spring setup - you will never have a 100% flat surface for the cutter to operate on, and just microscopic variations would ruin the result and could also break something. I designed the roland cutter holder in Onshape, you can find the parts here: Roland Cutter Holder - Onshape
The orange part is meant to be used for spring tensioning, but I did not use this in the first testing, it seemed to work quite good with no adjustments 😊
You will need
- 8mm rod
- 2x LM8UU bearings
- 2x Springs
- Some plywood (I also made a 3d printed version, but havent tested it yet)
- A strip to hold the cutter
- The roland cutter. I bought this - 7USD - crazy!! Ali Roland Cutter!
Below is a video that shows how the cutter would flex. You see the rod also moving in the video, it is supposed to be a plate on the top locking it, as you can see from the CAD drawing... I just didn't have time to put it on, too eager to test the tool!
As for CAM setup I made a tool with 0.1mm diameter and with feedrate of 600mm/minute. I then defined the cutouts with 0.1mm depth (since the knife is already plunged into the material at z=0).
I showed my wife the initial results and instantly got my first product order - Cutouts of cat profiles to use in the kindergarden she works in!
|First order - cat profiles!|
Here is a video of the first cut of a snowflake (I use Estlcam as controller AND cam).
Batman logo in the making
If you have any questions or ideas for improvements please let me know :D