Trim your own portafilter paper filters with this 3D printed cutter - Page 2
FWIW, my filament cost estimate for the base is less than $0.50, so consolidating multiple sizes into a single base would mainly reduce clutter. I like the notion of keeping the groove as narrow as possible to mitigate the paper warping under the blade and altering the cut size. Adding just a second groove could accommodate cutting disks for the top and bottom of the puck. For example, the disks I use are 55mm and 59mm for a VST 18g ridge-less basket.
Here is a "multi-base" with 1mm* channels for all filter sizes notched into one base. I am skeptical that this will work - or will work as well as the individually sized bases - but I'd love to be proven wrong. If you try this, please report back. TIA.
https://drive.google.com/file/d/1xABhBl ... sp=sharing
*original bases have 1.5mm channels
https://drive.google.com/file/d/1xABhBl ... sp=sharing
*original bases have 1.5mm channels
This is really cool! Great work!
I was considering making something like this, but hadn't got around to it yet.
Could it be modified to cut chemex filters to aeropress filter size? I really dislike the aeropress filters.
I was considering making something like this, but hadn't got around to it yet.
Could it be modified to cut chemex filters to aeropress filter size? I really dislike the aeropress filters.
Thanks for the kind words. Currently this only works with AeroPress filters. There seem to be a couple of options out there for fans of Chemex filters: Good Brothers sells them pre-cut and Amazon and Michaels sells circle cutters that most people try with Chemex or similar filters. Also, I have LOTS of AP filters and zero Chemex. 

All good. Still a super cool design.
I have the good brothers filters, was just looking for a cheaper option.
I have the good brothers filters, was just looking for a cheaper option.
I have one of those cutters from Amazon. It took a few returns to get an actual good one but can confirm it works very well for Chemex filters.
I made about 500 in a batch and haven't made another batch yet.
That said, I feel like this approach would be infinitely better based on the video alone.
I made about 500 in a batch and haven't made another batch yet.
That said, I feel like this approach would be infinitely better based on the video alone.
You convinced me, and I am considering buying one, but the question is: would a cheap (€30ish) 3D printer do a job like this, or is something more sophisticated required?michang5 wrote:If you don't have access to a 3D printer, consider buying from them.
Sometimes one wanders through hardware stores and online shops to look for a simple stupid object that is, yet, hard to find. A 3D printer, I suspect, would simplify life.
I do not know. I purchased a Prusa printer for my first. They are known to be among the most reliable, but they charge a premium. Cheaper ones seem to require more modding and futzing.
I printed one last night on my Prusa MK3S+ using Hatchbox PETG.
It printed without issue and I used brand new Exacto brand blades.
The first three filters I cut stacked, were almost perfect. The last few cuts I attempted tore the filters.
I have tried to get good cuts using various pressures, speeds, etc. No joy. It just keep tearing the filters.
I tried official Aeropress filters as well as generic non-bleached filters I bought from Amazon.
Not sure what I am doing wrong.
It printed without issue and I used brand new Exacto brand blades.
The first three filters I cut stacked, were almost perfect. The last few cuts I attempted tore the filters.
I have tried to get good cuts using various pressures, speeds, etc. No joy. It just keep tearing the filters.
I tried official Aeropress filters as well as generic non-bleached filters I bought from Amazon.
Not sure what I am doing wrong.
I think I know where i went wrong. I used m3 nuts that were too "thick" and this caused a bulge in the side where the blades mount pushing them "off axis". I reprinted the main body and I'm waiting for the correct nuts to arrive tomorrow. I will report back.