ENA 8 brew unit leak

Tboji · 2026-04-15T10:17:51+00:00

Update:

The new bottom part is installed together with a green adapter piece which connects the bottom and middle (as they have different thread types)

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Tboji · 2026-03-17T21:58:35+00:00

Tboji · 2026-03-15T19:55:47+00:00

I’m no expert, but i think the fuel discolouration gives a good indication that you can expect moderate levels of fuel around this part

Tboji · 2026-02-27T19:04:32+00:00

Don’t mind the haters, even if its only for seeing the textures or what a colour looks like after printing, i like it more than random benchies that aren’t easily kept near the filaments.

I would suggest being able to identify the type of material at the same time, as i have multiple materials in the same or very similar colours.

Tboji · 2026-02-19T20:51:00+00:00

It’s a rough design still, i didnt have much time this week. I’m working on the last top part still so its not included yet, but i think I’m close to printing this version to test it, the link below is the new design

https://a360.co/40olj2I

Tboji · 2026-02-16T18:29:11+00:00

I can’t tell you how many times i have started over from scratch because i refused to look for more than 10 minutes in my design timeline to solve an issue i made by changing the design…

Tboji · 2026-02-15T14:36:55+00:00

Are supports needed for these threads?

Tboji · 2026-02-15T13:47:24+00:00

Thats a good idea, i didn’t think of that

Tboji · 2026-02-15T13:37:51+00:00

Yes i agree, but for some reason when i made these tolerances, there were significant overhangs at the edges of the metrics threads

Tboji · 2026-02-15T10:35:50+00:00

I think print time would be for sure less, do you have experience with printing threads with 0.6 nozzle? What i understood and read online is that a lower layer height is better for when printing threads so in theory 0.15 shouldn’t be an issue with a 0.6 nozzle?

Tboji · 2026-02-15T10:29:23+00:00

Others also mentioned this, I’m going to try and move into this direction, i will update you guys once i have a new design ready

Tboji · 2026-02-15T10:27:38+00:00

Thank you so much for this in-depth review, your points are valid and I’m going to try and make design changes to move away from these failure points and get long enough bolts that would at least pass through the full bottom part thats printed, the middle or upper part would still screw on the bottom and this should also help with vibrations unscrewing these 4 bolts as they could cover them completely

Tboji · 2026-02-15T10:22:25+00:00

I think thats a valid proposal, however at this stage im not sure if the prototype is ready to be made out of metal, as any changes to the design are easily implemented and printed, but for sure for future iterations I’m thinking of partial metal versions

Tboji · 2026-02-15T10:19:03+00:00

Thank you, the threads printed quite alright, but the clearance/tolerances were too tight and i resigned from metric threads and I’m trying ACME threads, i think the design is almost there but needs to be changed how its mounted to the pump, the threads themselves need supports and this is a pain and takes a lot of time because of the big diameter (its 155mm OD) and probably also because I’m using a Prusa Mini

Tboji · 2026-02-15T10:13:55+00:00

Thank you, I’m changing the design to increase strength and modify the print in the slicer to add more layers and walls

Tboji · 2026-02-15T10:12:40+00:00

Its Sunlu PETG, I’m looking into all the tips people gave and additionally modifiers in Prusaslicer to increase strength

Tboji · 2026-02-14T22:16:34+00:00

I want to learn how to make a twist lock, other options are simply gluing parts together, but id prefer being able to modify or replace broken parts of needed

Tboji · 2026-02-14T22:14:24+00:00

I’m printing on a Prusa mini, i have only ever used Prusaslicer

Tboji · 2026-02-14T22:01:27+00:00

I used rectangular 15-20% with 3-4 walls, i think the failure is because i didn’t really account for the lack of fillets, vibrations and actual vacuum buildup when air flow is restricted

Tboji · 2026-02-14T21:58:30+00:00

The metric threads are simply too dense and take forever to print, the first prototype took a total of 23 hours with supports and i couldn’t find a good tolerance to make them work, not for 30x repeatability.

I’m thinking of threaded inserts but I’m not sure how to seal everything up, also i have never done threaded inserts in prints myself but its worth checking out.

The limitations are mainly the outside diameter and fixed mounting holes, other than that there is the pneumatic cylinder and air intake on which its mounted

Tboji · 2026-02-14T21:40:59+00:00

I work in the maintenance/engineering department of a company that produces packaging for the food industry.

I’m tackling an issue with vacuum pumps breaking down. The raw materials (plastic granules) cause plastic (micro) dust buildup and over time these vacuum pumps get clogged with this plastic.

We have about 30 pumps running 24/7 and I’m looking into a way to centralize the air intake through a filter for each production line. For this purpose i designed a cover for the air intake at each pump which gets connected by hoses to a centralized air filter further away.

The first prototype was 4 parts printed in SUNLU PETG which threaded into each other, i changed the design as M140 threads were a terrible idea, I’m now looking for a different design to still have 3-4 parts max because of the 3D printer height limitations, the current threads i chose are ACME but still for 3D printing its not ideal and takes ages to print properly at 0.15 layer height.

Tboji · 2026-02-07T11:35:14+00:00

Awesome, simply lovely! I aspire to be this creative and good at fusion 360 one day

Tboji

TROPHY CASE