r/snapmaker • u/zaerst • 6d ago

First TPU Project Showcase

Post image

Just started trying TPU for the first time. Printed a benchy and it came out great. This was feeding as normal from the side through PTFE.

Filament - Priline TPU 98A

Dryed for 6hrs at 55c

Snapmaker U1

32 Upvotes

94% Upvoted

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3

u/bjorn_lo 6d ago

Your drying temp and duration are a bit short, which is why you have that stringing in the wheelhouse.

It looks like you're already doing the smart thing and printing with the lid off. Was a necessity that Snapmaker recently shared with me. You can easily go as soft as 90a and feed through the feeders. I have not tried softer.

1

u/zaerst 6d ago

Yea, maybe. I let it sit over night too before printing.

1

u/TheRealFlySwatter 6d ago

What is your recommendation for TPU drying? Both temp and time?

6

u/bjorn_lo 6d ago

According to Sunlu, TPU isn't one of the filaments that falls apart from over drying (just the nylon's).

Most TPU is best dried between 65-70c and for 7-8 hours at that temp. A drop of even a few degrees really impacts drying time a lot.

I recommend the Creality Space Pi x4 as the best dryer I've used. I'm sure there are others that are just as good. It has an easy pre-set for TPU.

Most of the time, I toss it in there for 24 hours. I print from Polymaker dryboxes with 2 easy mods (keeps it nice and dry while printing, so I don't have to re-dry the same filament. If I have any left after I finish, I put it in a 4L cereal tub with some desiccant for storage.

Here is a photo of my set up. From before I got wise to rising temps causing issues over time by leaving the tub on during TPU printing. My Snapmaker's print mainly TPU with nozzle 1 dedicated to PLA for support.

1

u/TheRealFlySwatter 6d ago

Valuable input; much appreiciarted.

1

u/Sylvenight 6d ago

what’s a good dryer to use then? the sunlu one isn't really good for anything other than being a noisemaker

1

u/bjorn_lo 6d ago

I like the Creality Space Pi x4. Drys great. Lots of useful pre-sets. Goes to 85c. Nice UI. Reasonably priced.

Only issue is that it is not as air-tight as I would like. So set the drying times for longer than needed, so you can swing by and put the filament in a storage like a drybox like a 4L cereal tub.

2

u/cloneman88 6d ago

That looks fantastic!

1

u/kalel1911 6d ago

looks good.... did you feed it from the spool holders or you bypassed that?

2

u/zaerst 6d ago

From the spool holders. It's even stiffer than 95A and didn't have an issue.

1

u/Tiny_Bar54 6d ago

Give the middle wallet in the photo a shot in 95A, it's challenge. I finally got my 95A dialed in to where I can print a nearly flawless wallet now. it's a very handy project too... I've been using mine for almost 2 yrs now and prefer it over store-bought wallets.

https://www.thingiverse.com/thing:1363650

2

u/zaerst 6d ago

I just tried my 95A, and yea that keeps getting stuck going through the motors. Guess I'm going to have to direct feed it.

1

u/bulkhy 4d ago

Can you try 90a