Small challenge. I am pretty happy with how my latest prototype printer performes, so i decided to get disillusioned :) This is the part i am printing [attachment 89830 DSCN1913small.JPG] It is printed from TPU with a layer height of 0.2mm, using a 0.3 nozzle and 60% infill. 3 top and bottom solid layers and 4 perimeter shells make this pretty solid though. Print time was 45 minutes. Let me add that layer adhesion is pretty much perfect. If you like a challenge please download the zipped STL and print it with any flexible material you have laying around and post your result. Mine is far from perfect so i expect to see better results than this, the question though is, what does it take to be better and how large are the differences? Please don't take this to seriously, i expect it to be a learning eyperience for all involved since printing flexible materials is always a challenge. Good luck Björn https://reprap.org/forum/read.php?1,744132,744132#msg-744132 Mon, 14 Sep 2026 23:08:36 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,744132,744302#msg-744302 https://reprap.org/forum/read.php?1,744132,744302#msg-744302
I did use light cooling (8-20% based on time), layer adhesion is excellent. Never had a problem with it. Upping the temperature and using extrusion widths of wider than the nozzle size take care of that easily.

Print duration was half an hour give or take, I wasn't timing it. I was printing sloooowww... 12mm/s.

To improve stringing, the best strategy I've found is to speed up travel moves, I use whatever my printer can do, I think it's about 150 mm/s.

Your layer registration is better than mine, perhaps the difference between TPU and TPE might account for some of that.]]> nebbian General Wed, 01 Feb 2017 10:05:45 -0500 https://reprap.org/forum/read.php?1,744132,744297#msg-744297 https://reprap.org/forum/read.php?1,744132,744297#msg-744297 The stringing looks a good deal better than for me.
Did you use part cooling with the TPE? I had very mixed results from superior surface down to nearly non existent layer adhesion.
How long did the print take?
It looks a bit as if the model is scaled in z direction, the model should be 20mm in height.]]> Srek General Wed, 01 Feb 2017 09:53:19 -0500 https://reprap.org/forum/read.php?1,744132,744296#msg-744296 https://reprap.org/forum/read.php?1,744132,744296#msg-744296
[attachment 89853 IMG_6415.jpg]

[attachment 89854 IMG_6416.jpg]

Settings similar to yours, layer height of 0.2mm, 0.3 nozzle and it doesn't matter what the infill is, as it's always drawing either perimeters or top and bottom shells.
It will always be tricky to get nice sharp edges on a very thin tower, but these ones are OK I guess.

I did cut the model down a bit so that it wasn't using as much filament and time. I think that 9 points are enough to see what's going on.

The model needed a bit of cleaning up, it had a lot of bad faces so I ran it through Netfabb before chopping it up. I've attached the model I used.]]> nebbian General Wed, 01 Feb 2017 09:47:44 -0500 https://reprap.org/forum/read.php?1,744132,744132#msg-744132 https://reprap.org/forum/read.php?1,744132,744132#msg-744132 I am pretty happy with how my latest prototype printer performes, so i decided to get disillusioned :)
This is the part i am printing
[attachment 89830 DSCN1913small.JPG]
It is printed from TPU with a layer height of 0.2mm, using a 0.3 nozzle and 60% infill. 3 top and bottom solid layers and 4 perimeter shells make this pretty solid though.
Print time was 45 minutes. Let me add that layer adhesion is pretty much perfect.
If you like a challenge please download the zipped STL and print it with any flexible material you have laying around and post your result.
Mine is far from perfect so i expect to see better results than this, the question though is, what does it take to be better and how large are the differences?
Please don't take this to seriously, i expect it to be a learning eyperience for all involved since printing flexible materials is always a challenge.
Good luck
Björn]]> Srek General Tue, 31 Jan 2017 17:24:33 -0500