Notifications
Clear all

20 Micron Layers  

  RSS
evan38109
(@evan38109)
Eminent Member
20 Micron Layers

Anyone else trying out 0.02mm layer heights?

Model is Kijai's Forbidden Watchtower at 50%. Printed using E3D's 0.15mm nozzle on my MK3S with the following modifications:

  • Misumi linear bearings and rods
  • 0.9° Moons MS17HA2P4100 X & Y Steppers
  • BNBSX Extruder with 1.8° Moons MS17HD5P4070
  • Slice Mosquito Hotend (because I wouldn't be so eager to try different nozzles without it)
  • Misumi 16T pulleys
  • Gates 20T 5mm idlers
  • A bunch of other tweaks that didn't make much of a difference

Printed with base speed at 60mm/s, with outer perimeters and solid infill trimmed to 20% and 60%, respectively. I haven't experimented thoroughly -- this is only my second 20um print -- but I hope to push that faster.

Looks like I still have some tuning to do with retraction. Funny, I didn't even see those fine strings until uploaded -- my eyes aren't that good!

Hat tip to @guy-k2, whose 0.9° degree stepper project and BNBSX extruder is a big part of this.

This topic was modified 2 years ago by evan38109
Posted : 27/07/2019 9:17 pm
Pedroid and djholm liked
Dave Avery
(@dave-avery)
Honorable Member
RE: 20 Micron Layers

Nice Job

Posted : 27/07/2019 9:45 pm
Bunny Science
(@bunny-science)
Noble Member
RE: 20 Micron Layers

Bunnies apporve! Even more impressive is when you realize that is a coin next to your print.

 

Posted : 29/07/2019 12:22 am
djholm
(@djholm)
Active Member
RE: 20 Micron Layers

Really nice, and inspirational!

I have this long term itch to try to fabricate a Curta calculator replica using mwu’s build, but at 2:1 instead of 3:1.  Maybe with enough Bunny & Bear tweaking and the 20 micron layers you’ve demonstrated that will be possible.  

Posted : 30/07/2019 3:06 pm
vintagepc
(@vintagepc)
RE: 20 Micron Layers

Can I ask how long that print took? Place your bets now! 😉

Posted : 30/07/2019 3:16 pm
Nikolai
(@nikolai)
Noble Member
RE: 20 Micron Layers

It's impressive to see, that it can work with FDM and such a high resolution. Although this tool wouldn't be my first choice for that job 🙂

Thanks for sharing.

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram...
Posted : 30/07/2019 5:58 pm
evan38109 liked
--
 --
(@)
Illustrious Member
RE: 20 Micron Layers

Well - with all those mods, I would no longer call it a Prusa Mk3 printer.  That's sort of like calling a Formula 1 Racer a Ford.

Posted : 30/07/2019 7:12 pm
evan38109
(@evan38109)
Eminent Member
Topic starter answered:
RE: 20 Micron Layers
Posted by: vintagepc

Can I ask how long that print took? Place your bets now! 😉

Great question! 21 hours, 30-ish minutes. 

...Who won the pool? 😋 

Posted by: Tim

Well - with all those mods, I would no longer call it a Prusa Mk3 printer.  That's sort of like calling a Formula 1 Racer a Ford.

Ha! Too true.

That said, after months of tweaking, I'm surprised by how relatively close the stock model is to achieving this kind of performance. In my humble experience, the vast majority of improvement comes from just three modifications:

1. Better -- lubricated! -- rods and bearings
2. 0.9° X & Y steppers
3. A geared extruder

I'd love to see one or more of those make it into the i3 MK4! 

 

Posted : 30/07/2019 10:13 pm
--
 --
(@)
Illustrious Member
RE: 20 Micron Layers

Instructions to actually clean and lubricate the bearing during installation, and a geared extruder ... the others are probably overkill for 99% of the user base. 

Posted : 30/07/2019 10:40 pm
--
 --
(@)
Illustrious Member
RE: 20 Micron Layers

So I tried the same model at 50% using my more or less stock MK3 ... only mods are E3D heatbreak and Misumi bearings when my factory bearings rolled past their expiration date (still using factory rods).  Had some stringing so I wire brushed the surface to knock off the higher spots. 

I didn't use thin wall detection so top knot is missing (it printed, but fell off as I was removing the part from the bed), and no orb fills in the large circle windows.

PLA, well used 0.40 mm brass nozzle, 0.07 mm layers. 

I may try this model at 25% using my 0.25 nozzle and 0.04 layers.  

Posted : 31/07/2019 7:22 am
--
 --
(@)
Illustrious Member
RE: 20 Micron Layers

The color version ... but being light tones it's hard to see detail.

Posted : 31/07/2019 7:28 am
Bunny Science
(@bunny-science)
Noble Member
200 micron layers

This 200 micron version in PETG is more deliciously satisfying.

Seriously, though. Evan, take a look at the BS6RHD fan shroud in the Mosquito kit. Bunnies found that high temp printing melts the nylon in the nylock nuts. Consequently, printing polycarbonate leaves the mounting screw loose despite use of a nylock.

BS6 adds an interference screw to help lock the mounting screw in place. Use a square nut and either a M3 set screw or short M3 regular screw. 

Posted : 02/08/2019 5:42 pm
evan38109 liked
evan38109
(@evan38109)
Eminent Member
Topic starter answered:
RE: 20 Micron Layers

Hahaha! Now if we can only get an MMU version that prints chocolate and peanut butter, we'll be set!

Thanks for the heads up about that nylon nut. I've mostly been printing PLA lately while I try out and tune in LA15 from your firmware, but I have a project coming up that calls for PC. It's a perfect time to print the new fan shroud first, along with the new hot fins for the Mosquito adapter you created.

Posted : 02/08/2019 11:32 pm
Share: