MK3 to MK3S upgrade cooling issues
A few may remember I mentioned cooling issues directly after I updated a mk3 to a mk3s. Petg and tpu prints were failing that were printing successfully before upgrading. I traced the issue to the new extruders print fan position/parts and it's substantially improved cooling capability.
Before the upgrade I could select the generic filament settings in prusa slicer, create g.code and print successfully almost consistently, but after upgrading to the mk3s almost every print would fail. This applies to newly sliced models in prusa slicer using Prusa's supplied print settings and to all previously created mk3 g.code files or g.code files downloaded from the prusa printer community. Watching prints fail time and time again isn't much fun and so I started creating new printer settings for every single filament type, generally reducing fan speed drastically to prevent warping and print-ruining blockages.
Given my own experience I think prusa should have provided updated filament printer settings for prusa slicer rather than expecting users to use the original mk3 versions. But I haven't noticed much mention of the issues I've experienced and it just got me wondering how many other people have experienced the same after upgrading their own mk3? Anyone here had a similar experience?
RE: MK3 to MK3S upgrade cooling issues
I'll admit I'm surprised no-one else has seemingly experienced any issues with the standard mk3 print settings. I had wanted to learn what changes other owners had implemented since updating, but I'm really pleased the mk3 settings appear to be working out well for all others that upgraded.
With the craziness that is the coronavirus and the UK on effective lock down I'll have plenty time to finish dialing in custom settings over the next few weeks. Great to have the prusa to pass the time and give something to do. Hope everyone is well and staying safe out there. 🙂
RE: MK3 to MK3S upgrade cooling issues
I assume you don't have the blue silicone sock on your heater block?
RE: MK3 to MK3S upgrade cooling issues
@torbjorn-j3
No, I haven't fitted one. Do you reckon it's a necessary modification for the mk3s?
RE: MK3 to MK3S upgrade cooling issues
@torbjorn-j3
Many thanks for the heads up. I was pretty much sleep walking when I read your post last night so I had a look at silicon socks this morning and it appears it'll solve thermal issues I've been experiencing.
Feel like I should have known about these socks. 3D printing's a great hobby - there's always more to learn. Just when I think I'm starting to master most the tools in the box I'm suddenly left feeling like a bit of a spanner! 🤣
Cheers. 🙂 E3D Silicon sock on order and looking forward to testing it out.
RE: MK3 to MK3S upgrade cooling issues
Having it definitely helps with cooling problems and keeps the temperature on your hotend more stable.
Before i got one i had all kinds of problems especially with first or second layer when fan comes on.
PETG outer border did not stick due to temperature drop of 5 or more degrees when fan started and then it printed probably first outer perimeter or so with too low temp causing that part of the object to easily peel off.
Also bridging on flexible materials where by default you get cooling fan to come on caused "hotend themral runaway" and aborted prints.
All this was solved once i added the silicon sock.