New printed parts C1/R4 - MK3S/MK2.5S/MMU2S  

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

C1/R4 printed parts are COMPATIBLE ONLY with the new IR-sensor

The new Y axis parts are labeled R4, does that mean that it's only compatible with the IR-sensor? Not sure how they're related as they're on 2 completely different parts of the printer. Can I go ahead and print the Y axis parts if I'm not planning on updating to the new extruder anytime soon?

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Y-AXIS PARTS are missing from the MK3 to MK3S files as well as MMU2S buffer parts

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

we need the R4 parts using the original sensor

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

we need the R4 parts using the original sensor

I believe this is what you are looking for. (Also has the .4mm tolerance adjustment)
https://www.thingiverse.com/thing:3431164

Mad props to Martin for making this, I'm printing it now and waiting for my bearings to arrive.

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

X-carriage
At first sight, this part looks almost the same as the previous generation, but there are some changes. This x-carriage is universal for all printers MK3S/MK2.5S and MMU2S. Just for the MK2.5S variant, you need to add a small part called endstop-block to trigger mechanical endstop on the X-axis.

So, uh where is this endstop-block in the files?
I can't find the file in the mk3 to mk3s upgrade STL file package found at https://www.prusa3d.com/prusa-i3-printable-parts/
Please do let me know if i've simply missed it, as i would like to print these sooner rather than later.
Also, if that isn't an option, should I be able to re-use my existing x-carriage mount?
Thanks

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Please clarify what ...

"Also note, that due to the different extruder-body geometry the hotend tube must be shorter (45 mm), compared to the MK3/MK2.5 (50 mm)."

... actually means please?

is this the PTFE tube in the top of the hotend above the heatbreak / cavity for hotend in extruder body / hotend (metal) itself/ etc....?

Thank you.

Neil

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

I'm not a supporter of any kind, but I've already spent a ton of time looking through all the stuff around MK3S and MMU2S. Let me try to answer some questions, but don't rely 100% on them! Also I'm mainly referring to MK3 owners, I don't have experience with the MK2.5 printer.

First of all, there's different sets of printable parts for those upgrades.
On the Prusa i3 printable parts page, you might think that "Original Prusa i3 MK3 to MK3S upgrade" on the right column might be the one we're looking for, but it doesn't really include everything we want. So I recommend getting the complete "Original Prusa i3 MK3S" pack on the left column and picking out the parts we want.
Or even better: download the Original Prusa i3 MK3S github project (find the parts at Printed-Parts -> STL) because it contains the most up-to-date files. The "plug-aligner", for example, received a small change two days ago and the new version can only be found on the github project.

Second, I don't know which plastic parts exactly the MK3 to MK3S upgrade is being shipped with.
There's a list of contents on the bottom of the Prusa shop page for the upgrade, but even after choosing "Factory-printed parts" on the right, it doesn't show anything else but the fan shroud.

That's why I made my own list of printed parts including (hopefully) helpful info. You can comment on the sheet if I got anything wrong or forgot anything.

MK3S / MMU2S part list + explanations

Third, let me try to answer some of your stuff. Again, remember that I'm not official support!

The new Y axis parts are labeled R4, does that mean that it's only compatible with the IR-sensor? Not sure how they're related as they're on 2 completely different parts of the printer. Can I go ahead and print the Y axis parts if I'm not planning on updating to the new extruder anytime soon?

R4, C1 and all those letter-number-combinations are just version numbers. Because the Y-axis parts don't have anything to do with the new extruder design and the necessary holes have always been in the Y-carriage, you should be good with printing and using them. As long as you have the required nuts and screws of course. (:

Y-AXIS PARTS are missing from the MK3 to MK3S files as well as MMU2S buffer parts

I talked about this issue above. Those parts aren't really required for the upgrade. If you still want them, either download the MK3S parts or the github project - those include the Y-axis parts. You can find the links above.
The MMU2S buffer parts haven't been published yet I guess. I also can't find them anywhere.

So, uh where is this endstop-block in the files?
I can't find the file in the mk3 to mk3s upgrade STL file package found at https://www.prusa3d.com/prusa-i3-printable-parts/
Please do let me know if i've simply missed it, as i would like to print these sooner rather than later.
Also, if that isn't an option, should I be able to re-use my existing x-carriage mount?
Thanks

The original post says that the part you're looking for is just required for upgrading the MK2.5, which explains why it's not part of the MK3 to MK3S pack. Strangely, I still can't seem to find this "endstop-block" anywhere else as there's no printable-parts-pack for the MK2.5S yet. It seems like they simply forgot about that. I'm sure it will come soon though.

Please clarify what ...

"Also note, that due to the different extruder-body geometry the hotend tube must be shorter (45 mm), compared to the MK3/MK2.5 (50 mm)."

... actually means please?

is this the PTFE tube in the top of the hotend above the heatbreak / cavity for hotend in extruder body / hotend (metal) itself/ etc....?

Thank you.

Neil

Because the current PTFE tube that sticks out at the top of the heatbreak is 50mm long, I'm pretty sure they are talking about this one.

If you've got any questions, please don't hesitate to ask! I'm trying to answer as soon as possible! (:

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

ScanTraxx27,

Thank you, that makes sense - I can put my hacksaw away lol.

Cheers

Neil

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Is it still possible to make single material prints when the extruder has the MMU filament sensor configuration and the MMU2 isn't connected?
Or do I have to put the filament through the MMU2 even if I print with only one filament?

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

The new Y axis parts are labeled R4, does that mean that it's only compatible with the IR-sensor? Not sure how they're related as they're on 2 completely different parts of the printer. Can I go ahead and print the Y axis parts if I'm not planning on updating to the new extruder anytime soon?

R4, C1 and all those letter-number-combinations are just version numbers. Because the Y-axis parts don't have anything to do with the new extruder design and the necessary holes have always been in the Y-carriage, you should be good with printing and using them. As long as you have the required nuts and screws of course. (:

You're correct that they are version numbers but the Y axis parts are labeled R4. I was truly asking the question while knowing the answer. In my mind I was pointing out the error in the post without making it seem that way haha.

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

C1/R4 printed parts are COMPATIBLE ONLY with the new IR-sensor

The new Y axis parts are labeled R4, does that mean that it's only compatible with the IR-sensor? Not sure how they're related as they're on 2 completely different parts of the printer. Can I go ahead and print the Y axis parts if I'm not planning on updating to the new extruder anytime soon?

Hi dryja,
if your printer is already assembled there is no need to update the Y-axis parts. I will rephrase the sentence regarding the sensor compatibility.
---

Y-AXIS PARTS are missing from the MK3 to MK3S files as well as MMU2S buffer parts

Hi MK3BetaTester,
Nope, they aren't. The upgrade is about single material extruder, all parts are there. There is no need to print Y-axis parts and for the MMU2S will be a separate bundle.
---

we need the R4 parts using the original sensor

I can't promise this. If your printer is running now without any issues, there is no need just to change the plastic parts.
---

So, uh where is this endstop-block in the files?
I can't find the file in the mk3 to mk3s upgrade STL file package found at https://www.prusa3d.com/prusa-i3-printable-parts/
Please do let me know if i've simply missed it, as i would like to print these sooner rather than later.
Also, if that isn't an option, should I be able to re-use my existing x-carriage mount?
Thanks

Hi Drake,
MK2.5S is still undergoing final tweaks, please wait with the print. The final files will be added soon.
---

Please clarify what ...

"Also note, that due to the different extruder-body geometry the hotend tube must be shorter (45 mm), compared to the MK3/MK2.5 (50 mm)."

... actually means please?
is this the PTFE tube in the top of the hotend above the heatbreak / cavity for hotend in extruder body / hotend (metal) itself/ etc....?
Thank you.
Neil

I'm talking about the PTFE tube, which is in the hotend. We have moved the Bondtech gears closer to the hotend (shortening the distance), therefore the PTFE tube has to be shorter.
---

On the Prusa i3 printable parts page, you might think that "Original Prusa i3 MK3 to MK3S upgrade" on the right column might be the one we're looking for, but it doesn't really include everything we want.

What exactly do you think is missing from the upgrade bundle?
---

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Is it still possible to make single material prints when the extruder has the MMU filament sensor configuration and the MMU2 isn't connected?
Or do I have to put the filament through the MMU2 even if I print with only one filament?

Hi Klab,
I would recommend using the single material mode on the MMU2S. The different sensor position might be an issue, while printing with the MMU2S extruder. It can happen that you run out of the filament and you won't be able to unload the remaining part from the hotend, as it will be already under the Bondtech gears. On the MMU2S this is checked way ahead using the F.I.N.D.A. sensor.

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

On the Prusa i3 printable parts page, you might think that "Original Prusa i3 MK3 to MK3S upgrade" on the right column might be the one we're looking for, but it doesn't really include everything we want.

What exactly do you think is missing from the upgrade bundle?

Let me sort all the MK3S parts into 4 groups:

Group 1 contains all R3 or lower parts which haven't been changed, but are necessary for MK3S (Einsy-base, LCD-cover, x-end parts, ...).
Group 2 contains all R4 parts which have been updated from a previous version (extruder-idler, fan-shroud, x-carriage, ...).
Group 3 contains all new R4 parts which haven't existed before (adapter-printer, extruder-motor-plate, ...).
Group 4 contains all parts of the MK3S, which are not necessarily needed (plug-aligner, y-belt parts, ...).

Now, the MK3 to MK3S upgrade bundle "only" contains groups 2 and 3, and also only non-MMU2 parts (which isn't stated anywhere by the way - I printed all of those because I wasn't aware that MMU2 users need different parts).

But there are people (like me) who either want to print the stuff that's not needed as well, or who don't have every MK3 update since it was released. I would at least recommend to make two folders - "required" and "optional" - within the upgrade bundle and put the parts from group 4 into the latter. (:

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Hi Scan,
if your MK3 is running perfectly fine and you decide to upgrade to the MK3S, there is no need upgrade anything else than the extruder. All the other printed parts are working fine (e.g. Y-axis, ...) and changing them to a newer iteration won't bring any significant improvement. By reassembling them you are just increasing risk of damaging them. There is a golden to rule to avoid "fixing" things that aren't broken.

Also please distinguish between MK3S (single material) and MK3S MMU2S (multi material). For the single material version it doesn't make sense to print the MMU2S specific extruder parts and that is why they aren't included in the G-code/STL bundle for MK3 to MK3S. As soon as our devs tweak the last details we will release the MK3 to MK3S MMU2S and MK3S to MK3S MMU2S assembly guides, so you know exactly, what you need.

I'm sorry, if this is confusing, but our goal was to give you exactly what is needed for each type of a printer and nothing else. If you want to upgrade all the parts that have changed, regardless on whether it will change the performance of your printer, then please use the big MK3S STL bundle on our site, which contains all the parts. However, I want to stress out I don't recommend changing things just for a sake of a change.

Anyway I understand, you want to have the latest design, so I case you need help, please let me know 😉

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Hi Jakub!

First, thanks for your replies, posts and continued support! (Also props for your awesome manuals!)

I'm aware of the golden rule you're talking about. There's two reasons though why I would still choose to "fix" things that aren't broken.

The first one is about something that probably a lot of us have: the unbounded joy of assembling, disassembling and tinkering with all sorts of stuff with the goal of achieving the best possible result. Of course it's often a bad idea to disassemble something that works fine, and you have to take responsibility if something goes wrong, but the possibility of improving it and the experience you gain out of it is just worth it in my opinion!

The second and probably more reasonable thing is that my MK3 + MMU2 aren't running perfectly fine. I've got minor issues all over the place (bad first layer, issues with MMU2 spool holders / space management, printer got pretty loud over the months, ...) and I believe I can (only) fix a lot of those by completely taking apart the printer and building it up from scratch, cleaning and oiling parts and including the S upgrades. Also, I bet that very few of us DIY 3D-printer people have no problems with their printer(s) at all. There's always something that can be improved and many of us are willing to take risks to do so.

Of course those points can't be said for everyone. There's still people who just order a printer to casually use it and you guys at Prusa Research have to accomodate these people as well. So I understand your choices in this regard.
On the other hand, I, as a passionate tinkerer, haven't noticed that the MK3 to MK3S upgrade is just suitable for non-MMU2 users until reading a hand of topics here in the forums. A short explanation that more upgrade manuals and STL bundles (like MK3 to MK3S MMU2S) are yet to come would've been appropriate - a link to the according forum topic in Josef's blog update for example. (:

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

When are the openScad or STEP file going to be aviable. I need to make adjustments so the extruder works with IGUS ALUM bearings which are 16mm not 15mm. Thanks

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

When are the openScad or STEP file going to be aviable. I need to make adjustments so the extruder works with IGUS ALUM bearings which are 16mm not 15mm. Thanks

STEP and SCAD files can already be found in the MK3S github project.

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

Mark answer
Report this post
Quote

Sun Feb 24, 2019 1:40 am

mariusz.s2 wrote: ↑
Sun Feb 24, 2019 12:18 am
When are the openScad or STEP file going to be aviable. I need to make adjustments so the extruder works with IGUS ALUM bearings which are 16mm not 15mm. Thanks

STEP and SCAD files can already be found in the MK3S github project.

I see the step files , but I don't see openScad for the new files. Also the directories are not cloneable. Trying to inport the STEP files into Fusion 360 gives errors. For example importing adapter-printer-mmu2s.stp gives the following error
adapter-printer-mmu2s.stp adapter-printer-mmu2s.f3d Error Error: [adapter-printer-mmu2s.stp]: Content of the file is corrupted or invalid

Re: New printed parts C1/R4 - MK3S/MK2.5S/MMU2S

I see the step files , but I don't see openScad for the new files. Also the directories are not cloneable. Trying to inport the STEP files into Fusion 360 gives errors. For example importing adapter-printer-mmu2s.stp gives the following error
adapter-printer-mmu2s.stp adapter-printer-mmu2s.f3d Error Error: [adapter-printer-mmu2s.stp]: Content of the file is corrupted or invalid

You'll have to download the whole MK3S project. As soon as you click my link you can download it by clicking the green "Clone or download" button and then "Download ZIP".
Opening any STEP files from the project using File -> Open in Fusion360 works perfectly fine for me.

Let me know if you get it to work or not. (: