Highly upset over changes to the MMU2.0 upgrade  

Re: Highly upset over changes to the MMU2.0 upgrade

Again, understand why this is infuriating.
I ordered this last October back when there was no such thing as an MMU2.0 to order.
After ordering and waiting, due to never ending delays, suddenly MMU2.0 is announced. We all went into panic mode because this would invalidate our order but Prusa came back and said that the very few of us with this order and time period were covered and we would get the MMU2.0 in it's place.
Then after even more months of delays of MMU2.0 development and trying to get the details, we know you need a MK2.5 or MK3 printer so I buy a complete MK3 rather than upgrading my old MK2 which has the MMU1.0 installed permanently.
And now, after being told more times than I can count your order is shipping soon, I find no it's not, and may not be what I need given I've now bought another just one, but 2 more MK3 printers, did not upgrade my MK2 to a 2.5.

So If I now cancel my order and order the full MMU2.0 kit, which is possibly the correct combination for the 2 new MK3 printers I bought earlier this year just to make this work, this puts me back of the line and won't get any MMU2.0 unit next year!!!!!!!!
I'm two steps beyond livid with Prusa Research right now.

Re: Highly upset over changes to the MMU2.0 upgrade

I too, an very upset about this...

I would be happy to have the MMu2 at 24 volts... and simply put it on my Mk3

Joan

Re: Highly upset over changes to the MMU2.0 upgrade

Sorry, I guess we have multiple topics on the same basic anger https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f53/mmu1-to-2-upgrades-delayed-again-t25262.html

Re: Highly upset over changes to the MMU2.0 upgrade

The impression I get from all of this is that someone at Prusa has made an assumption that full MMU2 kits are intended for MK3, and MMU1->MMU2 upgrade kits are intended for MK2.5. It would be great to get confirmation from Prusa that the other combinations are also fully supported.

In my case, I have a MK2S w/ MMU1 and I'm waiting patiently my MK3 full upgrade w/ MMU1->MMU2 upgrade order.

Brian

Re: Highly upset over changes to the MMU2.0 upgrade

Hi all,
the MK2.5 will still be 12V because you use the same powersupply and board. So the MMU 2.0 needs to support 12V and 24V. So there should be no problem with the MK3 and the MK2.5.

Don't PANIC
Bastian

Re: Highly upset over changes to the MMU2.0 upgrade

the MK2.5 will still be 12V because you use the same powersupply and board. So the MMU 2.0 needs to support 12V and 24V. So there should be no problem with the MK3 and the MK2.5.

We know that the MMU 2.0 "full" kit supports 12V and 24V. But we're discussing the delayed MMU V1 to V2 upgrades.

"There is a production delay for which we apologize regarding MK2 MMU to MK2.5/MK3 MMU (MM upgrades of V1 to V2), with different electronics and different voltage (12V vs 24V), there was an additional development and testing needed [...]"

Why does the V1 to V2 upgrade have different electronics than the MMU 2.0 full kit?

Why does the V1 to V2 upgrade require different voltage options than the MMU 2.0 full kit?

We need an official answer from Prusa...

Re: Highly upset over changes to the MMU2.0 upgrade

If I remember correctly, the Trinamic drivers only works properly on 24V, not on 12V. That could be the reason for different hardware.

Back when MMU 2.0 was announced it could be used on almost any printer even 3. party - just plug it in and load the filaments...

I was very surprised when I learned that the MMU 2.0 didn't had its own power supply 😮

Re: Highly upset over changes to the MMU2.0 upgrade

If I remember correctly, the Trinamic drivers only works properly on 24V, not on 12V. That could be the reason for different hardware.

The MMU V2 full kit and also the V1 to V2 upgrades are supposed to be compatible with both the MK2.5 (12V) and the MK3 (24V). If what you said was the cause for the delay, it should equally delay shipping of both the full kits and also the V1 to V2 upgrades. Since the full kits are shipping ahead of schedule and only the upgrades are delayed, something else is going on.

Re: Highly upset over changes to the MMU2.0 upgrade

What spooks me is the title of the MMU 2.0 "full" kit: Original Prusa i3 MK3 Multi Material 2.0 upgrade kit
Only in the description it says that it is compatible with the Original Prusa i3 MK2.5 and MK3 3D printers.

When I ordered the kit, it was my view that it could be moved between printers (my MK2.5 and MK3). As it appears now, the MMU device becomes a regular part of a printer and can only be (re)moved using tools.

An MMU device with its own power supply and connection with a plug would have been a better and more flexible solution.

Just my thoughts...

Re: Highly upset over changes to the MMU2.0 upgrade

We know that the MMU 2.0 "full" kit supports 12V and 24V. But we're discussing the delayed MMU V1 to V2 upgrades.

"There is a production delay for which we apologize regarding MK2 MMU to MK2.5/MK3 MMU (MM upgrades of V1 to V2), with different electronics and different voltage (12V vs 24V), there was an additional development and testing needed [...]"

Why does the V1 to V2 upgrade have different electronics than the MMU 2.0 full kit?

Why does the V1 to V2 upgrade require different voltage options than the MMU 2.0 full kit?

We need an official answer from Prusa...

Actually, the MMU 2.0 full kit does not currently work properly on the MK2.5. The MMU 2.0 full kit was initially missing a power cable for 12V and it still doesn't have firmware that supports it on the MK2.5. So anyone with the MMU 2.0 full kit and a MK2.5 doesn't have it working yet. That was all discussed in this topic: https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f53/mm-2-0-mk2-5-mk3-does-not-work-with-mk2-5-t24797.html

Because the MMU 2.0 full kit doesn't actually work properly on the MK2.5 yet, that's probably why the MMU 1.0 to 2.0 upgrade kit was delayed.

I can understand why people are upset about other people getting the MMU 2.0 full kit before people getting the MMU 1.0 to 2.0 upgrade kit, but if that upsets you, it might ease your mind a bit to know that even people with the MMU 2.0 full kit can't get it to work on their MK2.5 yet, so there's no actual point to them having it in hand right now. Those folks aren't any happier with the situation =P

Re: Highly upset over changes to the MMU2.0 upgrade

MK2.5-MMU2.0 firmware should be releasing within this week, probably within 3 days. I consistently get update from their customer support (average 5 times a day). It's seems like they will be releasing soon hopefully.

Re: Highly upset over changes to the MMU2.0 upgrade

I'm one of the customers that ordered the original MMU1.0 upgrade to MMU2.0. This upgrade has changed more times than I can count and then while checking today to see why mine hasn't shipped, I see this confusing and angering message.
There is a production delay for which we apologize regarding MK2 MMU to MK2.5/MK3 MMU (MM upgrades of V1 to V2), with different electronics and different voltage (12V vs 24V), there was an additional development and testing needed, shipping is expected to start in the second half of October. Last firmware tweaks are being implemented and final preparations and tests are being run, shipping will commence soon.

#1 Since the change from what this original upgrade was, we were told the new MMU2.0 would REQUIRE a MK2.5 or MK3 printer or upgrade. That's a 24V printer that is REQUIRED.
#2 So what the heck is this now unannounced change to a new electronics for 12V, if I was told I needed a 24V printer AKA MK3 to make it work in the first place?
#3 I'm done with the delays and poor communications of what the upgrade is, what you need to make it work and why apparently even though we were told we would be taken care of- to not cancel the order months ago- we were grandfathered in, I'm still getting jerked around. I've now bought 2 MK3 printers thinking I would run with with the MMU and one without. Now I'm finding out this upgrade paid for last October, changed more times than I can count, delayed more times than I can count may be changed again to a 12V version, further delayed and be incompatible with the 24V printers I specifically bought and ordered to work with it?

The MK2.5 is still 12V, only the MK3 is 24V.

The MMU2 presently doesn't work with the MK2.5, both the full kit and the upgrade kit. Part of the reason is that the MK2.5 is 12V and so an extra power adapter is needed to work on 12V. Another reason is that the firmware to support the MMU2 on the MK2.5 hasn't been released yet for both the full kit and the upgrade kit.

Re: Highly upset over changes to the MMU2.0 upgrade

Hi guys,
I'm very sorry about the delay. I'm aware you are waiting very long. Unfortunately, not everything went smooth. I'm not a full-time developer, so I don't know all the details. Let me just sum up, what I've experienced myself.

For example the MK2.5 MMU2 power cable, isn't something, which has everyone on stock. We needed a custom solution and some manufacturer capable of doing it in thousands. Seems easy, but most of the manufacturers are already full. I took us some time and few iterations to obtain what we needed.

Second, the pulleys and shafts for the MMU2. We've sent the drawings, obtained first batches and everything was ok. Suddenly a new batch arrived with completely different diameters.We had to repack a lot of already packed MMUs, this caused delay and he had to put a lot of effort to catch up with the schedule.

The firmware itself has reached a final stage and should be released within few days, I talked about it yesterday with the devs. Right now, our testers have it. There are already MK2.5 MMU2s running in our test lab.

The assembly manual is ready (waiting for the rest), hardware is ready, firmware needs final testing. I'm quite positive, we will ship the upgrade soon.

I will do my best to let you know about its release as soon as the firmware gets a green flag 😉

Re: Highly upset over changes to the MMU2.0 upgrade

Is this the one?

Re: Highly upset over changes to the MMU2.0 upgrade

MMU2.0 running on stealth mode on MK2.5? Will it affect the overall speed? Anyway, better than nothing.

Re: Highly upset over changes to the MMU2.0 upgrade

FW 3.4.2 released in their support page.

Re: Highly upset over changes to the MMU2.0 upgrade

Yes, MK2.5 is now ready for the MMU2. Again, sorry for the long wait. A forum post will be up within hours.

Re: Highly upset over changes to the MMU2.0 upgrade

I'm not a dev, and I don't know the Mk1 power supply load capacity, but surely a simply boost converter would handle any 12V>24V voltage increase. However, I know nothing about communication changes, if there are any. I would've thought a simple adapter would have done it... then a fairly involved firmware update.

Re: Highly upset over changes to the MMU2.0 upgrade

I'm not a dev, and I don't know the Mk1 power supply load capacity, but surely a simply boost converter would handle any 12V>24V voltage increase. However, I know nothing about communication changes, if there are any. I would've thought a simple adapter would have done it... then a fairly involved firmware update.

Only MK3 and MK2.5 supported by MMU2.0 and can’t be used on MK1, MK2 and MK2S without upgrading to MK2.5 or MK3.