What are the external dimensions and weight of the Prusa i3 MK3?  

RE: What are the external dimensions and weight of the Prusa i3 MK3?

chassis dimensions or working volume dimensions?   they are different because the X and heatbed cables hang outside of the chassis.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Not the build volume but the physical 3D space that the printer (including filaments spool holder) will occupy.  If I add the new spool holder that can accomodate four different spool of filaments, how much extra height will it take?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Are you building an enclosure?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

560(D)x500(W)x380(H)mm without the spool holder.

The addition of the spool holder and spool is moot if you are talking about adding a different holder as it could be more or less than the factory option depending on it's configuration.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Thanks. Do you know how much more height will adding the Original Prusa i3 MK2.5S/MK3S Multi Material 2S upgrade kit (MMU2S) take?

Besides checking physical space in my room, I am also trying to decide if there is any suitable enclosure that I can get from IKEA or Home Depot to contain the printer and the fume. Shall I multiple each dimension by 10 or 20%?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Plan on a 600mm height with the MMU added to give the MMU -> extruder PTFE room. Since the tube and filament inside will flex you can get away with less, but with the MMU more room is better.

There is a recent post on Prusa's blog about mods for the Lack enclosure to support the MMU2S. So you can start there.

My advice is to forget about an enclosure until you have used the printer with the MMU for awhile. The MMU2 can be a finicky thing, especially getting started. This means that you are going to need to be able to easily access it from as many angles as possible to deal with it's various states of unhappiness. 

Like you I sought the dimensions prior to even having my printer yet and intended to build an enclosure before I got my MMU. I never got around to it and I'm glad I didn't. If I had to have keep pulling the printer in and out of an enclosure I would have destroyed it all out of frustration.

Get your printer and MMU. Set them up in the open (use a box over it to limit draft or pet issues if needed) and get them working. Print with them as is for awhile so you can best understand how to make them (the MMU specifically) play nice in your environment. Then using the knowledge that you gain during that time, look into a proper enclosure solution.

Me? I want my enclosure to have a door on the side as well as the front. The lifting top idea for Prusa's Lack mod could be useful too.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Thanks. I am living in an apartment and my bedroom is small. As we know, it is not good for health to print ABS in a bedroom with poor ventilation. However, although some mentioned that printing PLA is safe, there are not enough long-term medical and scientific studies on the effect of 3D printer on health. Besides enclosure, I am also considering to put the printer in my bedroom but when I use it, move it to the bathroom, have the door closed and ventilation on to suck out those nano particles. In that case, I need to DIY a mobile platform and check if I can move the printer into the bathroom.

BTW, is the MMU2 mature enough to use? If I don't need multi-color and solvable support at the time being but I may use them later, shall I wait for later versions or just buy the MMU2 with the printer? I recall reading that the filament sensor of the printer (andMMU2?) had issues when transparent filament was used. Have they fixed the problem?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

If you don't need the MMU and don't have time/interest in futzing with it, wait until one of those is not true. 

Once you get it working it's pretty solid, but it is much more hobbyist focused than the printer itself. Even when working well, it will need attention from time to time. 

Additionally a lot of it's worth is based on what you are printing. Other than using alternate support and infill materials, models have to be designed for multi-material printing. Breaking up a normal model is possible, but the degree of difficulty depends on the model in question.

The MMU is a lot of fun and can do some cool things, but it does take more effort that simply slicing an STL, loading the filament, and printing. 

These are all things I wish I knew ahead of time, but even with the 6 months I waited for my MMU I'm still glad I did it. 

RE: What are the external dimensions and weight of the Prusa i3 MK3?

As far as transparent filament, that was an issue with the MK3 laser sensor and not isolated to the MMU. They replaced it with an IR sensor in the MK3S which is indirectly tripped by an arm that moves when filament is present. 

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Thanks. By MMU, do you mean MMU2s: https://shop.prusa3d.com/en/upgrades/183-original-prusa-i3-mk25smk3s-multi-material-2s-upgrade-kit-mmu2s.html# ?

I don't know their products well. I think MMU2s is for the latest "Original Prusa i3 MK3S kit". Please correct me if I am wrong.

What else should I order at the same time? Is it recommended to also buy a few build plates (e.g. smooth PEI, powder-coated texture) and noozles in case of clogging? When I was using the Stratasys uPrint, I had to change the build plate often as it lost adhesiveness after being used for three times. In general, how many runs can I use the build plates before I need to change to a new one?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Posted by: peter.c20

Thanks. By MMU, do you mean MMU2s: https://shop.prusa3d.com/en/upgrades/183-original-prusa-i3-mk25smk3s-multi-material-2s-upgrade-kit-mmu2s.html# ?

I don't know their products well. I think MMU2s is for the latest "Original Prusa i3 MK3S kit". Please correct me if I am wrong.

Yes I'm sloppy and refer to the MMU2 as the MMU. The MMU was their first unit which had 4 bowden filaments being fed into a manifold. The MMU2 is for the MK3, MK2.5, and their S variants (maybe works with the MK2 as well, not sure). The only physical difference between the MMU2 and MMU2S is the addition of the filament buffer.

What else should I order at the same time? Is it recommended to also buy a few build plates (e.g. smooth PEI, powder-coated texture) and noozles in case of clogging? When I was using the Stratasys uPrint, I had to change the build plate often as it lost adhesiveness after being used for three times. In general, how many runs can I use the build plates before I need to change to a new one?

I ordered my printer with 2 extra rolls of filament and a selection of nozzles (.25, and extra .4, and a .5). I've only used the .25 once so far (since Dec) and have never used the .5. I changed my nozzle when I rebuilt my extruder for the S upgrade, but I don't think I really needed to as the jam issues weren't it's fault.

As long as you take care of the PEI sheet properly, it should last you awhile. They sent me a second sheet as my original arrived damaged. It's not damaged enough in the print area to matter, so I've been printing on it since day 1. It has probably 3000 hours of PLA printing on one side and maybe 200 hours of PETG printing on the other. Still having no adhesion issues so my second sheet is still stored away.

Many like the Powder Coated sheet due to the texture and it takes less prep for PETG, but I haven't felt any burning desire to get one now that they are finally available more readily.

Taking care of the smooth PEI sheet is easy:

1. NEVER touch the build area with your bare hands.
2. Wash it with dish soap (no additives for scents or hand care).
3. Dry it with a lint free towel.
4. Put it on the printer.
5. Pour a 5-10cm puddle of 100% acetone on it (again no scents or anything, just pure acetone)
6. Spread it and wipe it down with a lint free towel. Don't be afraid to apply some pressure.
7. Pour a 5-10cm puddle of 91% or better IPA (rubbing alcohol) and wipe it down the same way with a fresh towel.
8. Print PLA with no further prep.

I recommend the acetone wipe before your first print for best results, after that you only need to do it when you start having adhesion issues and soap/water and IPA aren't helping. I do the wipe down with IPA before every print, but some do it after 5-10 prints. Just do what works best for you.

PETG usually just needs a spritz of Windex before printing. (I don't print ABS so I can't speak to that).

It's generally best practice to print different materials on different sides/plates as they can leave hard to clean residues that impact the adhesion of other materials (e.g. trying to print PLA after printing PETG will require a good cleaning first).

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Thanks. Good to hear that the PEI sheet can be used on both sides. How come I cannot find it and the Powder Coated sheet in the online store?

For PLA, ABS, PETG and solvable support, which nozzle size do you recommend? Are you talking about getting spared E3D V6 Noozle? I think the PRUSA i3 MK3S Kit comes with a 0.4mm nozzle already.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Posted by: peter.c20

Thanks. Good to hear that the PEI sheet can be used on both sides. How come I cannot find it and the Powder Coated sheet in the online store?

They are in the Spare Parts section. I know you have to be logged in to the store at a minimum, but I think you have to have already purchased a printer too which is kinda silly.

You can select it as an option when ordering the printer tough.

For PLA, ABS, PETG and solvable support, which nozzle size do you recommend? Are you talking about getting spared E3D V6 Noozle? I think the PRUSA i3 MK3S Kit comes with a 0.4mm nozzle already.

Yes Prusa sells e3d nozzles. Yes it comes with a single .4.

As far as which one, that depends on you and what you are going to print. A .25 gives great details, but it is SLOW. The .4 is pretty much the standard and is pretty flexible with .05mm (detail) to .3mm (speed) layer heights. A .5 or .6 will let you print even faster, but less detail will be possible.

Remember that it's a single extruder printer (the MMU just feeds different filaments to the same extruder) so a different nozzle for support isn't possible.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Thanks. I cannot see the Spare Parts section nor has it as an option when ordering the printer. Strange...

RE: What are the external dimensions and weight of the Prusa i3 MK3?

spare parts is only enabled after you have placed a printer order, you can place an order , then when they enable access to the customer area you can place your spares order , after that if the printer has not shipped a chat with support can combine the orders

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Posted by: david.a66

spare parts is only enabled after you have placed a printer order, you can place an order , then when they enable access to the customer area you can place your spares order , after that if the printer has not shipped a chat with support can combine the orders

I ordered the printer but spare parts still do not show up.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

I guess they don't want to help people that aren't buying a printer, but that they hide the parts is obnoxious.

RE: What are the external dimensions and weight of the Prusa i3 MK3?

Even more obnoxious is that even I have purchased the printer, spare parts still does not show up! I think somebody mentioned that the printer has to be in shipped/delivered status before spare parts show up?

RE: What are the external dimensions and weight of the Prusa i3 MK3?

you can probably chat with support and get access turned on immediatly