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The recommendation is in principle ok, because different materials have different pressure temperatures and there can always be a rest in the nozzle.
But if you clean the PrintCore regularly or after every change from one type of material to another, i.e. with hot/cold pulls, then I don't see any problem.
I don't use dedicated PrintCores and also don't do a Hot/Cold Pull very often and don't have any problems with it. But that doesn't mean that this is the correct way. I think this is rather a question of faith how to handle it. With dedicated PrintCores for every kind of material you certainly don't do anything wrong, if it's really necessary, I can't say, but I personally haven't noticed any disadvantages after one year.
When a nozzle is worn out, you can see from the print quality, as the nozzle no longer has the intended diameter and has become wider. So far (1 year) I haven't seen any wear on my PrintCores.
First of all PLA and TPLA are 99.99% the same thing as far as I'm concerned. It's like water versus water with food coloring. They have very similar temperature characteristics, same melting point, same softening point, they act the same in almost every way except the TPLA is slightly more flexible and slightly weaker. This makes it quite a bit tougher. So definitely one core for both of those is fine.
So I swap between nylon and pla with the same core all the time. I already swapped twice today. It's really not a big deal. When I switch to PLA however I don't tell the printer that it's not nylon right away - just slide out the nylon, slide in the pla, then do "move material" and wait until all the nylon seems to be gone. Only then do I select "pla" as the "current" material. I do this because I feel you need the higher temp to get most of the nylon out of the nozzle.
I don't print much TPU so I can't really speak to that but changing cores all the time seems a bit silly. I have used the same core for maybe 8 different materials including PP, ABS, PLA, TPU, Nylon, CPE
As far as I can tell the cores last forever. I've had a few cores that I've used for I think about 2 years now? They are build very well and will probably never wear out - they just might snap at the heatbreak some day - other than that I expect them to last years.
Thanks for the information. Ae will stick witht he print cores we have at present and keep them cleam. A couple of spare print cores in the drawer just in case.
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In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
So what’s new?
The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
The UltiMaker S7 also includes quality of life improvements:
Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more
Curious to see the S7 in action?
We’re hosting a free tech demo on February 7.
It will be live and you can ask any questions to our CTO, Miguel Calvo.
Register here for the Webinar
Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.
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Smithy 1,135
The recommendation is in principle ok, because different materials have different pressure temperatures and there can always be a rest in the nozzle.
But if you clean the PrintCore regularly or after every change from one type of material to another, i.e. with hot/cold pulls, then I don't see any problem.
I don't use dedicated PrintCores and also don't do a Hot/Cold Pull very often and don't have any problems with it. But that doesn't mean that this is the correct way. I think this is rather a question of faith how to handle it. With dedicated PrintCores for every kind of material you certainly don't do anything wrong, if it's really necessary, I can't say, but I personally haven't noticed any disadvantages after one year.
When a nozzle is worn out, you can see from the print quality, as the nozzle no longer has the intended diameter and has become wider. So far (1 year) I haven't seen any wear on my PrintCores.
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gr5 2,002
First of all PLA and TPLA are 99.99% the same thing as far as I'm concerned. It's like water versus water with food coloring. They have very similar temperature characteristics, same melting point, same softening point, they act the same in almost every way except the TPLA is slightly more flexible and slightly weaker. This makes it quite a bit tougher. So definitely one core for both of those is fine.
So I swap between nylon and pla with the same core all the time. I already swapped twice today. It's really not a big deal. When I switch to PLA however I don't tell the printer that it's not nylon right away - just slide out the nylon, slide in the pla, then do "move material" and wait until all the nylon seems to be gone. Only then do I select "pla" as the "current" material. I do this because I feel you need the higher temp to get most of the nylon out of the nozzle.
I don't print much TPU so I can't really speak to that but changing cores all the time seems a bit silly. I have used the same core for maybe 8 different materials including PP, ABS, PLA, TPU, Nylon, CPE
As far as I can tell the cores last forever. I've had a few cores that I've used for I think about 2 years now? They are build very well and will probably never wear out - they just might snap at the heatbreak some day - other than that I expect them to last years.
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John_Mag 0
Thanks for the information. Ae will stick witht he print cores we have at present and keep them cleam. A couple of spare print cores in the drawer just in case.
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