RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
I’ve been really interested in a high temp option for the Core, and I was hoping that Prusa was going to offer one. I have a Core kit on order. I’ve just perused the thread, thoughts on starting with a virgin kit? Would an MMU3 be viable? High temp CF/GF filled interior and some kind of colored exterior PA or ASA/Acrylic would be interesting.
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
I’ve been really interested in a high temp option for the Core, and I was hoping that Prusa was going to offer one. I have a Core kit on order. I’ve just perused the thread, thoughts on starting with a virgin kit? Would an MMU3 be viable? High temp CF/GF filled interior and some kind of colored exterior PA or ASA/Acrylic would be interesting.
I actually also started with the kit! I presume the assembled variant comes with the majority of the tools too. I personally have zero experience and interest in any multi-material unit though, I haven't looked into how I could mod it to work with the optional top panel replacement (The one for filament path strain relief for the particularly brittle filaments), however if you don't do that and the MMU3 doesn't un-enclose the printer I don't see why it wouldn't work! That's because the max chamber temp is still 55c, which is stock, so I'd hope it'd work with those temps! Not too sure where you mean to suggest the "High temp CF/GF filled interior and some kind of colored exterior PA or ASA/Acrylic", but if you mean inside the printer then that's fully up to you to go for! Just note that chamber insulation will need accounting for if you mean adding extra stuff instead of only replacing stock parts. If you mean the interior of the MMU3, I'm sure you could do the exact same of course! Although I see no reason to modify the MMU3 unless you mod the main printer to raise the chamber past 55c, in which case you could likely just modify the mount to include insulation in between the components.
I'm sure it's perfectly doable, and this mod doesn't inherently prohibit it, it would just make it extra challenging if you want both the strain relief on the filament tube, and the MMU3! All presuming the printer stays fully enclosed with it installed of course.
RE:
A little late, but exactly how are you dealing with the integral (PID) tuning for the temp controls??
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
A little late, but exactly how are you dealing with the integral (PID) tuning for the temp controls??
If you mean the heated chamber, it monitors the temp of the pad and makes sure it stays to a currently undecided temperature (Likely just the chamber target temp), and I believe Arduinos can handle PID! And if you mean the hotend, the printer still directly controls both heaters (If you were to also go that route), so standard hotend PID tuning should work! However, even with one 65w heater, autotuning seems to fail beyond ~270c. Manual tuning may be needed! And the chamber will have preset values but if a change is needed it'll have to be manual tuning too.
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
just curious exactly how do i flash this to my core one when looking at prusa's guide it says to put the .bbl file in the root of a usb drive however i cant find a .bbl file for this (sorry im not super great at this stuff)
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
A major issue is the front plexiglass/acrylic panel. Glass temp is just 105 deg with major softening at 80 deg.
Ref: https://bestacrylicsheet.com/acrylic-sheet-performance-temperature-affects/
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
just curious exactly how do i flash this to my core one when looking at prusa's guide it says to put the .bbl file in the root of a usb drive however i cant find a .bbl file for this (sorry im not super great at this stuff)
As of now, it isn't fully finished yet, so I don't have a final firmware file published at the moment! But when I do finish it, you'd just put the file on your drive, make sure it's the only firmware file on there to avoid flashing the wrong one, make sure the appendix bridge on the buddy board is broken to allow flashing of unofficial firmwares, and restart the printer with it plugged in to auto detect it! If it fails to see it, when you see the empty progress bar during boot, hold the knob down for ~1 second, the release, and it should then see the firmware file, then hit "Flash", and when it fails to validate the signature, hit continue/whatever the wording is to proceed anyways! If it won't let you proceed, the appendix isn't broken.
However, I finally have all the parts on the way, so I'm very close to testing assembly and functionality and publishing the final version if all goes well! Really excited to share everything with everyone. Everything should be in in around 2 weeks, as I have to wait on the custom heatblock from PCBWay! Sorry for keeping everyone waiting for ages, I really thought it'd be done by now!
RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber
A major issue is the front plexiglass/acrylic panel. Glass temp is just 105 deg with major softening at 80 deg.
Ref: https://bestacrylicsheet.com/acrylic-sheet-performance-temperature-affects/
The chamber doesn't go above the stock 55c, so this won't be an issue! And I'm going to start with making the chamber heater also never go above 55c, instead of upwards of 100c for faster heating like the bed passive heating does, to minimize part replacements and any unexpected behaviors / damages. Even if the acrylic panels could resist higher, the PETG parts within the printer likely can't, so significant modifications would be needed to raise the max chamber temp! Thanks for bringing this up, though!