HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber  

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

Also, the BQ Panda Breath is only compatible with Klipper. My assumption is that Prusa will have their own active heater mod by end of this year. 

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

The second github is Prusa's internal (and private) github. 

I don't want to rush to put my fork online on GitHub before I can confirm for myself that everything works.

Personally, I am interested in all types of plastics. Where are the limits, what is feasible and what is not, how can it be implemented, what can be solved technically?

For me, this is a process of learning to complete different stages. The activation of the last 160 degrees on the C1 HT through a “simple” firmware change opens up new possibilities for me to implement ideas more easily.

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

Anyone want to take bets on OP having abandoned the project due to setting his C1 on fire? lol

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

Posted by: @kintner

Anyone want to take bets on OP having abandoned the project due to setting his C1 on fire? lol

Close, as my old relay for the heater failed closed/on, but not quite! I've been slowly but surely working on it, and I don't want to jinx it but I think I'm almost done!

I have a pretty large set of updates to share for those interested:
- I have a working prototype of the extra external electronics! Only needs minor tweaks to what the front switches actually switch, and a proper mount for this new relay I grabbed today, before I'm comfortable saying it's finished and posting everything.
- I might have mentioned this somewhere before, but this set of mods now includes an automatically controlled Voxel Bento Box filter, I'm currently coding it to sync with already existing UI filtration settings as I'm writing this!
- I also have a working mount (Left steel panel replacement) for the interior stuff like the heater and filter
- I have discovered that Biomech's left side filament panel is needed to align the spool pre-bend of brittle filaments around the extruder gear, I've installed it and it works! (It makes the tube bend right instead of left when in a modified loading position, forcing the filament to rotate around the tube's radius and point correctly before it enters the extruder, prevents a lot of breakages that happen in the extruder and when paired with a single bearing idler it almost never breaks PPA-CF (The case where it does is described later, in the final list item))
- I'm currently working on modding the swingarm to support the toolhead cable properly with the PTFE tube no longer able to support it (due to the left side filament entrance)! Will likely be a swingarm with multiple hinges, sort of combining the swingarm with a standard cable chain to support the cable along its entire (or 99% of its) length.
- I have officially ditched the hotend wattage upgrade, I cannot find any external MOSFET boards that can support higher currents and switch at Prusa's insanely fast PWM rates, it would require a custom PCB and all that which for me pushes the positives to negatives ratio a little too far towards the negative side to be worth it. As a result the hotend might be unable to reach 500c before the 40w stock heater gets outran by thermal dissipation, but 450c should still be possible and the firmware still allows 500c! I'll have to do some testing, but it'd force the silicone sock off as it'd be roughly 200c above its max temperature! The inside of my printer's sock is already somewhat hardened (non destructively as of roughly 50-70 hours of printing PPA-CF at 300c), can't imagine 450-500 would do it any good!
- I have also ditched the original vision of what an insulated chamber would be, as after installing this heater I have discovered that in a considerably cold room (~16 C / ~60.8 F) after patching some of the larger holes, insulation is simply not needed to keep the printer at temperature, thankfully! If anyone still wants to experiment with it be my guest, I just won't be doing it myself. You can also throw a towel or two over the printer (Keep the back (Mainboard and PSU side) and exhaust uncovered) if need be! I done that before I installed the heater and it actually worked very well.
- I have also modified a food dehydrator to be a high temp filament drybox! Kinda random, but it helps worlds with PPA-CF, which otherwise becomes unusable in around 12-24 hours in a room with average humidity (maybe even on the dry side as I keep my printer's room drier than elsewhere!). I'll provide the model I used if I can find it, alongside instructions and the models when done with all the other mods, in case anyone else can find the same one and is interested in replicating it! I'm about to modify it further to hold Siraya Tech's 2.5kg PPA-CF spools as their interior radius is a lot larger than the 1kg spools, resulting in the entire roll being usable (in theory) when 1kg spools are wound too tightly at around the 300g remaining mark and become unusable (Breaks in the extremely unconstrained and as straight as I could get it extruder path!)

I have a few photos for those who want to see what I have so far (All printed objects are in Siraya Tech PPA-CF, except the bottom panel as it's a prototype, being in Sunlu PLA+), be aware that clean wiring is still in progress and was it was put together clean enough to function, I promise the final versions of everything will have all wires neatly managed! Also ignore the tape on the top of the frame, I haven't printed caps for the corners yet! (For some reason they uploaded in reverse order, for a more cohesive order start at the bottom!)

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

At first, I wanted to take exactly the same approach as you. External components to implement my functions... then Metacollin and the AI engine came along, and I finally solved it by modifying the firmware.

The filament feed is indeed a challenge in itself. Your approach is similar to the modification I made. Ultimately, it has to work 😉

Respect! Great work!

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

So the filament side swap works out without having to move the swing arm?  No binding between the swing arm and the ptfe tube?  

RE: HT CORE One: 500c Nozzle and a Fully Automatic, Inputless, Actively Heated, Insulated Chamber

Posted by: @john-weaver

So the filament side swap works out without having to move the swing arm?  No binding between the swing arm and the ptfe tube?  

I'd be interested in that too