Was just looking for a solution on pushing higher nozzle temps on my mk4s so I would be very interested

Currently, printing with PPA-CF or PPS is not possible in the C1 without a minimum change to the idler. The MK4S has it easier – the filament can be fed straight from above and the bend of the brittle filament can follow the curve of the extruder.

It is more difficult on the C1. The bend in the filament is twisted 180 degrees and the risk of it breaking is inevitable. I had to find this out for myself and it has also been confirmed by other forum members. If there had been enough space, Prusa would have preferred to move the filament feed to the other side.

I had already posted this in the other two threads, but it fits well here too.

Here’s an example of how Prusa could have done it. I mean, it’s the same as the original, just the other way around.

The advantage: NOW the C1 eats everything without breaking. P.S.: Wordplay

https://forum.prusa3d.com/forum/prusa-core-one-general-discussion-announcements-and-releases/printing-siraya-tech-ppa-cf-on-a-core-one/#post-785823

Posted by: @vhubbard

I want it for the MK4s. I already have a Prusa enclosure.   All my Nextruder parts are PC-CF.  No Petg left.  The print fan end may need to be modified if the heat block is bigger. 

Look at this:

https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-user-mods/print-pei-mk4-high-temp-450-c-mod-is-here/#post-783412

Posted by: @jurgen-7

Posted by: @jurgen-7

Now that consumer CoreXY printers have become a commodity available from many Chinese companies, maybe the next wave will be sub-$2000 delta printers?

Come to think of it, a CoreXY printer with additional measures to support operation at high chamber temperatures may be more likely. Motorized belt tensioners (with a quick calibration before every print, after the chamber is heated to the target temperature) and active air cooling for the XY and extruder motors should go a long way. 

QIDI already offer sub $1K printers with 65C active chambers and a 350C hotend. For 99.9% of hobbiest that should be good enough. Even an actively heated 50C chamber on a Core One would be a welcome addition. As it is I have to run the bed at 115-120C to keep the chamber hot. This is where alot of the warping happens when there is such a large temperature differential between the bed and the chamber. I want to be able to have a 50-55C chamber (well below belt and motor temp limits) where I can run the bed at a sensible 60-80C. I could care less about a 350-400C hotend (which is by now standard on even budget printers). 

Now that consumer CoreXY printers have become a commodity available from many Chinese companies, maybe the next wave will be sub-$2000 delta printers?

Come to think of it, a CoreXY printer with additional measures to support operation at high chamber temperatures may be more likely. Motorized belt tensioners (with a quick calibration before every print, after the chamber is heated to the target temperature) and active air cooling for the XY and extruder motors should go a long way. 

The first sub-$2.5k desktop printer that can make 80-100c actively heated chamber a reality will sell like hotcakes.

High chamber temperature seems significantly more difficult to achieve than a hotter hotend. With the CoreXY design, the whole toolhead as well as the XY motors and belts will be exposed to that temperature. So overheating of active components, as well as temperature compensation of the XY positioning mechanism including the belts, become a headache.

There's probably a reason why the HT90 uses a delta geometry, which keeps the drive motors outside of the heated chamber and avoids rubber belts in the drive.  Now that consumer CoreXY printers have become a commodity available from many Chinese companies, maybe the next wave will be sub-$2000 delta printers?