Core One / Print Temperatures
For me, the Core One looks like it is almost exactly right. I can see it being great for a print farm. Below is not intended as a gripe. But rather, a genuine question about the reason for the max chamber temp.
The only thing I am wondering about is why 55°C? J. Prusa mentioned printing PC. 55°C may be warm enough to get small PC parts to print without major deformation, but not larger flat parts, etc. Most of the electronics are rated to 80°C... Standard motors are rated to over 100°C. The PC-CF parts they use don't soften until over 100°C.
It feels like this could have been a 70°C max printer for essentially no production cost difference, which would have made it an ABS beast. And would have made it slightly more plausible for the various entry-level engineering materials. Maybe it would have needed more insulation? A different finish to prevent burns (or fear of burns) by customers?
Are there regulatory reasons? Anything else?
RE:
I print ABS parts with +35 in the chamber, it really is not needed to go that high.
The most warping material the we ever tried was Taulman pure PA6. That warps so hard that it can rip Prevailent off a satin plate. ABS is not in the same league, peace of cake.
In general PA materials warp more than ABS.
My biggest concern about Core is if it works in a hot workshop. Our MK4s mostly print from Nylon and in the summer we keep doors propped open. With that, the chamber temperature is teetering under +48. The ambient temperature is +43C (110F).
Another thing I'm curious about if Core can cold-start. On winter mornings, we use a 60W incandescent light to heat up enclosures of MK3S and MK4 before we can print. Honestly their beds could easily serve as pre-warmers if we disabled alarms, but we want to keep all the safeguards in place for routine operation. Czechia is supposed to be a cooler country, but for some reason this always was a problem.
RE: Core One / Print Temperatures
For me, the Core One looks like it is almost exactly right. I can see it being great for a print farm. Below is not intended as a gripe. But rather, a genuine question about the reason for the max chamber temp.
The only thing I am wondering about is why 55°C? J. Prusa mentioned printing PC. 55°C may be warm enough to get small PC parts to print without major deformation, but not larger flat parts, etc. Most of the electronics are rated to 80°C... Standard motors are rated to over 100°C. The PC-CF parts they use don't soften until over 100°C.
It feels like this could have been a 70°C max printer for essentially no production cost difference, which would have made it an ABS beast. And would have made it slightly more plausible for the various entry-level engineering materials. Maybe it would have needed more insulation? A different finish to prevent burns (or fear of burns) by customers?
Are there regulatory reasons? Anything else?
I believe the 55 C limit is because the chamber is passively heated by the print bed heater vs the Prusa Pro HT90 which has an actively heated chamber and thus able to get much hotter.