On first print 8 minutes of heating the printer.  

RE: On first print 8 minutes of heating the printer.

Don't know what you're trying to print. In the absence of additional information, my best guess is that the Core ONE is waiting to reach a certain chamber temperature. 130 degrees is the idle temperature while waiting.

RE: On first print 8 minutes of heating the printer.

There is "absorbing heat" period because of thermal expansion of steel frame and other components. It's different time for different bed and chamber printing temperatures. If you don't need exceptional dimensional accuracy of the prints, you can skip it.

RE: On first print 8 minutes of heating the printer.

Posted by: @biomech

There is "absorbing heat" period because of thermal expansion of steel frame and other components. It's different time for different bed and chamber printing temperatures. If you don't need exceptional dimensional accuracy of the prints, you can skip it.

That can't be right. The coefficient of linear expansion of steel is 10.6 micrometers per meter °C. Even at a chamber temp of 50°C (delta of 30 °C from room temp), the half meter tall printer would only lengthen by ~0.16 mm, and the distance between datums in the build volume would be much smaller.

I've seen that heat soak message before while printing PLA with a room temp chamber. Nothing is moving around due to heat in that case.

RE: On first print 8 minutes of heating the printer.

I have seen 15 minutes heat soak with ASA on colder days. Now after a few weeks without failing prints I just leave it to do its thing.

RE: On first print 8 minutes of heating the printer.

Posted by: @altaic

Posted by: @biomech

There is "absorbing heat" period because of thermal expansion of steel frame and other components. It's different time for different bed and chamber printing temperatures. If you don't need exceptional dimensional accuracy of the prints, you can skip it.

That can't be right. The coefficient of linear expansion of steel is 10.6 micrometers per meter °C. Even at a chamber temp of 50°C (delta of 30 °C from room temp), the half meter tall printer would only lengthen by ~0.16 mm, and the distance between datums in the build volume would be much smaller.

I've seen that heat soak message before while printing PLA with a room temp chamber. Nothing is moving around due to heat in that case.

There are many parts and the thermal deformation error chain may lead to print imperfections. Read something about "preheating of CNC machines", it's the real thing, even with machines that are not intentionally heated.

RE: On first print 8 minutes of heating the printer.

Posted by: @biomech

Read something about "preheating of CNC machines", it's the real thing, even with machines that are not intentionally heated.

That’s rather hostile. I have a lot of experience with CNC machines and metrology, thank you very much. If you’d care to talk about specifics, I’ll be happy to converse.

RE: On first print 8 minutes of heating the printer.

Did the meaning of "absorbing heat" change vs. the XL?  I assumed that was for the print bed to reach a uniform temperature end to end-  since that's what it means on the (unenclosed by default) XL.  And the higher the bed temp, the longer the "absorbing heat".  The chamber temperature cycle is a separate thing entirely on the CORE (and maybe on the enclosed XL too- I don't have the official enclosure).

RE: On first print 8 minutes of heating the printer.

Did the meaning of "absorbing heat" change vs. the XL?

No it hasn't. It's as you described. And separate from the chamber heating step.