It only needs to be at a higher temp than the glass transition of the material. The higher temp in 3D printers is to transfer heat faster. That’s also why volcano nozzles exist to have a longer heat transfer area, needing lower temps or allowing faster filament flow. The flow of a 3D pen being ridiculously slow (you’re inherently slower than a printer when using a pen) it doesn’t need such a fast heat transfer.
Pretty sure it would still get to the same overall temps as it needs to melt the plastic.
It only needs to be at a higher temp than the glass transition of the material. The higher temp in 3D printers is to transfer heat faster. That’s also why volcano nozzles exist to have a longer heat transfer area, needing lower temps or allowing faster filament flow. The flow of a 3D pen being ridiculously slow (you’re inherently slower than a printer when using a pen) it doesn’t need such a fast heat transfer.