Archive for August 15th, 2011
Just for completeness, it turns out that extrusion temperature doesn’t have any effect on Reversal zits. A while back I dropped the standard temperature from 210 °C to 190 °C in one fell swoop and it didn’t change anything worth mentioning, let alone the zittage.
The white one was hotter, the orange one is cooler:
The zits are pretty much due to Reversal followed by in-plane motion, it seems to me.
A dramatically lower extrusion temperature works fine for smaller objects, but I’d expect very large objects to delaminate like crazy. The Barbie Pistol was, IIRC, printed at 220 °C, and it had some troubles.
It’s also worth noting that the indicated temperature has only a casual relationship to the actual extrusion temperature. I’ve put considerable effort into electrically insulating and thermally bonding the thermocouple to the Thermal Core, so I think it’s a good indicator, but your results will certainly differ.