My procedure is as follows:
- Start with 220 Celsius.
- Set extrusion speed at 40 mm/s (that's what I'm using for most prints).
- Extrude 20 mm.
- Check quality of the extruded wire: it should be smooth, glossy and strong.
- If not, increase temperature in 5 Celsius steps, repeat 3 and 4 above and check here.
- If extrusion tend to be rougher, it means temperature is too high, go back to 215 Celsius, repeat step 3 and 4, downwards in 5 Celsius steps and check here.
- After a few iterations, I get a range of good extrusion temperature, where the lower limit is signaled by rough extrusion (usually well before the extruder starts skipping steps).
- Thea actual temperature depends mainly on the printing speed, but if the filament does not ooze excessively, I can easily print with one temperature from 20 to 80 mm/s.
Well, please note that I'm not using an UM, but I thing the procedure is machine independent.
This is a good question for google groups. You should post it there also.
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