Controlling heat distribution in plastic extruder barrel July 24, 2016 03:09AM |
Registered: 7 years ago Posts: 1 |
Re: Controlling heat distribution in plastic extruder barrel July 24, 2016 02:10PM |
Registered: 10 years ago Posts: 550 |
5? not .5? 5 is way to much, either you have issues with the cooling near the sensor or the PID was not correctly tuned or some changes were made and you forgot to tune the PID again.Quote
gstrooder
The control loop itself seems to be OK as the PIDs will manage to oscillate +- 5 degrees around the measured temperature at the thermocouple
That peak is only important if the plastic is really slowly extruded, that said I don't really care about the temp near the band heaters, For me the nozzle temp. is the most important temp.Quote
gstrooder
Unfortunately on the inside of the barrel the temperature seems to spike at the centre of the heater band by about +70 degrees which is way too much deviation to safely extrude plastic