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Cooling fan attached to extruder
Posted: Mon Mar 23, 2015 10:39 pm
by avangelking
Okay, so this is my issue. After printing the first and second fan casings as well as connecting the fans and recalibrating the PID for the extruder, for some reason I can not get the extruder to reach temperatures any higher than 215C. Please tell me, what could I be doing wrong? Also I have the Rostock Max V2
Re: Cooling fan attached to extruder
Posted: Tue Mar 24, 2015 12:05 am
by Nylocke
What is your PID drive Max set to? If its 205 thats too low, bump it to 230.
The other thing is power resistors for the heating element aren't that reliable. Heater cartridges (pretty cheap tbh) are much more robust and reliable. They also heat faster and deliver a more stable temp. If your resistors ever fail I'd strongly recommend you replace them with one cartridge. Gene has a nice guide to upgrade the stock hotend in the Rostock MAX V2 sub forum.
Re: Cooling fan attached to extruder
Posted: Tue Mar 24, 2015 12:17 am
by Earthbound
#1 reason for not reaching target temp after adding fan is airflow over bottom of the hot end. Wrap some kapton tape around the block that contains the resistors and thermistor. This will insulate them from the airflow. Then run PID tuning again.
Re: Cooling fan attached to extruder
Posted: Tue Mar 24, 2015 3:34 pm
by avangelking
Nylocke wrote:What is your PID drive Max set to? If its 205 thats too low, bump it to 230.
The other thing is power resistors for the heating element aren't that reliable. Heater cartridges (pretty cheap tbh) are much more robust and reliable. They also heat faster and deliver a more stable temp. If your resistors ever fail I'd strongly recommend you replace them with one cartridge. Gene has a nice guide to upgrade the stock hotend in the Rostock MAX V2 sub forum.
This is not my first rodeo, but how do I go about installing these?
Re: Cooling fan attached to extruder
Posted: Tue Mar 24, 2015 3:37 pm
by Nylocke
http://forum.seemecnc.com/viewtopic.php?f=54&t=2594
The heater cartridges can be bought all over the Internet, as can the thermistors
Re: Cooling fan attached to extruder
Posted: Tue Mar 24, 2015 7:39 pm
by avangelking