Thermal Runaway Error
Posted by Montiey
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Thermal Runaway Error January 04, 2016 06:13PM |
So, I just ditched the MakerFarm firmware for the latest Marlin firmware. Works great, enjoying the new features. BUT! Heres the deal:
I preheat the printer long before I start a print, since i'm using the stock PCB heater with a 4.81mm aluminum plate. The thing takes 5 mins to heat up, but is very stable and doesn't flex and give horrible ridges on prints when the PID is slightly off. My nozzle (trouble maker) heat upon preheat is 140°C, just so the PLA doesn't cause an apocalyptic flood. Later, when I run the GCode from the card, the bed keeps temp, but the nozzle starts to heat up, as normal. Then, Marlin throws a THERMAL RUNAWAY error. I believe what is happening is that the parameters in Marlin don't let the temp stay away from the target for more than X seconds, but only AFTER it has reached the target once. What am I supposed to do? I want to change targets, (from 140 to ~210) but it seems like Marlin has already entered "safety mode", and won't ignore the limits. I can increase the max time for the temp to deviate, but that would compromise the purpose of this feature. Any thoughts?
Master Tinkerer
I preheat the printer long before I start a print, since i'm using the stock PCB heater with a 4.81mm aluminum plate. The thing takes 5 mins to heat up, but is very stable and doesn't flex and give horrible ridges on prints when the PID is slightly off. My nozzle (trouble maker) heat upon preheat is 140°C, just so the PLA doesn't cause an apocalyptic flood. Later, when I run the GCode from the card, the bed keeps temp, but the nozzle starts to heat up, as normal. Then, Marlin throws a THERMAL RUNAWAY error. I believe what is happening is that the parameters in Marlin don't let the temp stay away from the target for more than X seconds, but only AFTER it has reached the target once. What am I supposed to do? I want to change targets, (from 140 to ~210) but it seems like Marlin has already entered "safety mode", and won't ignore the limits. I can increase the max time for the temp to deviate, but that would compromise the purpose of this feature. Any thoughts?
Master Tinkerer
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Re: Thermal Runaway Error January 05, 2016 05:59PM |
I had set the period for the nozzle and bed to less than 1 minute. Increased the nozzle to 150 seconds, and the bed to 300. It can successfully change temperatures now.
Master Tinkerer
Master Tinkerer
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Re: Thermal Runaway Error January 30, 2016 03:11PM |
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Re: Thermal Runaway Error January 30, 2016 03:27PM |
Quote
Downunder35m
Google is my friend, let it be yours as well
https://github.com/MarlinFirmware/Marlin/issues/2582
Thanks.
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