Hotend faults



  • When I PID tune it works great. But when I try to print the bed heats fine, then the hot end turns on and in about 5 seconds it faults and says not heating quick enough. Any ideas what is happening. This a Diamond 5 head



  • Did you save the PID settings after running the autotune on the hotend?



  • What heater cartridge are you using? Is it the ridiculous 80Watt one that RepRap.me supply as standard? If you post that information and the M307 values that you have in config.g (or config-overide if you went that route), I'll compare them to mine.



  • @deckingman:

    What heater cartridge are you using? Is it the ridiculous 80Watt one that RepRap.me supply as standard? If you post that information and the M307 values that you have in config.g (or config-overide if you went that route), I'll compare them to mine.

    I have the 12v 60w. Here are my numbers A340 C140 D5.5 S1 B0 if this helps



  • @deckingman:

    What heater cartridge are you using? Is it the ridiculous 80Watt one that RepRap.me supply as standard? If you post that information and the M307 values that you have in config.g (or config-overide if you went that route), I'll compare them to mine.

    I have a 12v 60w and these are my numbers A340 C140 D5.5 S1 B0

    Is there some place to change a number so it doesn't expect it to heat up so fast



  • in the config.g you can tell it to expect a wait time for a slower heat up:

    M570 S180 ; Hot end may be a little slow to heat up so allow it 180 seconds

    EDIT: IGNORE ALL OF THAT ABOVE. I didn't realize this had changed in recent versions. Sorry!


  • administrators

    The parameters for M570 changed a few versions ago. See https://duet3d.com/wiki/G-code#M570:_Configure_heater_fault_detection.



  • @Wild:

    @deckingman:

    What heater cartridge are you using? Is it the ridiculous 80Watt one that RepRap.me supply as standard? If you post that information and the M307 values that you have in config.g (or config-overide if you went that route), I'll compare them to mine.

    I have a 12v 60w and these are my numbers A340 C140 D5.5 S1 B0

    Is there some place to change a number so it doesn't expect it to heat up so fast

    Unfortunately I have numbers for 40 Watt and 80 Watt (both 24 volt) but not 60 Watt.

    However, those numbers are a bit spooky because they are identical to the example shown in the Wiki for M307. Which leads me to the obvious question of have you tuned the heater and did you enter the results of that M303 into config.g or use M500 to put them into config-overide sys? If the latter have you put M501 at the end of your config.g file to read those stored values?

    For info, the dominant time constant (C) that you have is radically different at 140 to both my 40 watt and 80 watt results. Mine are all around 190.

    HTH



  • Ok fixed the problem set M570 for S180 now it works


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