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About heating failed system stopped heater_id 0

Posted by cthsieh 
About heating failed system stopped heater_id 0
April 21, 2018 04:22AM
Hello everyone,
My machine always can't reach the temperature above 170 oC. This event happened after I replaced a J-head hotend by a E3d V6. I did renew the firmware "Marlin". The printer is working fun except that his hotend can't reach the temperature above 170 oC. I did run the "M303" PID autotune with low temperature and updated new PID values. Unfortunately, it still can't reach higher temperature. Basically, the speed of heating up always gradually decrease when its temperature is rising. Does anyone know the problem?
Re: About heating failed system stopped heater_id 0
April 21, 2018 06:57AM
Either you installed a 24v hot end on a 12v system, or the thermistor is reading incorrectly
Re: About heating failed system stopped heater_id 0
April 21, 2018 08:10AM
Dear Dust,
If the thermistor is reading incorrectly, would you kindly to talk me how to fix the problem?
Re: About heating failed system stopped heater_id 0
April 21, 2018 08:35AM
you set the correct thermistor tables in the firmware

eg marlin in Configuration.h

select your thermistor from the table

/**
 * --NORMAL IS 4.7kohm PULLUP!-- 1kohm pullup can be used on hotend sensor, using correct resistor and table
 *
 * Temperature sensors available:
 *
 *    -3 : thermocouple with MAX31855 (only for sensor 0)
 *    -2 : thermocouple with MAX6675 (only for sensor 0)
 *    -1 : thermocouple with AD595
 *     0 : not used
 *     1 : 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
 *     2 : 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
 *     3 : Mendel-parts thermistor (4.7k pullup)
 *     4 : 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
 *     5 : 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (4.7k pullup)
 *     6 : 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
 *     7 : 100k Honeywell thermistor 135-104LAG-J01 (4.7k pullup)
 *    71 : 100k Honeywell thermistor 135-104LAF-J01 (4.7k pullup)
 *     8 : 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup)
 *     9 : 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup)
 *    10 : 100k RS thermistor 198-961 (4.7k pullup)
 *    11 : 100k beta 3950 1% thermistor (4.7k pullup)
 *    12 : 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup) (calibrated for Makibox hot bed)
 *    13 : 100k Hisens 3950  1% up to 300°C for hotend "Simple ONE " & "Hotend "All In ONE"
 *    20 : the PT100 circuit found in the Ultimainboard V2.x
 *    60 : 100k Maker's Tool Works Kapton Bed Thermistor beta=3950
 *    66 : 4.7M High Temperature thermistor from Dyze Design
 *    70 : the 100K thermistor found in the bq Hephestos 2
 *    75 : 100k Generic Silicon Heat Pad with NTC 100K MGB18-104F39050L32 thermistor
 *
 *       1k ohm pullup tables - This is atypical, and requires changing out the 4.7k pullup for 1k.
 *                              (but gives greater accuracy and more stable PID)
 *    51 : 100k thermistor - EPCOS (1k pullup)
 *    52 : 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
 *    55 : 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (1k pullup)
 *
 *  1047 : Pt1000 with 4k7 pullup
 *  1010 : Pt1000 with 1k pullup (non standard)
 *   147 : Pt100 with 4k7 pullup
 *   110 : Pt100 with 1k pullup (non standard)
 *
 *         Use these for Testing or Development purposes. NEVER for production machine.
 *   998 : Dummy Table that ALWAYS reads 25°C or the temperature defined below.
 *   999 : Dummy Table that ALWAYS reads 100°C or the temperature defined below.

and set TEMP_SENSOR_0 to that number

eg

#define TEMP_SENSOR_0 1
Re: About heating failed system stopped heater_id 0
April 21, 2018 08:43AM
But I suspect its much more likely that you have a 24v heater... as a normal hotend can easily get hot enough to melt aluminium!

If you have a multimeter and check the resistance of your heater cartridge against the table below. Expect your value to deviate a little from these,
Ie remove the hotend heater cartage plug or screws from your controller and measure the resistance of the heater threw the disconnected cables and compare to the table below.

P\V	                 12v	  24v
25w (Blue Leads)	5.76Ω	23.04Ω
30w (Blue Leads)	4.8Ω	19.2Ω
40w (Red Leads)	        3.6Ω	14.4Ω

Edited 2 time(s). Last edit at 04/21/2018 08:48AM by Dust.
Re: About heating failed system stopped heater_id 0
April 22, 2018 10:08PM
Dear Dust,
I measured the resistance of my heater cartage and its value is around 4.9 Ω. Based on your reference, the heater cartage is for 12 V. My controller board is Arduino Mega 2560+ RAMPS 1.4 and the hotend is connected in the port D10. About the configuration of the thermistor, I had tried 1, 5 and 11, but the results are same. The heater always failed when the temperature is above around 170 oC. Do you have any suggestion? Thank you for your kind help.
Re: About heating failed system stopped heater_id 0
April 22, 2018 10:40PM
ok... thats odd.

Measure the resistance of the thermistor. It should be about 100K at 25c, perhaps its damaged

Is the thermistor well and truly secured to the hot end? Even a 1mm gap will cause it to read very low.

Also measure your 12v at D10 to the hot end, perhaps its way under voltage?
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