100K NTC B 3950 thermistor issue

Discussion in 'HotEnds & Extruders' started by ejder, Feb 24, 2021.

  1. ejder

    ejder Member

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    hi, i recently replace my stock hotend with e3d v6. I keep heater and termistor as it is. After a while i needed to replace original thermistor with 100K NTC B 3950 because i accidently broke the original one.

    In marlin firmware i try all of the thermistor options available but no luck. Seller confirms that thermistor is 100K NTC B 3950 . i measure resistance at 21 degrees is around 103 khms and voltage between cables around 2.3 V. so it seems no defect Any ideas to help me ?

    Temperature sensors available:
    *
    * -5 : PT100 / PT1000 with MAX31865 (only for sensors 0-1)
    * -3 : thermocouple with MAX31855 (only for sensors 0-1)
    * -2 : thermocouple with MAX6675 (only for sensors 0-1)
    * -4 : thermocouple with AD8495
    * -1 : thermocouple with AD595
    * 0 : not used
    * 1 : 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
    * 331 : (3.3V scaled thermistor 1 table for MEGA)
    * 332 : (3.3V scaled thermistor 1 table for DUE)
    * 2 : 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
    * 202 : 200k thermistor - Copymaster 3D
    * 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-2/104NT-4-R025H42G (Used in ParCan & J-Head) (4.7k pullup)
    * 501 : 100K Zonestar (Tronxy X3A) Thermistor
    * 512 : 100k RPW-Ultra hotend thermistor (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"
    * 15 : 100k thermistor calibration for JGAurora A5 hotend
    * 18 : ATC Semitec 204GT-2 (4.7k pullup) Dagoma.Fr - MKS_Base_DKU001327
    * 20 : Pt100 with circuit in the Ultimainboard V2.x with 5v excitation (AVR)
    * 21 : Pt100 with circuit in the Ultimainboard V2.x with 3.3v excitation (STM32 \ LPC176x....)
    * 201 : Pt100 with circuit in Overlord, similar to Ultimainboard V2.x
    * 60 : 100k Maker's Tool Works Kapton Bed Thermistor beta=3950
    * 61 : 100k Formbot / Vivedino 3950 350C thermistor 4.7k pullup
    * 66 : 4.7M High Temperature thermistor from Dyze Design
    * 67 : 450C thermistor from SliceEngineering
    * 70 : the 100K thermistor found in the bq Hephestos 2
    * 75 : 100k Generic Silicon Heat Pad with NTC 100K MGB18-104F39050L32 thermistor
    * 99 : 100k thermistor with a 10K pull-up resistor (found on some Wanhao i3 machines)
    *
    * 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)
    *
    * 1000 : Custom - Specify parameters in Configuration_adv.h
    *
    * 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.
     
  2. ejder

    ejder Member

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    So, i ordered a new thermistor still same problem. By the meantime i tested mainboard input for nozzle thermistor with a potentiometer, it is reading resistance changes. I can heat up but it starts from 108 degree and goes up.
     
  3. ejder

    ejder Member

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