DyzEnd Hotend and termistor temperature

Controllers Smoothie
1

Hi
i upgrade my rumba board for a X5 mini V3 after rewiring everything i have trouble with the termistor of the hotend

i have a DynEnd hotend that can go to 500C
i follow the recommendation of dyzedesign on here support web page

but for the hotend i have some error
Error: MINTEMP or MAXTEMP triggered on T. Check your temperature sensors!
If i type M105 i always get

SENT: M105
READ: ok T:inf /0.0 @0

Some other guys have the same trouble that me ( theideman on this forum)
I guest that if i take a old firmware.bin it will correct the probleme….
I can confirm you that the wiring and termistor are ok

This is my config (hotend ection)

temperature_control.hotend.enable true
temperature_control.hotend.thermistor_pin 0.24
temperature_control.hotend.heater_pin 2.5
#temperature_control.hotend.thermistor EPCOS100K
#temperature_control.hotend.beta 4066

temperature_control.hotend.set_m_code 104
temperature_control.hotend.set_and_wait_m_code 109
temperature_control.hotend.designator T
temperature_control.hotend.max_temp 500
#temperature_control.hotend.min_temp 0

temperature_control.hotend.r0 4700000
temperature_control.hotend.rt_curve 25, 4700000 , 260, 2240 , 500, 83.7
#temperature_control.hotend.coefficients 0.0005377911415 , 0.0001693235352 , 0.00000006894981903

Anyone have a clue ?

Imported from wikidot

2

After more test i think the probleme come from one of this parameters

temperature_control.hotend.r0
temperature_control.hotend.rt_curve
temperature_control.hotend.coefficients

Because when i comment all this parameters, and that i heat manualy the termistor with a heat gun (5 to 10 sec) i got a value of -40 from the Gcode M105
Btw this termistor work correcly with marlin…
If i can help, this is the definition of const from the file thermistortables.h for the marlin firmware

#define OVERSAMPLENR 16

// DyzeDesign 500°C Thermistor
const short temptable_66[][2] PROGMEM = {
{ 17.5 * OVERSAMPLENR, 850 },
{ 17.9 * OVERSAMPLENR, 500 },
{ 21.7 * OVERSAMPLENR, 480 },
{ 26.6 * OVERSAMPLENR, 460 },
{ 33.1 * OVERSAMPLENR, 440 },
{ 41.0 * OVERSAMPLENR, 420 },
{ 52.3 * OVERSAMPLENR, 400 },
{ 67.7 * OVERSAMPLENR, 380 },
{ 86.5 * OVERSAMPLENR, 360 },
{ 112.0 * OVERSAMPLENR, 340 },
{ 147.2 * OVERSAMPLENR, 320 },
{ 194.0 * OVERSAMPLENR, 300 },
{ 254.3 * OVERSAMPLENR, 280 },
{ 330.2 * OVERSAMPLENR, 260 },
{ 427.9 * OVERSAMPLENR, 240 },
{ 533.4 * OVERSAMPLENR, 220 },
{ 646.5 * OVERSAMPLENR, 200 },
{ 754.4 * OVERSAMPLENR, 180 },
{ 844.3 * OVERSAMPLENR, 160 },
{ 911.7 * OVERSAMPLENR, 140 },
{ 958.6 * OVERSAMPLENR, 120 },
{ 988.8 * OVERSAMPLENR, 100 },
{ 1006.6 * OVERSAMPLENR, 80 },
{ 1015.8 * OVERSAMPLENR, 60 },
{ 1021.3 * OVERSAMPLENR, 30 },
{ 1023 * OVERSAMPLENR - 1, 25},
{ 1023 * OVERSAMPLENR, 20}
};

Someone can help me to find the right value ?
Thanks