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Hotend doesnt heat up

Posted by hichamom 
Hotend doesnt heat up
June 24, 2018 03:57PM
hello guys well as i said the hotend doe heat at all
how i can fix it plz
my conf
#define TEMP_SENSOR_0 8
#define TEMP_SENSOR_1 0
#define TEMP_SENSOR_2 0
#define TEMP_SENSOR_3 0
#define TEMP_SENSOR_4 0
#define TEMP_SENSOR_BED 0

// Dummy thermistor constant temperature readings, for use with 998 and 999
#define DUMMY_THERMISTOR_998_VALUE 25
#define DUMMY_THERMISTOR_999_VALUE 100

// Use temp sensor 1 as a redundant sensor with sensor 0. If the readings
// from the two sensors differ too much the print will be aborted.
//#define TEMP_SENSOR_1_AS_REDUNDANT
#define MAX_REDUNDANT_TEMP_SENSOR_DIFF 10

// Extruder temperature must be close to target for this long before M109 returns success
#define TEMP_RESIDENCY_TIME 10 // (seconds)
#define TEMP_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one
#define TEMP_WINDOW 1 // (degC) Window around target to start the residency timer x degC early.

// Bed temperature must be close to target for this long before M190 returns success
#define TEMP_BED_RESIDENCY_TIME 10 // (seconds)
#define TEMP_BED_HYSTERESIS 3 // (degC) range of +/- temperatures considered "close" to the target one
#define TEMP_BED_WINDOW 1 // (degC) Window around target to start the residency timer x degC early.

// The minimal temperature defines the temperature below which the heater will not be enabled It is used
// to check that the wiring to the thermistor is not broken.
// Otherwise this would lead to the heater being powered on all the time.
#define HEATER_0_MINTEMP 5
#define HEATER_1_MINTEMP 5
#define HEATER_2_MINTEMP 5
#define HEATER_3_MINTEMP 5
#define HEATER_4_MINTEMP 5
#define BED_MINTEMP 5

// When temperature exceeds max temp, your heater will be switched off.
// This feature exists to protect your hotend from overheating accidentally, but *NOT* from thermistor short/failure!
// You should use MINTEMP for thermistor short/failure protection.
#define HEATER_0_MAXTEMP 275
#define HEATER_1_MAXTEMP 275
#define HEATER_2_MAXTEMP 275
#define HEATER_3_MAXTEMP 275
#define HEATER_4_MAXTEMP 275
#define BED_MAXTEMP 150

Edited 1 time(s). Last edit at 06/24/2018 04:07PM by hichamom.
Re: Hotend doesnt heat up
June 24, 2018 04:31PM
What is the temperature of the Bed and the Hot-end on startup.
Re: Hotend doesnt heat up
June 24, 2018 05:03PM
Quote
Roberts_Clif
What is the temperature of the Bed and the Hot-end on startup.
thanks for the reply Roberts i dont use the heat bed
no the hotend does heat at all it remains 0 degree
Re: Hotend doesnt heat up
June 24, 2018 05:17PM
here is my cong file plz take a look
Attachments:
open | download - Configuration.h (64.8 KB)
Re: Hotend doesnt heat up
June 24, 2018 06:39PM
Quote
hichamom
thanks for the reply Roberts i dont use the heat bed
no the hotend does heat at all it remains 0 degree

It should show room temp at least. Start with the thermistor.


My updated Instructable on our Prusa i3 Build
[www.instructables.com]
Re: Hotend doesnt heat up
June 24, 2018 07:19PM
Quote
SteveRoy

It should show room temp at least. Start with the thermistor.

Correct

It Should show about 20-25C

Don't believe I have ever seen exactly 0C

Use a hair dryer see if you can heat the hot-end heater Block and change the temperature.

Until the hot-end temperature reaches 15C Marlin Firmware will not allow the Controller to switch the power on to the hot-end.

Edited 2 time(s). Last edit at 06/24/2018 07:23PM by Roberts_Clif.
Re: Hotend doesnt heat up
June 25, 2018 01:53AM
Quote
Roberts_Clif
Quote
SteveRoy

It should show room temp at least. Start with the thermistor.

Correct

It Should show about 20-25C

Don't believe I have ever seen exactly 0C

Use a hair dryer see if you can heat the hot-end heater Block and change the temperature.

Until the hot-end temperature reaches 15C Marlin Firmware will not allow the Controller to switch the power on to the hot-end.
here is an image for better explain

Re: Hotend doesnt heat up
June 25, 2018 01:58AM
It shows 713c on the hot end. This often indicates that your thermistor legs are shorted together

BUT I also notice you have set motherboard to "BOARD_RAMPS_14_EFD" in your configuration.h

this is not a valid option

either "BOARD_RAMPS_14_EFB" or "BOARD_RAMPS_14_EFF"

having the incorrect motherboard will mean it will look at the wrong pins for thermistors and give you wrong readings.

This shouldn't even compile and should give an error

exit status 1
#error "Unknown MOTHERBOARD value set in Configuration.h"

Edited 3 time(s). Last edit at 06/25/2018 02:13AM by Dust.
Re: Hotend doesnt heat up
June 25, 2018 08:44PM
Quote
Dust

I also notice you have set motherboard to "BOARD_RAMPS_14_EFD" in your configuration.h

I missed that Dust / Good Catch!
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