Change extruder stepper...how to do it?

Hi guys.
I have gt2560 rev.b and my original extruder slot stop work.
I have 2 free slot for add extruders.
What i have to mod in firmware for work on 2nd slot?

Presuming you have tried swapping the stepper driver module and it not just a dead stepper driver...

You need to change the appropriate pins.h file for your controller.

Looks like motherboard is set to BOARD_ULTIMAKER for these boards, so this is a starting point.

Now depending if you have a older firmware or a newer firmware you have to look in different places
in older firmware everything was in pins.h, in newer they split it up into different files, looks like its pins_ULTIMAKER.h

If its one large pins.h file you need to fine the correct section, search for "Ultimaker pin assignment" directly under that you will find the pins for your hardware

you will find something like

#define E0_STEP_PIN 43
#define E0_DIR_PIN 45
#define E0_ENABLE_PIN 41

#define E1_STEP_PIN 49
#define E1_DIR_PIN 47
#define E1_ENABLE_PIN 4

simply swap all the E0 and E1 Pins over and the extruder will start to use the E1 socket.

Yes...I try to swap the pin assignment,but temp sign -14°
I search in motherboard's datasheet and assign relative pin,but still -14°
I'm on 2.0 now,and I cant move estruder

Little question....I've to swap the molex connector too or keep it in original place?

yes you have to move the stepper molex connector, and you have to move the stepper driver if that slot is empty

temperature has nothing to do with stepper motors...

Ok....This is my situation.
I have to solder the 12 pin,cause the board haven't....
It's right like this?
Now I've only to find the temp pin?

Ah I see... non standard connectors for extruders where everything is grouped together... didn't notice this originally.


yes you will have to solder in a new header


after quite a bit of searching I found this circuit diagram [github.com]
and new firmware [github.com]
with is own boards file [github.com]

but this doesn't tell you directly what the thermistor pins are

name, phiscal pin,  arduino pin  
t2       86    analog 11
t bed    87    analog 10
t1       88    analog 9
t0       89    analog 8

So it one of the above 4

Edited 1 time(s). Last edit at 11/08/2018 10:02PM by Dust.

Well I did it!!!
I have to edit and delete the string of old extruder and add a9 for temp sensor.
Now work all

Thanks for help

It's normal that when I switch on the printer,give me -14C° on extruder? Bed give me 19(room temp) and early the same on bed
Yesterday when I try and test give me the right temp.
Today,work anyway,but start -14C°
I don't know if this issue give a problem with the real extrusion temp

Seems to be solved.....Now don't give me -14C° on start