SOLVED Second Extruder

[Erkan3D 3]

I have bought an stepper motor and connected to E2 port of the board. I am using cura with the latest version and added 2nd extruder to a "customized printer" which is UM2. But 2nd motor didn't work even I choose the 2nd extruder for the part? I wont connect a nozzle, I want only the motor work. What can I do?

[ahoeben 1,849]

I think what's happening here is that the firmware is trying to prevent you from pushing cold filament through a nozzle; the firmware does not know you don't have a hotend to go with the extruder motor.

I think there's a gcode command to lower the minimum nozzle temperature at which the extruder motor will try to extrude. You could put that in your start gcode.

Edited November 17, 2017 by Guest

[Erkan3D 3]

I think what's happening here is that the firmware is trying to prevent you from pushing cold filament through a nozzle; the firmware does not know you don't have a hotend to go with the extruder motor.

I think there's a gcode command to lower the minimum nozzle temperature at which the extruder motor will try to extrude. You could put that in your start gcode.

That should be M302... I will try

Update:

Tried and it started printing without heating nozzle and tried to extrude the filament with first extruder. 2nd one didn't work...

Edited November 17, 2017 by Guest

[neotko 1,417]

I think what's happening here is that the firmware is trying to prevent you from pushing cold filament through a nozzle; the firmware does not know you don't have a hotend to go with the extruder motor.

I think there's a gcode command to lower the minimum nozzle temperature at which the extruder motor will try to extrude. You could put that in your start gcode.

That should be M302... I will try

Update:

Tried and it started printing without heating nozzle and tried to extrude the filament with first extruder. 2nd one didn't work...

Do the M302 after the tool change

[Erkan3D 3]

I added M302 as a start code to the extruder 2... But didn't work...

[tinkergnome 926]

I added M302 as a start code to the extruder 2... But didn't work...

You only talked about Cura so far, so first things first: you need to install a firmware for 2 extruders... In case of Marlin this also needs (at least) a second temperature sensor. I've not tried it, but the temp sensor can perhaps be "faked" by using a resistor instead (would be cheaper... and is probably safe as long you don't install the second heater).

In short - a bit more tinkering is necessary to get it to work.

[Erkan3D 3]

I added M302 as a start code to the extruder 2... But didn't work...

You only talked about Cura so far, so first things first: you need to install a firmware for 2 extruders... In case of Marlin this also needs (at least) a second temperature sensor. I've not tried it, but the temp sensor can perhaps be "faked" by using a resistor instead (would be cheaper... and is probably safe as long you don't install the second heater).

In short - a bit more tinkering is necessary to get it to work.

Solved with a similar way. Thanks. Case closed

[theoross 0]

hi, 

What did you do to solve this issue??

[Erkan3D 3]

On 13.02.2018 at 3:04 PM, theoross said:

hi, 

What did you do to solve this issue??

I used a firmware for 2 extruders and also connected a temp sensor. I had one stuck with the original nozzle and I used it.