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Dual extruders on ramps 1.4

Posted by nsozan 
Dual extruders on ramps 1.4
November 19, 2014 02:08PM
Hello, im wondering how people run dual extruders on a ramps 1.4? since an extra extruder will add a 6th stepper motor?

-Andreas
Re: Dual extruders on ramps 1.4
November 19, 2014 02:48PM
Hi, I put four extruders with ramps 1.4 without adding steppers. With my marlin and a card to 8 relays can control up to four extruders with only two drivers.
Otherwise you can mount another external driver taking three free pins to control it.


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Re: Dual extruders on ramps 1.4
November 19, 2014 04:36PM
Hi Andreas. The ramps board is already set up to allow for two extruders. E0 is your first extruder, and E1 is your second extruder. I use marlin firmware, and in the configuration.h file you control how many extruders you have, using the following (at line 65 in mine):

#define EXTRUDERS 2

You then need to use a slicing program that can also handle two extruders. I use slic3r and it works great. You can use one extruder for filament, and the other for support material, or use a different color filament in each extruder. I usually use two different colors so I can get multi-color parts.


Anita
3dbotshack.com
Re: Dual extruders on ramps 1.4
August 09, 2016 08:18PM
Hello everyone,
Could you please attach you configuration h file for the dual extruder set up for the 3d printer. I will be very thankful to you.
Thank you very much.
Re: Dual extruders on ramps 1.4
August 10, 2016 07:57AM
i will post if you really want, but the two main things are these lines:

\\these change your board to recognize it has two hotends and a heated bed rather than a hotend, a fan and a bed
#ifndef MOTHERBOARD
#define MOTHERBOARD BOARD_RAMPS_14_EEB

\\simple stating you have two hooked up
#define EXTRUDERS 2

\\the distance between your two nozzles, in my case its 30 mm on the x axis, the first extruder is 0,0
#define HOTEND_OFFSET_X {0.0, 30.00

and dont forget your thermister for your second hotend
Re: Dual extruders on ramps 1.4
August 20, 2016 08:27AM
I tried with it but its not working . Please post the file.
Thank you very much
Re: Dual extruders on ramps 1.4
August 24, 2016 06:59PM
there ya go
Attachments:
open | download - Configuration.h (52 KB)
Re: Dual extruders on ramps 1.4
September 07, 2016 05:56AM
thank you very much for posting the file, i will try with it.
thank you very much once gain.
Re: Dual extruders on ramps 1.4
February 05, 2018 11:46PM
Quote
DaGameFace
i will post if you really want, but the two main things are these lines:

\\these change your board to recognize it has two hotends and a heated bed rather than a hotend, a fan and a bed
#ifndef MOTHERBOARD
#define MOTHERBOARD BOARD_RAMPS_14_EEB

\\simple stating you have two hooked up
#define EXTRUDERS 2

\\the distance between your two nozzles, in my case its 30 mm on the x axis, the first extruder is 0,0
#define HOTEND_OFFSET_X {0.0, 30.00

and dont forget your thermister for your second hotend

Does this imply that I have to give up something like bed heat if adding E1, or is #define MOTHERBOARD BOARD_RAMPS_14_EEB just a good starting point to get all this working?
Re: Dual extruders on ramps 1.4
February 06, 2018 03:22AM
On a ramps you have 3 mosfet

so you can turn on 3 devices

Pick any 3:
fan
hotend 0
hotend 1
heated bed


Its easy to add more mosfets, but then it starts getting non standard as to how they are connected.
So you need to make custom pin files...
Re: Dual extruders on ramps 1.4
February 06, 2018 04:47AM
Quote
MagoKimbra
Hi, I put four extruders with ramps 1.4 without adding steppers. With my marlin and a card to 8 relays can control up to four extruders with only two drivers.
Otherwise you can mount another external driver taking three free pins to control it.

Would like to see how you did this
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