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Adding another stepper motor

Posted by tribalmadness 
Adding another stepper motor
April 04, 2013 12:45PM
Hi there reprappers

I have been given a Prusa Mendel (aready assembled and working) in university which is driven by a Sanguinolulu board, and have been given the task to design a rotating part that is driven by a stepper motor (its movement is independent of the axes' and the extruder's motors). I am not entirely sure if it is possible to use the current Sanguinolulu board or if I will need another controller. I have access to an Arduino UNO and EasyDriver, which I could presumably just hook up and use to control the extra stepper motor, although ideally I'd want this motor to be controllable from within the same printer interface (printrun) and if there is a possible way of doing it without using the Arduino UNO that would be great. This is the one I'll be using if that will make any difference.

As you may be able to tell, I have very limited knowledge, but pointers in the right direction would be really appreciated as I found the amount of info on the internet to be slightly overwhelming and the time-frame I am working with is somewhat limited.

Thanks in forward, and apologies if this is in the wrong section/forum.
Re: Adding another stepper motor
April 04, 2013 07:27PM
Sanguinololu has an extension header towards the bottom of the board, between the ISP header and the endstop headers. The extension header has more than enough pins to drive an additional stepper driver. The electronics side of this is fairly straightforward.

The firmware side may be harder, depending on what you want to accomplish with this additional stepper.
Re: Adding another stepper motor
April 06, 2013 03:36AM
could this be done with a ramps as well or no?
Re: Adding another stepper motor
April 06, 2013 12:08PM
RAMPS has a huge number of spare pins to work with, its ideal for this kind of further development.
Re: Adding another stepper motor
April 07, 2013 03:59AM
Andrew Smith Wrote:
-------------------------------------------------------
> RAMPS has a huge number of spare pins to work
> with, its ideal for this kind of further
> development.


so has anyone done this or does anyone have a tutorial, ive got an extra driver that id like to hook up a 3rd extruder to.
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