Feeder Motor

[minivipers 25]

Hello all,

my existing motor problem only occur while I was changing material but printing process, it works fine...

https://www.facebook.com/selcukfindik/videos/10154204413679191/

I think my feeder motor is not suitable...While I was building my ultimaker 2, I had chosen Pololu SY42STH47-1206A (I did not pay attetion at all ). however, its 6 leads and 4v voltage rate.

there are 4 types of "SY42STH47" motors ( http://reprap.org/wiki/NEMA_17_Stepper_motor )

and I need to know suitable version for feeder motor?

SY42STH47-1504A or SY42STH47-1684A / B

there are difference between Holding Torque and motor lenght...

Which one I need to choose?

[Dim3nsioneer 558]

47 is the motor length. 168 stands for 1.68A which is the one that UM uses. However, the first two letters stand for the manufacturer, so you can have anything there.