E Motor Problem

Hi again, last time i posted here i was asking for advice about my first RepRap, i ended up building myself a Prusa i3 Boxed =)
The printer is just great, i finished it 2-3 week ago and i've tuned it day by day, in the end the printing result were realy, realy great.

Now suddendly the E motor has decided to behave strangely, the problem showed up yesterday and i cant find a fix for it, i've searched on this forum and on google but i wasnt able to find anything..
Since i rly dunno how to describe the problem in a decent english i've maked a short video of it --> [youtu.be]

I'm using a Minitronics with marlin as firmware, i've tried to swap the E and X connector on the board and the E stepper moved the X motor fine but the X stepper had the exact same problem with the E motor, so it seems not to be a board problem.
I've tried to remove the pinion from the motor too and nothing changed, so it's not related to the hotend or something else stucked.

This is still mi first RepRap so i'm not that experienced, hope someone here can guide me to a solution!

Edited 1 time(s). Last edit at 11/21/2013 04:57PM by Nova.

Have you checked the wires on the connector going from the motor to the board?

Quote
uncle_bob
Have you checked the wires on the connector going from the motor to the board?

mmm, not rly since all the cable have spiral wrap on them..
Well, i'll unwrap them and check when i get home from the university

One very likely issue - the little crimp on pins in the connector got crimped over insulation on the wire.

Quote
uncle_bob
One very likely issue - the little crimp on pins in the connector got crimped over insulation on the wire.

And now it works, amazing ^^

I've unwrapped the cable and straightened them, checked the connector and changed the cable routing, and it just started working again!
I'll check component by component tomorrow to understand which one failed in the first place, right now i can only thank you very much..

Good printing to everybody and thanks again unble_bob =)

Edited 1 time(s). Last edit at 11/22/2013 01:14PM by Nova.

I'll bet you a warm glass of beer that the crimps on the connector aren't right or that you have a bad solder joint on the controller board.