TAZ5 Flexystruder Fail

Hi,

Since I bought the Flexystruder, I tried it for my first time. And impossible to print something…

Second try, third,…, always with the ini profile but I reduced the speed to 8 for all the print (like the first bottom layer) => bad. I reduced the speed manually to very very slow and add amount of extrusion to 140%, ok for the first few seconds the print seems to be better then rapidly everything becomes bad again.

as you can see (right to left)
http://hpics.li/23b5636

What happens ?

I see the wheel of the extruder " jump" (or comes back) very quickly and all the times, even if the print is in straight line (so no filament retraction needed…)
I’ve made a video of the wheel :

https://youtu.be/adEYfTLzqR8


If anyone can help me…

Thanks.
G.