I cracked my self-designed extruder arm on my heavily modified @Printrbot Simple, so I had to wire it together to try and print another. 100% fill this time. Wish me luck.
It’s always weird seeing someone with my old profile picture
Haha I had the same thing happen with my smartrap super early on. I got it printing over the Christmas holiday and didn’t have access to the printer that made its parts at the time. The extruder was such low infill that it broke immediately. I just zip tied the bearing in its holder to the z rod and printed a new extruder. Fun times
Print two before trying one 
Good news! Prints came out perfectly. Now to swap the broken one out for the new (hopefully stronger) one.
with a arm extruder it is possible to really print in 3d
not only 2d layer one by one
@christophe_malvasio
Uhhh… what?
@Carlton_Dodd
a arm have axes to move in 3d
a normal extruder is 90° of the print bed
a arm extruder add more freedom to directly print in 3d while a fixed 90° can only make a 3d object one layer at a time (2d)
@christophe_malvasio
And, that relates to this post… how?
@Carlton_Dodd
“self designed extruder arm”
unless it heat plastic with arm cpu
or it is designed with a arm
this not a arm extruder : forgive me
@christophe_malvasio
Correct, it is not an “arm extruder”, it is an extruder arm. I suppose it could also be called a lever.