Mounting the MK8 extruder in Acrylic I3 pro B

[abulafi]

I recently bought the Acrylic Prusa I3 pro B and cannot figure out the right way to mount the MK8 extruder on the extruder bracket.
The online wiki says that the M4 nuts have to go in between the aluminum plate (No 65) and the plastic support. This is confusing as the M4x16 screws are a little tall and the screws have to be tighten either towards the plastic support or to the aluminum plate, and both ways seems to be wrong.

This image from the assembly guide does not show clearly how to fix the M4 nuts:

Extrudersupport.png (48.3 KiB) Viewed 13693 times

I wish someone post a picture taken from a different angle of this image as it seems there is no spacing between the blue support part and the aluminum plate:

500px-Extruder_bracket.jpg (20.52 KiB) Viewed 13693 times

Appreciate your help.

[zhangxueyou]

Is this picture clear?

QQ截图20150317133739.png (697.09 KiB) Viewed 13690 times

[abulafi]

The picture is clear but it seems that there are no M4 nuts between the aluminum plate and the blue support part, right?

[zhangxueyou]

I am so sorry that we updated the extruder bracket but we did not update our wiki because of our careless job.
The type of the screw is M4 X12.
Sorry again for wasting your time.

[thegman]

The screws that are in the instructions are too long. Mine cracked the fan chassis before I realized it. I then used some of the M4 washers between the screw head and the extruder mount as a spacer.

Then I made one of these http://www.thingiverse.com/thing:729961.

[zhangxueyou]

Hi, thegman
I am sorry for your trouble. But we just updated our wiki.
And thanks for your post.