Is this a better extruder tensioner screw?

2013-08-15T20:26:58Z

The standard screw wants to pull through the thin material in that area of the MK5 extruder assy This new scrrw has a slightly wider (hex) head to solve that It also has a more snug spring. Its my opinion that the sloppy stock spring cocks at an agle, exerting lateral pressure on the screw, making it want to push sideways out of the pocket where it lives and off the end of the tensioner arm. At least, it seems possible and anyway, sloppy ain't professional. So the new springs slides snugly over the new screw for perfect linear compression.

I got these parts at True Value Hardware and had to switch to SAE since none of the 3MM cap screw had a hex head.

Bill of material:

1 - 6-32 x 1.25" hex head cap screw
1 - 6-32 wing nut
2 - No. 6 flat washers (I chose nylon to help prevent loosening of the wing nut under vibration)
1 - No.1 compression spring This was the smallest compression spring they had and was exactly twice as long as I needed so I snipped it in half.

The new screw has to be pressed down (vertcally) into the head pocket in the Mk5 and does not want to swivel up to release the tensioner arm, since it is a snug fit. So, short of modifying the MK5 and reprinting it, I will just unscrew the wing nut and remove the spring to release the tensioner arm.

Perhaps we need to consider a new mod for the MK5 for this improved screw, also with a built in version of 2N2DS's 1/4" guide tube between the extrusion wheels and the extruder intake orifice to prevent filament kinking in that area.

Respects

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Is this a better extruder tensioner screw?