1 Topic by titaniadioxide

  • titaniadioxide
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  • Registered: 2014-06-10
  • Posts: 37

Topic: Motor shaft spinning in socket

I'm part of a 3D printing research group, and we inherited a Filastruder (number 531) from last year's research group.  Unfortunately, it was broken when we inherited it.

What was broken was the socket connecting the motor shaft and the auger.  When we replaced it and the washer, we expected it to work properly, but after less than an inch of extrusion, the motor started spinning inside the socket, and it actually bent the washer, rather than catching and spinning the auger and extruding.

As of right now, we're going to take a thicker washer and hope that works, but it was really hard to take the socket as is, and if it doesn't work, we're worried about being able to get it off.  Do you have any suggestions?  Also, is the tape actually necessary?  It was pretty darn snug when we put it on and took it off.

Thanks in advance!

2 Reply by elmoret

  • elmoret
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  • Registered: 2012-10-11
  • Posts: 6,048

Re: Motor shaft spinning in socket

The washer (or dowel pin) is stall protection. If it is slipping, then either too thin of a washer is being used, or the motor is being overloaded (typically from not waiting for the plastic to melt in the barrel before turning on the motor). 2-3 wraps of tape are used to provide compliance for misalignment.

This has been discussed several times on the forum.

Filastruder - the robust, inexpensive filament extruder
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