Stepper Motor Belt Tensioner

by Silverfire56, published

Stepper Motor Belt Tensioner by Silverfire56 Dec 21, 2012
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2502Views 370Downloads Found in 3D Printer Parts


Confirmed to fit on both X and Y axis of a Thing-O-Matic 3D printer.


  • Lowered the thickness to not interfere with bolts on the X axis.
  • Reduced side thickness to not interfere with X axis walls.
    • M4 tensoner screw

Version 2- Cleaned the file up and added slightly more material to improve the strength of the part.


  • Print out object at a high infill (i used 60%)
  • Ensure hole sizes are correct, drilling any holes if required
  • Check that a M4 Bolt fits correctly in the slot
  • Tape the any surfaces in contact with motor sliding with kapton tape to reduce friction
  • Once ensuring that the part does fit, drill a 4mm hole where the Tensoner bolt meets the wall
  • Screw motor in, just tight enough that it still moves by hand
  • Use the tensoner bolt to tension the belt. Remember that the tigher it the belt the the more the stepper motor needs to work.

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