Frame, Step 14: Y axle

Mounting the Y axle starts from back left side. Start pushing the long tube (green for illustration) towards the motor and while doing that, put the parts on it in the indicated order. Please note, that the illustrations show the end result; when starting, the long end of the tube is on right side in the first picture.

On left back corner:

Frame step14

  1. Y axle tube
  2. SCCN8-6 shaft collar, narrow side to the bearing (push tube from the thicker side)
  3. 608ZZ flanged bearing, flange outside the Y pulley subassembly
  4. GT2-20 pulley, 8mm bore; note the orientation
  5. 608ZZ flanged bearing, flange outside the Y pulley subassembly
  6. SCCN8-6 shaft collar, narrow side towards the bearing

On the middle support plate:

Frame step15

  1. 608ZZ flanged bearing
  2. SCCN8-6 shaft collar; narrow side towards the bearing

At the motor:

Frame step16

  1. SCCN8-6 shaft collar, narrow side towards the bearing
  2. 608ZZ flanged bearing
  3. GT2-20 pulley, 8mm bore; note the orientation
  4. 608ZZ flanged bearing, flange inside the Y pulley subassembly
  5. SCCN8-6 shaft collar; narrow side towards the bearing

Push the tube to the coupler, less than half-way through. You don’t what the motor and the tube ends to touch. Ensure free rotation of the shaft. Tighten the shaft support structure roughly but not precisely midway between the two ends. Ensure free rotation again. Tighten the set screws on the coupler, and get a feel how easy it is to rotate now, when the motor is connected. Also tighten the set screws on shaft collars (they hold the bearings in place), but don’t tighten the pulley screws yet.

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