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Vertical Belt Pulley Replacement Instructions: All Current CMC Models

Vertical Belt Pulley Replacement Instructions: All Current CMC Models

Owned by dani.simmonds
Last updated: yesterday at 9:54 pm
4 min read

  • Replace the Vertical Belt Pulley when the Gantry Vertical Belt Pulley visibly wobbles when the Head travels up/down the Gantry.

  • Reset the motors by clicking the Reset Motors Button on the FrameShop software.

  • Remove the lower Gantry Cover by removing the screw holding it in place.

GantryCoverOffZ18k800.png
Remove the Gantry Cover

  • Pull the Head about halfway up the Gantry, and use a piece of matboard under the Head Wheel to wedge it into place.

Use a Piece of Matboard Under the Wheel to Wedge it into Place

  • With an 1/8” Allen wrench, loosen the Vertical Belt Tension Screw on the bottom of the Gantry near the screw that holds the Vertical Belt Pulley in place.

Loosen the Vertical Tension Screw on the Bottom of the Gantry

  • Press the lower Vertical Belt Pulley upwards to reduce the tension then tighten the Vertical Belt Tension Screw.

  • Make sure that the Vertical Belt Tension Screw is tight

Press the Lower Gantry Pulley Upwards to Reduce the Tension Then Tighten the Vertical Tension Screw

  • Loosen and remove the 1/8” Allen Screw that holds the Vertical Belt Tension Pulley in place.

Loosen and Remove the 1/8” Allen Screw That Holds the Gantry Pulley in Place

  • Pull the Vertical Belt Tension Pulley upwards and remove it from the Vertical Belt.

Pull the Pulley Upwards and Remove it From the Toothed Belt

  • Insert the replacement Vertical Belt Tension Pulley into the Vertical Belt and push back down into the Vertical Belt Tension Pulley bolt spacers.

Insert the Replacement Pulley into the Toothed Belt and Push Back Down into the Gantry Pulley Bolt Spacers

  • Reinstall the 1/8” Allen Screw that holds the Vertical Belt Pulley in place.

Reinstall the Allen Screw That Holds the Gantry Pulley in Place

  • Loosen the 1/8” Allen Vertical Belt Pulley Tension Screw.

  • You will see the Vertical Belt Pulley spring downward as pressure is applied.

Loosen the Vertical Tension Allen Screw

  • Make sure that the Gantry Pulley Bar is leaning forward by pulling it toward you.

Make Sure That the Gantry Pulley Bar is Leaning Forward by Pulling it Toward You

  • The Vertical Drive Belt should lie just above the Gantry channel, and not against it.

The Toothed Belt Should Lie Just Above the Gantry Channel, and Not Against it

  • If the Gantry Pulley Bar is leaning too far back, the Vertical Drive Belt will rub against the Gantry channel and make a lot of noise as the Head moves up and down the Gantry.

  • With the Gantry Pulley Bar in the forward position, tighten the Vertical Belt Pulley Tension Screw to lock the tension into place.

With the Gantry Pulley Bar in the Forward Position, Tighten the Vertical Tension Screw

  • Remove the matboard holding the Head in place and move the Head up and down the length of the Gantry to make sure the Vertical Drive Belt is unconstricted.

  • If the Vertical Drive Belt is hitting the inside of the Gantry, repeat the last four steps.

  • Reinstall the Gantry Cover(s), replacing the screws you removed earlier.

GantryCoverOnZ18k800.png
Replace the Gantry Cover

 

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