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Installing Lower Z-Limit Switch

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In Progress

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(IN PROGRESS) This guide will install the Z-Limit switch on the lower part of your Gigabot. This limit switch will allow protection to overextension of the z-axis and protection of bottoming out the bed.

Edit Step 1 Intro  ¶ 

Edit Step 1 Intro  ¶ 

  • This procedure is to install the Z-limit switch on a fully assembled Gigabot.

Edit Step 2 Remove leveling block  ¶ 

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Edit Step 2 Remove leveling block  ¶ 

  • Remove leveling block on the back left side of the bed, by removing two M5x12 screws that attach to the left bed side plate.

  • Detach the leveling block from the bed side plate with the entire assembly intact (see photo). Set aside leveling block assembly.

Edit Step 3 Replace leveling block  ¶ 

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Edit Step 3 Replace leveling block  ¶ 

  • Replace the existing leveling block with the supplied Limit Switch Leveling Block (L-shaped version.

  • Ensure new assembly looks like photo.

Edit Step 4 Re-install Leveling Block  ¶ 

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Edit Step 4 Re-install Leveling Block  ¶ 

  • Install the M5x45 screw (lightly tighten).

  • Install the M5x12 screws as shown. Tighten.

  • Ensure the M5x45 is straight, then tighten against the bed rail.

Edit Step 5 Install other M5x45  ¶ 

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Edit Step 5 Install other M5x45  ¶ 

  • Place M5x45 screw into outer side of Limit Switch Leveling Block.

  • Ensure screw head is inserted from bottom, and nut is below leveling block.

Edit Step 6 Install Z-limit Switch  ¶ 

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Edit Step 6 Install Z-limit Switch  ¶ 

  • Install the Z-limit switch by placing the two M2 screws (from the outside) through the side plate, white spacer, limit switch, lock washers and nuts provided.

Edit Step 7 Route Wiring  ¶ 

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Edit Step 7 Route Wiring  ¶ 

  • Install small length of shallow panduit to bed side plate.

  • Connect the red wire to the middle of the limit switch.

  • Connect the black wire to the pivot end of the limit switch.

    • Note: Polarity of wiring does not matter for limit switches. The normally open circuit is closed when contact is made.

  • Route wiring through installed panduit, existing panduit, and through an open grommet in the electrical box.

  • Connect red and black wires to the Z-max connectors on the Azteeg (red in middle of 3, and black on far right), as shown.

    • Note: Viki cables are not connected in photo. There is no need to disconnect Viki cables in this procedure.

  • Close electrical box and panduit.

Edit Step 8 Install firmware to support +Z-limit switch  ¶ 

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Edit Step 8 Install firmware to support +Z-limit switch  ¶ 

  • (see wiki steps - Patrick to add?)

Edit Step 9 Level the bed  ¶ 

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Edit Step 9 Level the bed  ¶ 

  • Screw in M5x45 to its upmost position.

  • Use existing bed leveling procedure to bring bed to just above Z-motors.

  • Command Z-motors approximately 5mm up above Z motors.

  • Unscrew M5x45 so that it contacts and trips limit switch.

  • Home Z axis as per leveling procedure.

Conclusion

Have questions? Need help? Email support@re3d.org

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