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Ch 06 › Part A — Chapter 06: Z axis (mechanical)9 / 42

Step 06.9 — Fit the four lower Z joints to the Z carriages

Step 9 of 42 · Chapter 06 — Z axis (and Chapter 06b — Gantry squaring)

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gather Gather for this segment — steps 06.9–06.10 (~25 min)

Fasteners, Tools & Misc box

  • M3×20 SHCS ×16

The Z rails

  • Rubber rail stopper ×4

Printed parts

  • z_joint_lower_x4 ×4 · bin 06-Z-joints

Already on the bench

  • the four z_rail_stop_x4 on the rail tops, if fitted · bin 02-Z0, 02-Z1, 02-Z2, 02-Z3

Parts:

  • z_joint_lower_x4 ×4 · bin 06-Z-joints
  • M3×20 SHCS ×16 · Fasteners, Tools & Misc box

Do: Bolt one z_joint_lower to each MGN9 Z carriage with four M3×20 SHCS, driven horizontally into the carriage's tapped face. The domed top with the central bore faces up. Tighten evenly, corner to corner, firm.

check Check

All four joints sit flat on their carriages at the same rotation, and each carriage slides a few centimetres clear of the rail screws.

What you're looking at

The z_joint_lower is the other half of each Z joint: it bolts sideways onto the MGN9 carriage riding the upright's Z rail, and its domed top is what the gantry's bearing block lands on. Four M3×20 per corner and no fewer.

Caution

Rev D+ / LDO: This page (and p.116) is done before the gantry install on p.114, not after. LDO: "We recommend completing steps on page 115-116 then use the rubber rail stopper under the Z joints mid rail. This will allow you to set the Gantry on page 114 on the joints without the need for long zipties." src

Source: Voron manual p.115 · LDO Build Notes § Voron 2.4 build FAQ · Video: Part 4 @0:58:18

← PreviousStep 06.8 — Repeat at all four corners

Next →Step 06.10 — Park the four lower joints at a matched height