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Voron V2 Gantry Squaring |
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Poor gantry squaring can cause a number of problems, such as:
- First Layer issues
- Z belts rubbing against the gantry's printed parts
- X axis to be "racked" at the front but not the back (or vice versa)
Steps 14-16 of the instructions below can also help with gantry stability.
Watch this video.
Notice that the idlers get "pinched" when moving the X extrusion back/forth (this is shown with loose Z joints).
💡 Some have found 📄 Z Locks to be useful for this procedure. They are not required, however.
-
Enter this g-code:
SET_IDLE_TIMEOUT TIMEOUT=99999
- This arbitrarily high timeout just gives us time to work. We need the Z motors to be energized and holding for the whole process.
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G28
, thenQUAD_GANTRY_LEVEL
. -
Jog your gantry to the center of the build volume using the LCD or web interface.
- This will give you space to work. You need easy access to both the bottom and top of your gantry.
-
Turn off ONLY your A/B motors using these g-codes:
SET_STEPPER_ENABLE STEPPER=stepper_x ENABLE=0
SET_STEPPER_ENABLE STEPPER=stepper_y ENABLE=0
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Loosen your A/B belt tension fully.
-
Take off your side panels.
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Unscrew and drop your lower Z joints.
-
PARTIALLY loosen all connections to the extrusions.
- You need all of these bolts to be loose enough to freely adjust against the printed part on the extrusions.
{: .warning }
Where there are Z belt clamps, ensure that you do not loosen the bolts so much that the Z belts release. Only loosen enough to allow for adjustments.
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X/Y joints (repeat for both sides).
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A/B joints (repeat for both sides):
-
Front idlers (repeat for both sides):
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And now, what we have been preparing for.
Adjust your gantry so that it sits perfectly on top of the lower Z joints.-
This involves moving gantry components further apart or closer together along the extrusions:
-
Your gantry should align so that:
-
Ensure that you do not inadvertently rotate your A/B joints during this process.
-
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Tighten every extrusion bolt again, except those in the X/Y joints. (you will tighten those during step 12)
- Ensure that your Z joints still align properly. Sometimes tightening can move things around.
-
Re-install your lower Z joints and lightly tighten the M5 bolts.
- Don't fully tighten them down yet - just lightly. The joint should still be able to articulate freely.
-
Follow 📄 Nero's de-racking video.
- Make sure to come back here afterwards! The following steps are still important.
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📄 Re-tension your A/B belts (to 110hz over a 15cm span).
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Reinstall your panels and fully heatsoak your printer for 1½ - 2 hours minimum.
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QUAD_GANTRY_LEVEL
3-5 times to "settle in" the gantry (and level it for the next step).- If you are getting new tolerance / retry errors, you may have left your Z joints a bit too loose. Try tightening them up just a bit more.
-
Open the front door and fully tighten the M5 bolts in your Z joints while it's still hot.
- This does two things:
-
Somewhat "locks in" your QGL at its state in full thermal expansion.
- This can help with first layer issues.
-
Stabilizes your gantry.
-
If you have your Z joints too loose, you might notice that your gantry displaces back & forth a bit while printing.
-
This can help with ringing and layer consistency.
-
-
- This does two things:
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RESTART
to reset your idle timeout.