Changes to Step #13

Edit by Dave Ogles —

Edit approved by Grégoire Saunier

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[title] Z axis squaring
[* 9] Take your time with this step.
-[* 2] Place the ''build_helper_z'' to set the distance from the back of the frame.
-[* 5] Add your square to the assembly and push it in the direction of the ''build_helper_z''.
-[* 7] Tighten strongly the 3x M5x10 screws.
- [* 6] This step can be easier if you have a clamp. You can then secure the thicker side of your square to the bottom extrusion as shown in the 3rd image.
- [* 8] As your clamp might be thick, put the frame on thick part (we use the ''psu_upper_mount'' in our case)
-[* 9] Verify the Z axis is at 90° and repeat this step if necessary
+[* 2] Use the ''build_helper_z'' to set the correct distance, from the back of the frame to the Z axis.
+[* 5] Place your square on the Y axis extrusion, as shown, and push in the direction of the ''build_helper_z''.
+[* 7] Ensure that the Z axis extrusion is perpendicular to the Y axis and fully tighten the 3x M5x10 screws.
+ [* 6] This step can be made easier by using a clamp. You can then secure the thicker side of your square to the bottom extrusion as shown in the 3rd image.
+ [* 8] As your clamp may be too thick to fit under the extrusion, raise the frame on blocks or a plastic part (we used the ''psu_upper_mount'' in the photograph).
+[* 9] Check that the Z axis is at 90° and adjust if necessary
[* 9] Verify that the plates and extrusions are correctly oriented.