BobsCNC E3, Assembly Manual, Page: 28 / 90

Page 28
Step 10
Attach Z - Drive to Y Carriage. Slide Z - Assembly Bearings over
the Z - Rails.
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DO NOT FORCE! The SG20U Bearings should roll firmly. There should be a small
amount of preload. If the Z Assembly doesn
’ t gently of slide onto the rails or if the
assembly sets loosely on the rails:
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Remove the Z - Assembly from the rails.
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Loosen the 2 nuts on the slotted holes and slide the bearings inward.
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Snug the bearing nuts.
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Repeat Step 11 above
Check all four bearings to ensure that they are snug up against the rail.
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