Flat Spot in Conduit

Mostly Printed CNC - MPCNC Advice
1

I’ve searched and found mention of the flat spot in EMT (the seam where it’s welded) needing to be reoriented for better operation but haven’t found mention 0f a preferred method of its alignment during assembly? I’m also curious if drilling the Z rails on the flat spot may be good, bad, or indifferent?

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Hi Paul,
As long as the bearings are not running on top of the “Flat spot” you will be fine.
For the Z axis, that is exactly what I did.

Gustavo

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Thanks! I’m assembling parts now but at first glance it looked to me as if putting the flat spot on the bottom would work? And I guess I’ll go ahead and drill the Z rails on the flat spot.