New build - Steel - 3 Axis initially then conversion to 4 axis.

[Slixxor]

In post #32 the Z bearings are trapped between the fixed distance between the angle iron sections. This means they cannot sit naturally, or have any pre-load control, and you can't adjust it either.

I'm guessing you welded it together with the angle iron bolted to the bearings? If you release the bolts into the Z bearings do they slide out easily from under the Z axis (which is what you want), or does the Z axis 'spring away' or 'close up'? Ideally this should be a nice gentle fit onto the bearings , or possibly have a slight bit of pre-load.

When welded they werent bolted on. Just the outer frame clamped onto both sides with pressure applied. When loosened there is slight rubbing on the bearing blocks but minimal force is required to remove them. If on an angle they scrape and fall straight out. The bearing holes were drilled afterwards with bearing blocks on the rails with no tension. The rear of the bearings were coated with steel blue and the top casing was slid over the bearing blocks creating the guide for my bearing block drilling die I'd made.


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