Finding perfect center?

[pixelObsession]

Hey everyone,

I've just found out the hard way how not to find perfect center of a piece of wood...

I'm building a mount for an auto rotating lcd and using a 6" lazy susan bearing.  I had the center of the wood drilled out - it held the pin for my router circle jig.  But when it came time to mount my servo horn something got off center and I couldn't cover the 90 degrees needed.

How can I be sure the bearing and horn are in alignment?  Or is a susan bearing my pitfall?

Thanks!

pO


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[BadMouth]

If it held the pin for the jig you used to cut the circle, I don't get how it could be off.

something got off center and I couldn't cover the 90 degrees needed

Also don't quite follow what you mean by that.

Did you try drawing lines from the centers of the lazy susan bearing mounting holes?

I assume you're using this type:


and not this type:


The 2nd one isn't really designed to be used vertically.  The weight will be resting on the stamped joint in the middle instead of the bearings.
It might make the turning harder for a servo.

Not sure if it's relevant, but also keep in mind that the VESA mounts on the back of a monitor are rarely centered.

[pixelObsession]

Hey BadMouth,

Yeah, as suspected I'm using the bearing posted in the second pic... When the weight of the monitor was added, it was pulling down and causing my issue.

Now to find the recommended bearing in Canada...

pO


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[lordjackenstein]

CAn you cut the piece to where the center is your cut?