Wandering mill table

[Steve355Participant @steve355]

Posted by Pete Rimmer on 24/10/2021 22:29:41:

If the table is rotating simply from turning the handle either the ways are worn or the leadscrew is bent. It's also possible that the leadscrew nut is machined slightly too tall and the bed is riding on the leadscrew somewhat. Check for a bent leadscrew by turning it slowly by gripping the wheel not the handle. If it's bent it will move your dial regardless of how it's turned.

Thanks Pete

I’ve examined the lead screw and it isn’t obviously bent, but I will take another look.

there is a stiffness in the handle that always occurs in the same place in the turn. I think that whoever is causing it, is related to that,

cheers

Steve

[Howard LewisParticipant @howardlewis46836]

If you grip the ends of the table, and can wobble it back and forth, the gibs are not set correctly.

I would expect the gibs to be trapezoidal in section, Wide faces at an angle to matc h the dovetails, but with the narrow faces horizontal, and not fouling on any other part, with the adjusting screws engaging in the dimples.

Ideally, the gibs should be adjusted with the leadscrew disengaged. (Removed? )

If the table gibs can be adjusted so that it moves smoothly, but with absolutely minmial slack, but it tightens when the leadscrew is fitted you need to investigate the leadscrew and the nut, Possibly as suggested the nut is out of place in some plane.

HTH

Howard

[Tony Pratt 1Participant @tonypratt1]

Howard, the Dore Westbury mills do not use dovetail slides, they are just plain bars.

Tony

[Steve355Participant @steve355]

Posted by Tony Pratt 1 on 25/10/2021 15:48:38:

Howard, the Dore Westbury mills do not use dovetail slides, they are just plain bars.

Tony

That’s right, and also they have an aluminium tray at the end which is nothing like as solid as the cast iron. This provides a very long lever arm to wobble the table laterally.

[Pete RimmerParticipant @peterimmer30576]

Posted by Steve355 on 24/10/2021 23:08:18:

Thanks Pete

I’ve examined the lead screw and it isn’t obviously bent, but I will take another look.

there is a stiffness in the handle that always occurs in the same place in the turn. I think that whoever is causing it, is related to that,

cheers

Steve

That can only be a bent or poorly manufactured screw.

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