[philbur]

Here is another video on gib adjustment, its for different machine but its different approach:


I have tried this and adjusting gibs this way results in out of spec lost motion i.e. 0.00311" when manual recommended way to adjust gibs yield less than 0.0018"

I have also experimented with getting Y gib tight so it stops this wobble. Its possible (still shades of wobble visible), but results in lost motion greater than 0.0031"

I have new Y ball screw on the way from Tormach. I will replace that, adjust gibs per manual and see what happens.

You can get away with this simpler procedure on a manual mill but it is not suitable for a CNC mill. A manual machine with a lead screw rather than a ball screw will always have some lost motion so having the gibs a bit to tight makes little difference. The machinist will allow (or should) for this lost motion in the way that he uses the machine. Operator allowance is not always possible with a CNC machine, for example interpolating a round hole.

Phil