02-16-2016, 11:37 AM
There's a gotcha in using them. Depending on the type, the tail must be either tangent or parallel to the ways if you're looking for accuracy. The pic shows a head being set to 45 degrees.
Note the vertical position of the dial indicator as it measures the rise on the chuck face when the table travels side to side. Exactly 90 degrees to the ways/table, not the chuck. If it were tangent to the chuck face, the indicator would only show half of the actual rise.
Note the vertical position of the dial indicator as it measures the rise on the chuck face when the table travels side to side. Exactly 90 degrees to the ways/table, not the chuck. If it were tangent to the chuck face, the indicator would only show half of the actual rise.