| abstract |
A numerically controlled machine tool in which dimensional information is programmed with reference to a cutting tool centerline, or with reference to a cutting tool of standard dimension, provision being made for correcting such dimensional information by means of a position offset facility coupled to the numerical control so that dimensional information is modified in a sense to provide an indication of a desired position that accommodates a specific cutting tool dimension or other offset requirement, circulating register means being provided for circulating data with respect to a plurality of axes, and common arithmetic circuitry serving to process the data for the respective axes as the data circulates from the circulating register means through the common arithmetic circuitry. |