TH check – Definition from CNC Dictionary

Checking whether the total number of characters in a block (starting immediately after an end–of–block code and ending at the next end–of–block code) is even or odd.

Setting a forbidden area in the CNC for a tool, decelerating the tool to a stop, and issuing an alarm if the tool is about to enter the forbidden area.

Stroke limit check performed before the movement specified in a block is started.

The brand name for Siemens numerical controls.The name of the organizational unit of Siemens that designs and manufacturers numerical controls.

Program that can be called repeatedly by the control section of another program.

Shifting a specified tool along the controlled axis.

A machine tool which does primarily turning, but which has live tooling (a spindle on the turret) for doing milling operations. From a software point of view, a turning center…

Offset value used by the tool length compensation, cutter compensation, and tool offset functions.

The part of a tool offset value used to compensate for tool wear.

Retracting a tool from the workpiece, allowing the tool to be exchanged during machining (if broken) or the state of machining to be checked, and subsequently repositioning the tool to…

CNC memory used to store tool offset values.

Number preceded by the H or D address to specify a tool offset value.

Manual operation in which a reference tool and the tool to be measured are pressed against a fixed point on the machine, one after the other, and the difference in length between…

Compensating for the difference in length between the tool assumed during programming and the tool to be used for actual machining.

See “Stored stroke check”