Numerical controller with inter-path waiting function

A numerical controller with an inter-path waiting function, having at least two control paths each sequentially pre-reading and analyzing each block of a machining program recorded in a memory or external storage means, the numerical controller comprising:

• a code analysis section analyzing a loaded block to create code analysis data;
• a function code determination section that determines a function of the created code analysis data;
• an execution data creation section creating execution data for carrying out the function determined by the function code determination section;
• a pre-read/analysis suspend section suspending the pre-read/analysis process when the function code determination section determines that the block contains an inter-path waiting code;
• a specified condition judgment section checking an execution state of a block immediately before the block containing the inter-path waiting code with the pre-read/analysis process suspended by the pre-read/analysis suspend section, to judge whether or not a specified condition is met which specifies a condition for carrying out inter-path waiting commanded in the block containing the inter-path waiting code;
• an inter-path waiting section allowing suspension of the machining program for a control path targeted for the inter-path waiting commanded in the block containing the inter-path waiting code when the specified condition judgment section judges that the specified condition is met, and
• an inter-path waiting discard and resumption section determining the inter-path waiting to have been established when the inter-path waiting is carried out by the control path targeted for the inter-path waiting, using the same inter-path waiting code, discarding code analysis data created before the pre-read/analysis process is suspended, and immediately pre-reading the machining program from a block succeeding the block containing the inter-path waiting code to start a pre-read/analysis process.