Example Using Start Thread Angle Q

Classic Control - Lathe Operator's Manual

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G92 X-1.99 Z-2. Q60000 F0.2 (60 degree cut) ; G92 X-1.99 Z-2. Q120000 F0.2 (120 degree cut) ; G92 X-1.99 Z-2. Q270123 F0.2 (270.123 degree cut) ;

The following rules apply to the usage of Q:

  1. The start angle, Q, must be specified every time it is used. If no value is specified then a zero (0) angle is assumed.

  2. The angle of threading increment is 0.001 degrees. Do not use a decimal point in the entry; for example, a 180° angle must be specified as Q180000 and an angle of 35° as Q35000.

  3. The Q angle must be entered as a positive value from 0 to 360000.

In general, when multi-threads are being performed it is a good practice to achieve the depth of the threads at a uniform level across all the threading angles. One way to achieve this is to make a sub-program that only causes the Z-axis to move for the different angles of threading. After the sub-program has finished, change the X-axis depth and call the sub-program again.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.