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Arbitrary Speed Threading Using FANUC CNCs


The pipes used in the oil and gas industry sometimes need maintenance and repair. Previously machined threads can be easily repaired using arbitrary speed threading.

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Re-machining a thread is a simple 3-step process

Step 1: Load the damaged part into the machine.


Arbitrary-Speed-Threading-step1_500x175

Step 2: Manually positioning the tool into the machined thread with the spindle stopped and then registering the position with the CNC.


Arbitrary-Speed-Threading-step2

Step 3: Retract the tool, start the spindle and run the part program to re-machined the thread.


Arbitrary-Speed-Threading-step3



Arbitrary speed threading also provides the advantage that the spindle speed override can be used during threading to allow the operator to adjust the spindle speed to avoid chatter. The CNC maintains feed axis synchronization to assure thread definition. M-code activation ensures existing part programs work as expected.


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