[http://dynomotion.com/Software/Patch/AddG84RigidTapV434h/ http://dynomotion.com/Software/Patch/AddG84RigidTapV434h/]
(Note Version 4.34 and later no longer require a Patch)
Note: in order to facilitate feed holds during Tapping the The PC will set the MCode Var to -2 when the operator requests a feedhold while tapping. The C Program that performs the Tap cycle should watch for this and if a -2 is observed pause the tap motion if possible. The PC may then set the MCode to 0 to instruct the C Program to resume the tapping motions.
Update: Version 4.34 and later no longer requires a Patch. Here is a related [https://www.dynomotion.com/forum/archive/Rigid%20Tapping%20with%20G84%20Tap%20cycle.html discussion].
Here is an example C Program update which implements rigid tapping and allows feed hold while tapping: [https://dynomotion.com/Software/Patch/FixFeedholdJustbeforeRigidTap_V434j/RigidTapCycle+M119%20Feedhold%20Rev%206.c RigidTapCycle+M119 Feedhold Rev 6.c]