Thread: Tapping head on CNC
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06-02-2019 #1
Just acquired a tapping head, the basics of which I understand. The unit functions nicely on a pillar drill. But when wishing to try it on the CNC mill, there are some ponderables.
The unit does not have an adjustable friction clutch and I am concerned that if I simply programme the feed rate/speed ratio. What happens at the bottom of the thread when the unit is switched from down feed to retract and auto reverses. With a pillar drill the Z axis quill is quite free to absorb the change. But under driven feed on the CNC, during that small moment of change, the Z axis feed must be momentarily static before it reverses. I am assuming, bang goes the tap?
Is there any contingency normally built in the these units that mitigates this problem. I am completely new to this and probably missing something obvious. But if you have knowledge of the process and would share I would be most grateful.
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