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General Mach Discussion / Re: Spindle Speed measurement question
« on: November 23, 2008, 07:08:57 PM »
I am in the UK so I got it from RS Components http://uk.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=opb-917b&x=0&y=0
Yes one pulse per rev is all that is need for threading on the lathe but you said you have a mill so afraid if you are thinking of doing rigid tapping then Mach doesnt support that yet. The SmoothStepper may change that but only time will tell.
Some guys have done rigid tapping on a mill by using the swap axis feature and saying that their spindle is the A Axis and coding suitably for it however you will have to make sure your motor tuning is spot on as any bogging down will screw things up fast.
Also I would think this is only possible with stepper or servo spndle motors and dont think a VFD and induction motor would have the same control but could be worth a try.
Your other option of course is a floating holder for your tap and that should work if you code carefully.
Hood
Yes one pulse per rev is all that is need for threading on the lathe but you said you have a mill so afraid if you are thinking of doing rigid tapping then Mach doesnt support that yet. The SmoothStepper may change that but only time will tell.
Some guys have done rigid tapping on a mill by using the swap axis feature and saying that their spindle is the A Axis and coding suitably for it however you will have to make sure your motor tuning is spot on as any bogging down will screw things up fast.
Also I would think this is only possible with stepper or servo spndle motors and dont think a VFD and induction motor would have the same control but could be worth a try.
Your other option of course is a floating holder for your tap and that should work if you code carefully.
Hood