Rotaty threading

Topics related to wrapped rotary machining in Aspire or VCarve Pro
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rdean33422
Vectric Craftsman
Posts: 129
Joined: Wed Mar 30, 2011 5:55 pm
Model of CNC Machine: RF31, 4X8 Router both CNC

Rotaty threading

Post by rdean33422 »

For one of my projects I needed some internal left hand threads but my lathe does not have the option to reverse the lead screw. I was going to make them at work on one of their lathes on my day off but then I got to thinking. I recently finished an indexer for my mill and had been playing around with it so I modified the boring bar and made a plate to attach it to the spindle of the mill. Using V Carve I made a spiral wrap program with a left hand twist and 0.100 lead.
Turned out fine.

Thanks for looking
Ray
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rscrawford
Vectric Wizard
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Model of CNC Machine: CAMaster Cobra 408 ATC, ShopSabre IS408
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Re: Rotaty threading

Post by rscrawford »

That is pretty ingenious. So you are just using the rotary indexer, and one axis on the mill? Does that boring bar put a lot of torque on your spindle?
Russell Crawford
http://www.cherryleaf-rustle.com

rdean33422
Vectric Craftsman
Posts: 129
Joined: Wed Mar 30, 2011 5:55 pm
Model of CNC Machine: RF31, 4X8 Router both CNC

Re: Rotaty threading

Post by rdean33422 »

Thank you
Actually I disconnected the Z axis and ran it by hand at about 0.025 per pass. I didn't know what to expect so ran everything pretty slow at first.
Since the X and rotary were tied together I could make as many passes as needed.

Another use for Vectric software
Thanks Vectric.

Ray

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