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Author Topic: multi lead threading  (Read 1691 times)
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baldysm
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« on: April 13, 2007, 11:13:29 AM »

I tried going through the wizard in Mach 3 lathe, and could not find an option for multiple leads.

What is the best/easiest way to program 2,3, or 4 lead threads?

Can I use the wizard and give it a different starting Z? If I'm doing a 2 lead thread that gauges at 36 TPI, but is cut with 18 TPI, would I start 1 lead at Z0, and the next at Z .0277 for example, and just cut/paste the parts of the program I need together?

There is also a G-code that will make 1 threading cut, but seems really tedious, especially with 3-4 lead threads. I forget the exact G-code, but is that my only option for multi-lead threads?

Any ideas?
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Ian Ralston
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« Reply #1 on: April 13, 2007, 02:47:21 PM »

On a lathe, use a 36 tpi chaser and cut at 18 tpi ?

Ian
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Graham Waterworth
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« Reply #2 on: April 13, 2007, 05:07:36 PM »

When I do multi start threads I use the offset Z method.

Graham.
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G-Code is on the cutting edge

Autovalues Engineering, CNC machining specialists, Bradford, England
baldysm
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« Reply #3 on: April 13, 2007, 05:12:15 PM »

I'm not real experienced with chasers, but I don't see how their use would give me multiple leads.

Thanks Graham, I'll use that.

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