screwcutting

Help and advice for Denfords lathe control software VR Turning.

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paul
Posts: 18
Joined: Tue 17 Oct , 2006 11:55 am
Location: Newcastle

screwcutting

Post by paul » Tue 12 Jan , 2016 15:56 pm

Hello
I have been trying out quickturn 2d design and wanted to make a simple stepped part with a M16 thread.

The simulation in quickturn works perfectly but when I run the prog on the machine the threading cycle did not cut anything and the tool returns all the way back home in the Z axis between every pass which makes it take ages.

I then looked at my version of VR turning and it was really old so I have installed the latest one incase the old version did not support some of the quickturn functions.

Now it gets to the start of the threading cycle and stops, it says cannot cut thread at this speed, try reducing spindle speed below NAN rpm.
I have changed the default threading speed from 450 to 200 rpm in quickturn but it still reports the same error.

What is NAN rpm anyway.

Have given up for the day now, any ideas appriciated.

Paul

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Steve
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Re: screwcutting

Post by Steve » Wed 03 Feb , 2016 8:06 am

NAN is indicating an invalid value.

See post. viewtopic.php?f=2&t=54&p=8598&hilit=NAN#p8598

It could be a regional setting issue. Check that you have a decimal point not a comma in numbers.

Search the forum for NAN as there are several posts on this.

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Steve
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Re: screwcutting

Post by Steve » Wed 03 Feb , 2016 8:08 am

What machine do you have?

May be a 16mm thread is too course for your machine to cut as the feed rate to cut the pitch is too great.

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