Lathe Macros

mariusl wrote:

Is the threading function TPI only or is there a way to enter a metric pitch.

As my lathe is set up as metric then if I put "1.25" in the box I get a 1.25 mm pitch thread.
If your lathe is set up for imperial then you will get a 1.25" pitch.

However, if you put in the feature in post 48403 further up the page then you can type "25tpi" and it will automatically change to "1.016" and then if you type "mm" it will change to "0.04"

Also, is there a way to recover the original setting if the code was stopped midway? If not how would you do it in practise

The cycles all start from where the machine is when the "go" button is pressed, so if I decide to interrupt the sequence I just jog to a suitable starting point and press the button again.

mariusl wrote:

If I use the spinbox feature and enter 1.25mm it converts it to 0.0492 but then I get an error " In G76 K must be greater than J" You have J set at 0.2 so how does K get greater?
Must I modify the sub to use this in any way?

I am a bit confused by your problem. If your lathe is set up in mm, and all the other numbers are mm, then the thread pitch should be mm. (ie, 1.25 in the box is correct for a 1.25mm pitch thread)

I think that the subs include a G21, but perhaps they don't. Is your lathe accidentally in Imperial mode?

mariusl wrote:

The lathe is setup in mm - G21 present
There seem to be an index enable pulse that occurs every revelution of the chuck.

How much does the value of motion.spindle-revs increase for a single rotation of the chuck?
I should count complete revolutions, and increase by 1 for each revolution.