(08-05-2014, 07:31 AM)awemawson Wrote: [ -> ]Anyone who hasn't made a mistake hasn't done anything !
Then I've done a hell of a lot!
Ed
The first thread I cut on my current lathe ended up with the correct TPI but shaped more like a saw tooth. It was then I found out that 30 degrees on my compound really means 60 degrees. So I wouldn't make that mistake again, I took a scribe and with the compound set to the proper angle I scratched a line along the side of the compound. Makes it a whole lot easier setting it up.
Ed
Zactly what I did with my 12x36.
Last thread I cut on the Hardinge was a 20 tip, that was the second number over on the chart so I brought the tumbler up into the second slot. Made a couple of light passes and things didn't look right. Check it with the gauge and its not 20, HUH. Next one over on the chart is 27 and thats what I got. HUH. They have an empty space to hold the tumbler up in that doesn't engage anything so I needed the third slot. DUH.
Ah! the old ubiquitous Hardinge. I hope "last thread" doesn't mean you won't thread with the Hardinge again (ha ha ha).
I'm sure you'll work it out, no rush but please fill us in.