lathe intercon conversational turning question <Answered>

[bloomingtonmike]

Recent Lathe conversion to acorn. Went to try the conversational lathe turning similar to Keiths video. I have a question. Why when I start with a 1" dia material in the Header block and I start the turning block with 1" diameter stock and end with .75" stock and .02" doc does the g0 take X to .99 for the first cut?? Shouldn't it be .49" like the graph/draw of job shows?

[cncsnw]

Because the X dimensions in the G codes, and on the DRO display, are part diameter (2x tool travel, because it cuts all around the part).

The X dimensions on the ruler on the graph screen are radius (actual tool travel).

[bloomingtonmike]

I wonder if I have an axis config error. If I was at zero on X (centerline) and I said g0x1, would you expect the X to move towards me to .5" or to move towards me 1"?

Should X be set as a linear movement?

[tblough]

It should physically move 0.5", which would result in a 1" part.

[bloomingtonmike]

Thank you all. Ill try that. I have it moving 1" now
.

[tblough]

You want it to physically move 0.5". See that big circle next to the X on your dro? That means that X axis values are diameter measurements. So G0X1 means move to 1" diameter, which is physically 0.5" movement on the X axis.

If it is physically moving 1", then you need to [s]double[/s] halve your turns/inch value for the X axis.

[bloomingtonmike]

I set it to half its setting as I need less turns to go less distance. Worked great. Thank you.

[tblough]

You are correct; edited my post to state halve your turns per inch setting.