Re: [CAD_CAM_EDM_DRO] Two tools on a lathe-programming problem

You need a control with two CNC contouring processors that may be
programed seperately, This is the essence of a true 4-Axis Lathe. I am
not aware of any software PC based controls that do this but several of
the higher end CNC Controls do.

To do this the two slides could be programmed with the rough and finish
passes with the Z difference in the tool tips loaded as an axix offset.
The orignial traceing lathe control likely had two seperate tracing
stylii to independently control the two slides.

gary aka nitewatchman

Ron Ginger wrote:

>I was asked to help convert a large hydrauilc tracer lathe to CNC. This
>is a wood turing machine that generally makes things like porch column-
>up to 10 ft long.
>
>The basice machine would be a simple project, BUT there is one item I
>cannot figure out. It has one carriage driven by a servo motor, but it
>carries TWO cross slides. The slides are about 6 " apart. In tracer use
>the leading cross slide carries a rough cut tool, the following one
>carries a finish tool. In one pass (remember, 10 FEET long) two cuts are
>taken.
>
>It would be simple to put a motor on each cross slide, but how would I
>code it? There is only one controllable Z axis. At any particular spot
>the two X slides need to be in different places. If I could build some
>kind of 'delay line' I could delay all the x steps by the right ammount,
>but that seems tricky.
>
>Is there any software that does this? I understand there are commercial
>CNC lathes sold that can do this.
>
>Fred, can Vector do this?
>
>ron ginger
>
>
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