Re: [CAD_CAM_EDM_DRO] Re: Tapered Threads? Kim's TurboCNC codes

On Sat, 2003-11-01 at 14:12, rotarysmp wrote:

> The G Codes you have programmed would be a great addition to
> TurboCNC, I hope you and Dave can come to an agreement on these.

Dave is looking at my improvements. I made other improvements this
weekend such as being able to edit the partfile while in SingleStep run
mode.

> You point on true open source is valid, but it supprises me that the
> EMC community still haven't added slaving an axis to an uncontrolled
> encoder count (lathe threading).

No comment.

> Thanks for pointing out that the encoder signal may not be
> symetrical. Really I have no reason to change the code to sync twice
> per rev, I just thought it might be a good first project to learn the
> code.

Spindle synchronization and axis movement is one of the most demanding
parts of the code. A large part of it is in assembly language in TCNC,
although it probably doesn't need to be. I got my feet wet with TCNC
adding spindle reversing and changing menus. Then I added code to
handle multiple handwheel encoders. Then I wrote/modified a few G code
commands.

> Multiple encoder counts would add resolution to single pass
> threads, but would then need a one/rev index count to allow multiple
> passes along the same thread.

Multiple encoder counts are pretty much unnecessary. I've cut threads
with TCNC that got 10 or more passes and they came out beautifully
clean.

TCNC is a much, much better CNC program than people think or give it
credit for, especially my modified version. I'll go out on a limb and
say that it is the best PC based CNC program available. About the only
thing it doesn't do is cutter radiuses and that could be arranged... V4
is supposed to be vastly improved in just about every area as well. We
hope to roll a lot of my improvements into V4 when it is released.

> Mark
>
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--
Kim Lux <lux@...>