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Thanks John D for the reply.
Please follow me on this in regards to the RELS.and as far as I know, there is only 1 more fully operational system
within our forum members.
RELS I must admit is possibly only suitable for mini and moderate size lathes, or at least the people I know who have this system
be it forum members or not. The original Russian system was designed? around a mini lathe I think.

Currently I screw cut by either manual infeed or automatic infeed using the RELS.and no compound slide set at 29.5 degrees, so it?s basically plunge.
Works very well.
Moving on, by using the automatic system, it?s a case of calling up the presets TPI or metric pitch, setting Z axis start and finish and Y cross feed touch on
the major diameter with the tool, and basically that?s it.
The number of roughing and finishing passes are also preset in the .ino firmware.

The final depth of cut can therefore only be calculated by the firmware using a factor of 0.886 x the pitch if using a 60 degree inclusive threading tool.
The firmware does not care about diameters of threads, it could be 40 mm dia? x 1,5 mm thread or 20 mm dia? x 1.0 mm thread.
The firmware will still incrementally (rough and finish) move the tool in the correct depth of thread after initially setting off the cross slide major diameter.
I understand you have a different set of parameters that your system uses.

So please follow me on this, by adding a new set of parameters in the RELS, new page, new display, it?s got to be possible to call up
for example, remove 9 mm off the dia of bar automatically, by setting the number of roughing passes and finish passes regardless of the initial
diameter of the bar, provided you set the cross slide (touch on) first.of the turning tip.
Again, I am not firmware savvy proficient, I know how to add on new feeds, introduce new pitch threads, currently I have over 30 different threads in memory,?
add on new taper angles etc, even I have added a 45 degree taper (chamfers, really useful for large diameter bar.).
So if anybody in the forum is willing to pick up the gauntlet, has the spare time during the winter months, reference a surfacing module for the RELS
I will gladly forward the Arduino file (open source).
Basically, again me being clueless in programming, it?s got to be a case of copy and paste the total threading module and changing a few numbers LOL.?

Hoping this post may also generate further interest in the RELS, get the snowball at the top of the icy hill rolling down, you never
know what you will pick up. LOL

The RELS is really a good system for small time budget conscious hobbyists, but can as always be improved.

I would contact Igor (original inventor of the ELS but I believe he lives in the Eastern block and I do not speak Russian. LOL.

Regards


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John