> On Jun 26, 2015, at 10:33 PM, Kirk Wallace <[email protected]> 
> wrote:
> 
> I think the up arrow and positive X motion values should move the cross 
> slide in a positive direction. For back or rear tool lathes it is common 
> for the positive direction to be away from the operator position (with 
> the spindle to the left). You should be able to set up the motion part 
> fairly easily using the sense (+/-) of the scale value.

Agreed, and I can set the scale such that +X is up.  Check.

> Once the hardware motion is set up, the plotter screen can be addressed 
> and will need the .axisrc patch or some other software solution applied 
> to Gremlin. I suspect if the .axisrc patch doesn't move the virtual tool 
> up in a top view, there is something wrong with the patch installation 
> or maybe it isn't compatible with newer versions of LinuxCNC.
> 
> The soft limits are based on the machine zero location which are set by 
> homing. Since your home is to the upper right, your min soft limits 
> should have large negative values and small positive max values. The 
> Tormach slant bed lathe has:
> 
> [AXIS_0]
> ...
> MIN_LIMIT =                     -10.0
> MAX_LIMIT =                       0.0000001
> ...
> 
> [AXIS_2]
> ...
> MIN_LIMIT =                     -12.0
> MAX_LIMIT =                       0.0000001
> ...
> 
> http://www.tormach.com/uploads/images/content_images/15l_slantpro/Tormach_15L_SlantPro_Lathe.jpg
>  
> <http://www.tormach.com/uploads/images/content_images/15l_slantpro/Tormach_15L_SlantPro_Lathe.jpg>

Check.  I had them this way (and will put them back), the piece I was missing 
is that I will need to either modify the .axisrc or other such hack to make 
sure everything coincides with this convention. I thought it was something I 
had configured wrong.  I may just be the .axisrc config and I will look at that 
tomorrow.   BTW, I had a chance to observe the Tormach lathe at the recent CNC 
Workshop.  It is a fairly nice machine and the work Tormach has done on the UI 
is very very nice.  I wish I could grab their lathe UI and use it!

> You can get these values by jogging an axis to just inside of a firm 
> limit and getting the axis position in G53 axis value in inch units. 
> Reading G53 isn't convenient, but zeroing all tool and workspace offsets 
> in G54 should do the trick. You can use MSG:
> http://linuxcnc.org/docs/html/gcode/overview.html#sec:messages
> 
> with numbered or name parameters:
> 
> http://linuxcnc.org/docs/html/gcode/overview.html#_numbered_parameters_a_id_sub_numbered_parameters_a
> 
> to check offsets and such.

Ok, I completely lost you on using MSG and named parameters to help in getting 
the values of G53.  Can’t I just read G53 off the preview window (I think that 
is what is shown in the upper left (Not in front of machine but something like 
Rad: X.XXXX and Z: X.XXXX).  I have been zero’ing G54 from the Machine menu 
because I think that is how I had screwed up my tool offsets a couple days ago. 
 How would I use MSG and named parameters to get that?

Many thanks for your help,
-Tom
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