Messages about installing and using EMC

Leslie Newell | 5 Aug 2009 22:21

Re: soft limits pins

Thinking of soft limits - how difficult would it be to implement 
soft-limits per tool? This would mainly be applicable for the Z axis so 
on a mill you can't stuff the cutter into the table or on a lathe you 
can't stuff the tool in the chuck. That one in particular makes one hell 
of a mess - BTDT.

On a lathe setting the Z+ limit would be handy as well so you can't run 
into the tailstock. Hitting the tailstock can get very ugly if you are 
holding a large part.

I do a lot of one-offs so as the more safeties the better. The way I see 
it working is that you jog the tool to within a hair of the danger zone 
and hit a 'set soft limit' button which stores the position in the tool 
table.

Les

micges wrote:
> Hello,
> 
> With reference to today question about soft limits pins, Is there reason 
> that they aren't removed?
> Now it's possible to change soft limit without restarting EMC, so maybe 
> there is any design to make those pin usable again?
> 
> regards,
> 
> Michael
>

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Haberler Michael | 8 Aug 2009 19:25

Re: soft limits pins


Am 05.08.2009 um 22:21 schrieb Leslie Newell:

> Thinking of soft limits - how difficult would it be to implement
> soft-limits per tool?

that is a nice idea to start with und would help a lot already

I was actually thinking of generalizing the limits from cubes (tool  
must stay within x/y/z softlimit cube) to a 'blocks world', basically  
a list of 3d objects which could not only be displayed on the backplot  
but also tested for intersection on each trajectory. For instance, the  
chuck could be approximated as a cylinder object on the Z axis. A vise  
would be a cube sitting on the xy plane etc.

Some of these are static, like the chuck; some of them are moving or  
movable parts (tools, but also clamps). One could generalize tools as  
3d objects as well.

--

I admit I might be going overboard with generalization - I'm just  
floating an idea.

-Michael

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Dave Caroline | 5 Aug 2009 22:26

Re: soft limits pins

good idea, also the resulting error message from errant gcode needs to
inform you what limit is exceeded

Dave Caroline

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