> 
> On Sat, Aug 11, 2012 at 11:38 PM, Chris Morley
> <chrisinnana...@hotmail.com> wrote:
> > actually you can command the spindle over modbus
> Any pointer in that direction?
> > or toolchange without ladder,
> same here, please?
> > and if you mean two end switches for gantry homing you can do that too in 
> > HAl.
> No, I have a machine with two switches in sequence, it used to run
> full-speed to first,
> then crawl to the second and home.
> 

ahh yes that would be useful!
since homing doesn't honour overrides there is no work around.
You would need to change the guts of linuxcnc.

but again nothing to do with HAL.
If the HAL component doesn't do what you want you have to write another one
that will.
In the case of homing I'm pretty sure that is fairly complicated as it is more 
then
just changing linuxcnc's motion component - homing goes a level deeper at least.
That would be a good feature to have homing honour overrides while in course
search mode.
Is there a reason you can't use the regular way of homing ?
search fast, hit switch, back off, search slow?
I'm thinking maybe you home to a hard stop so don't want to slam into that 
at high speed..

spindle control  over modbus:
gs2.vdf is a component just for that but is specific to automation direct VDFs
 http://www.linuxcnc.org/docs/2.5/html/examples/gs2_example.html

I don't have an example of tool change without ladder.
It would involve creating a component with comp or C or python.

Chris M 

 
                                          
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