On 01/23/2017 12:05 PM, John Kasunich wrote:
> If you run a program with G33 moves in it and the spindle isn't
> turning, the program will silently hang waiting for index.
Additionally, a G33 move will wait for the spindle-at-speed pin. (See
below)
> The run-time check sould of course use the actual spindle speed from
> the encoder. If you don't have an encoder you can't do G33 anyway.
>[...]
>
> On Mon, Jan 23, 2017, at 12:18 PM, Robert Ellenberg wrote:
>> Is there an INI or HAL setting to tell LinuxCNC that the spindle
>> ismanually controlled?
>
> Not that I'm aware of.
Of course an INI setting could be added to specify whether the spindle
is under LCNC control, but even without this, Rob's spindle-scaling
scheme should still work. If a fixed-speed spindle runs at 2000 RPM but
axis constraints limit max spindle speed to 1000 RPM, the program should
pause indefinitely waiting for the spindle-at-speed pin.
This behavior could be puzzling: the spindle is turning, but axes never
move, why? This might be addressed with a "spindle not coming to speed"
warning following some timeout.
If that makes sense, then here's one way to specify the checks:
- Preview-time check:
- Input: S value
- Applicability: any machine
- Fixed-speed spindles: operator must program S to benefit fm check
- Failure action: raise warning
- Run-time check:
- Input: spindle encoder output
- Applicability: any machine with spindle encoder
- No spindle encoder: hang waiting for index; see next
- Failure action: scale spindle speed
- After timeout on index/spindle-at-speed pins, raise warning
John
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, SlashDot.org! http://sdm.link/slashdot
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
