Re: [CAD_CAM_EDM_DRO] bdi-4.16 EMC -- Help with Config of Graphics

Hi Jon, David,

OK, I know the sound card is just a chip with registers to write, so one
could change the pitch, etc. EMC's buffering of moves would make it
complicated indeed (for that matter, how can it thread?).

But what I'd like to know, is why one would want to sync a voice coil
with the spindle? some kind of rotational correction for out of round?
Is this done?

Alan KM6VV


Jon Elson wrote:

> David A. Frantz wrote:
>
>
>>Well you had to ask!
>>
>>Sound is useful for just about any sort of of software provided the user
>>has control over the use of the sound. Even with CNC sound can be
>>usefully employed to do things like signal the end of a very long
>>program. Granted the easy way to do this with CNC is to hook up one
>>of your spare outputs to a buzzer, but what happens if you don't have
>>that spare buzzer?
>>
>>Then there are things like hooking up your tool to a voice coil synced
>>to your spindle on a lathe. A nice way to turn things just so slightly
>>out of round.
>>
>>
>
> OK, how are you going to use a sound card to sync a voice coil driver to the
> spindle? Is there a real time driver for the sound card? EMC, at
> present, can't
> even sync an AXIS to the spindle! That sounds like a much more useful task
> to spend time on.
>
> Jon
>