Re: Re: Re: EMC spindle speed control

From: Jon Elson <jmelson@...>

>Ray wrote:

>> garyswindell@... wrote
>>
>> >Does EMC have the ability to control the spindle speed in some way?
>> >I notice there are bits on the parallel port definition for spindle
>> >speed decrease/increase, so I assume the answer is yes.
>>>
>>> Gary
>
>> That's what assume gets you. <g> Spindle speed control is a neglected
>> area. What you see in the bridgeportio and ini were written to work with an
>> outboard device that cranked the speed on a bridgeport-like head.

<s>>

>I think it is in better shape than that. I tried to follow through the
>code, and it does seem there is something missing between the 'heart' of
>EMC, and the I/O routines, but I think it is on the order of one or two
>lines of code needing an update. <S>
>I think constant surface speed is in there, it just needs to come out the
>same way that plain Sxxxx RPM does. I need to get in there and make some
>big hacks to allow all the aux. I/O to be passed through the real-time
>section so that access to my parallel port axis control boards can be
>serialized by somebody. While I'm in there, I will attempt to figure out
>what else is needed to make spindle speed control work.

I am corrected by good news indeed! If there is anything that I can do
to help...

Ray