> I am not advocating against a "spindle stopped" pin as input
> to the main body of EMC code, only against embedding code
> in the main body that prevents the machine implementer from
> having control over the delay between forward and reverse
> by means of HAL or Classic Ladder.
>
> Indeed a
> -Original Message-
> From: Chris Morley [mailto:[EMAIL PROTECTED]
> Sent: Thursday, October 30, 2008 12:59 PM
> To: EMC developers
> Subject: Re: [Emc-developers] spindle brake
>
> >
> >> But really when ever could you change directions with out stoppin
>
>> But really when ever could you change directions with out stopping
>> first? The way I'm talking gives the integrator the all choices
>>
>
> The only example that comes to mind is rigid tapping in a mill
Actually not true. The spindle must stop but only for an instant.
There is no reason
> But really when ever could you change directions with out stopping
> first? The way I'm talking gives the integrator the all choices
>
The only example that comes to mind is rigid tapping in a mill,
however the goal should be to not hard code the behavior into
EMC's main code. Adding additional
> I see what you're talking about now - and I agree that an at-speed
> input which EMC checks at the "right" times would be a nice addition.
>
> I think possibly the "right" times are:
>
> 1) before the first feed move after each spindle start, AND
> 2) before the first feed move after each spi
> From: [EMAIL PROTECTED]
> To: emc-developers@lists.sourceforge.net
> Date: Thu, 30 Oct 2008 09:16:21 -0500
> Subject: Re: [Emc-developers] spindle brake
>
> Regarding pause when reversing spindle (direct M3 to M4 transition),
> th
On Thu, Oct 30, 2008 at 07:28:16AM +, Chris Morley wrote:
>
> What I am saying is that while using CSS , before STARTING a feed line
> EMC should know that the spindle is up_to_speed . I suggest that a HAL
> bit pin (say spindle_up_to_speed) would suffice. Then an integrator could
> connect
ctober 30, 2008 2:28 AM
> To: EMC developers
> Subject: Re: [Emc-developers] spindle brake
>
>
>
> First off let me apologize for being unclear with my thoughts and If
> my wording seemed overly strong.
>
> >> IMHO -CSS should always wait
> >> for an up
There is already a pin called 'motion.feed-hold'. An integrator can use
this today as the way to implement "hold until the spindle is at (or
close to) speed".
The integrator is free to write whatever logic is desired, and hook it
to motion.feed-hold. One slightly odd idea that crossed my mind la
First off let me apologize for being unclear with my thoughts and If
my wording seemed overly strong.
>> IMHO -CSS should always wait
>> for an up to speed signal before STARTING feed otherwise the surface
>> feed might not be even close.
>
> Are you talking about constant surface speed or fe
On Wed, Oct 29, 2008 at 11:55:22PM +, Chris Morley wrote:
> IMHO -CSS should always wait
> for an up to speed signal before STARTING feed otherwise the surface
> feed might not be even close.
Are you talking about constant surface speed or feed per rev? I am
not entirely sure which thing you
> Date: Wed, 29 Oct 2008 19:25:33 -0400
> From: [EMAIL PROTECTED]
> To: emc-developers@lists.sourceforge.net
> Subject: Re: [Emc-developers] spindle brake
>
> [snip]
>
>>Thanks Chris.
>>Maybe we could get John or Ale
[snip]
>Thanks Chris.
>Maybe we could get John or Alex to mention this behavior in the docs please.
>I would think that a pause for up to speed would be very important for
>constant surface feed.
>
>
You can do this with HAL. You can compare the spindle speed to the
expected speed, and activ
> Date: Wed, 29 Oct 2008 17:21:46 -0500
> From: [EMAIL PROTECTED]
> To: emc-developers@lists.sourceforge.net
> Subject: Re: [Emc-developers] spindle brake
>
> On Wed, Oct 29, 2008 at 10:09:23PM +, Chris Morley wrote:
>>
&g
On Wed, Oct 29, 2008 at 10:09:23PM +, Chris Morley wrote:
>
> if some one programs m3 then m4 does EMC put the brake on for a
> certain amount of time, error, or just change directions of the
> spindle.
Just changes direction. This is also how rigid tapping works.
> On a related question wh
if some one programs m3 then m4 does EMC put the brake on for a certain amount
of time, error, or just change directions of the spindle.
On a related question when using constant surface feed does Emc wait till the
spindle is up to speed or just assume that the spindle is up to speed.
A guy want
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