A quick question, does latency matter for servo drives?
Dropout.
On 2/19/2012 1:36 PM, Viesturs Lācis wrote:
> 2012/2/19 Alan Browning:
>> Thanks for the quick response. So you build your machines from the ground up
>> with new componenets? Due to budget limitations I have to build things on
>>
On 20 February 2012 06:14, Jon Elson wrote:
> Dropout wrote:
> > A quick question, does latency matter for servo drives?
> >
> Yes, absolutely. But, it is not as critical. For software stepping,
> the base
> thread is typically around 20 us, and so a jitter of even 5 us is more than
> noticeabl
On Sun, 19 Feb 2012, Dropout wrote:
> Date: Sun, 19 Feb 2012 13:45:41 -0500
> From: Dropout
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: [Emc-users] Latency - was Re: Which video card/driver for
ler (EMC)"
>> Subject: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC?
>>
>> A quick question, does latency matter for servo drives?
>
> Dropout.
>
> Well at some amount of latency it matters but servo systems will tolerate a
> lot more latency
Dropout wrote:
> A quick question, does latency matter for servo drives?
>
Yes, absolutely. But, it is not as critical. For software stepping,
the base
thread is typically around 20 us, and so a jitter of even 5 us is more than
noticeable. But, on a typical servo system (or a stepper with ex
2012/2/20 Roland Jollivet
> So the norm is that a stepper system can run off the parallel port, but for
> DC servo's, extra hardware is required to sample the encoders.
>
> My question is; if one built a headless system(no video) and disabled
> drivers wherever possible, would such a system be fa
2012/2/20 Roland Jollivet :
>
> My question is; if one built a headless system(no video) and disabled
> drivers wherever possible, would such a system be fast enough to run DC
> servo's and read the encoders on the parallel port?
As Andrew mentioned, for normal speed with normal resolution encoder
Roland Jollivet wrote:
>
> My question is; if one built a headless system(no video) and disabled
> drivers wherever possible, would such a system be fast enough to run DC
> servo's and read the encoders on the parallel port?
>
You have to figure this out for each case. What is the maximum encod
g that the
coffee pot is empty because the coffee machine had a problem downloading the
most recent bean roast sensing algorithm.
--- On Mon, 2/20/12, Jon Elson wrote:
From: Jon Elson
Subject: Re: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC?
To: "Enhanced Machine
Controller (EMC)
Subject: Re: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC?
the allocation of computing resources seems to be a recurring theme with pc
based machine controllers.
while i have wished for an accesible pocket calculator gui more than one time
while standin
On Tue, 2012-02-21 at 03:47 -0800, charles green wrote:
> the allocation of computing resources seems to be a recurring theme
> with pc based machine controllers.
>
> while i have wished for an accesible pocket calculator gui more than
> one time while standing in front of a machining center cons
It would be nice to know enough to debug latency issues, instead it feels
like kludging around with no idea what is the cause. I suppose rtai has
some tools if you know what you are doing.
On Tue, Feb 21, 2012 at 1:12 PM, Kirk Wallace
wrote:
> On Tue, 2012-02-21 at 03:47 -0800, charles green wro
On Tue, Feb 21, 2012 at 1:26 PM, Erik Friesen wrote:
> It would be nice to know enough to debug latency issues, instead it feels
> like kludging around with no idea what is the cause. I suppose rtai has
> some tools if you know what you are doing.
Do they? It's been a while since I have followed
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