On Mon, 18 Jan 2021, Gene Heskett wrote:
Date: Mon, 18 Jan 2021 23:36:37 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Spindle speed changes with threading.
On Monday 18 January 2021 22:21:00 Peter C.
On Monday 18 January 2021 22:21:00 Peter C. Wallace wrote:
> On Mon, 18 Jan 2021, Gene Heskett wrote:
> > But because once locked, its not a big deal if the cutting load
> > slows the spindle 25%, its still locked at that phase angle and it
> > will stay that way until the end of THAT cut stroke.
On Mon, 18 Jan 2021, Gene Heskett wrote:
But because once locked, its not a big deal if the cutting load slows the
spindle 25%, its still locked at that phase angle and it will stay that
way until the end of THAT cut stroke. But if YOU change the spindle
speed, then YOU have changed the synch
On 1/18/21 3:53 PM, Andy Pugh wrote:
On 18 Jan 2021, at 23:08, John Dammeyer wrote:
So what does LinuxCNC do? Is the thread mucked up if spindle speed is changed
during a feed hold and then start?
I believe that it does. The docs specifically warn against Chang speed during a
threading
On Monday 18 January 2021 18:47:25 John Dammeyer wrote:
> > > So what does LinuxCNC do? Is the thread mucked up if spindle
> > > speed is changed during a feed hold and then start?
> >
> > Feed hold has nothing to do with it John, you can't change the
> > spindle speed in mid thread. Full stop.
On Mon, 18 Jan 2021, John Dammeyer wrote:
Date: Mon, 18 Jan 2021 15:58:12 -0800
From: John Dammeyer
Reply-To: "Enhanced Machine Controller (EMC)"
To: "'Enhanced Machine Controller (EMC)'"
Subject: Re: [Emc-users] Spindle speed changes with threading.
Thanks Jon.
More questions below then.
> > Quick question about threading with LinuxCNC. If you do a feed hold
> > between passes for cutting a thread and during that feed hold
> change the spindle speed what will happen?
> >
> No problem. At the beginning of EACH pass, the spindle
> encoder
> On 18 Jan 2021, at 23:08, John Dammeyer wrote:
>
> So what does LinuxCNC do? Is the thread mucked up if spindle speed is
> changed during a feed hold and then start?
I believe that it does. The docs specifically warn against Chang speed during a
threading cycle.
> > So what does LinuxCNC do? Is the thread mucked up if spindle speed is
> > changed during a feed hold and then start?
> >
> Feed hold has nothing to do with it John, you can't change the spindle
> speed in mid thread. Full stop. Period. I think it could do what is
> needed. But its like Yogi
On 01/18/2021 05:05 PM, John Dammeyer wrote:
Quick question about threading with LinuxCNC. If you do a feed hold between
passes for cutting a thread and during that feed hold change the spindle speed
what will happen?
No problem. At the beginning of EACH pass, the spindle
encoder is
On Monday 18 January 2021 18:05:56 John Dammeyer wrote:
> Quick question about threading with LinuxCNC. If you do a feed hold
> between passes for cutting a thread and during that feed hold change
> the spindle speed what will happen?
>
> From a start it takes a certain amount of time to
Quick question about threading with LinuxCNC. If you do a feed hold between
passes for cutting a thread and during that feed hold change the spindle speed
what will happen?
>From a start it takes a certain amount of time to accelerate up to the
>required speed. If the spindle is turning
I have started looking at STMBL, but it is way, way more
complicated than I need at present, and will take some
care to strip it down to the essentials. I was looking at
the STM32G031 soic-8 $1.72 part, which would be as
minimalist as possible, for the present purpose.
Too many ways to solve a
On Mon, 18 Jan 2021 at 16:42, Ralph Stirling
wrote:
>
> The AD7740 v-to-f converters don't work as well
> as I'd like, and I'm thinking about just using a
> little microcontroller, like the STM32G031 to do
> my A/D conversion.
One option there might be to use the STMBL source, that converts the
On Mon, 18 Jan 2021, Ralph Stirling wrote:
Date: Mon, 18 Jan 2021 16:40:29 +
From: Ralph Stirling
Reply-To: "Enhanced Machine Controller (EMC)"
To: "emc-users@lists.sourceforge.net"
Subject: [Emc-users] Another Mesa vhdl question
The AD7740 v-to-f converters don't work as well
as
The AD7740 v-to-f converters don't work as well
as I'd like, and I'm thinking about just using a
little microcontroller, like the STM32G031 to do
my A/D conversion. While I could generate a
pulse train with frequency or period proportional
to voltage, I got to looking at bit files that include
a
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