Andy the EXE box looks like the right price if t will do the job. I'll
have a look at it. And all the data sheets etc.
Regards
Andrew
On Sat, Feb 15, 2020, 5:16 AM andy pugh wrote:
> On Fri, 14 Feb 2020 at 15:29, dave engvall wrote:
>
> >
> >
> >
>
On Sat, 15 Feb 2020 01:56:44 -0500, Rafael Skodlar
wrote:
On 2020-02-11 01:04, Chris Albertson wrote:
I said people *want* to use CNC like a laser printer. Most
setups are
not that good. It is a goal and if designing a new system. It is good
to
set the bar high and try to do
On 2020-02-11 01:04, Chris Albertson wrote:
I said people *want* to use CNC like a laser printer. Most setups are
not that good. It is a goal and if designing a new system. It is good to
set the bar high and try to do what can't be done today.What I really
meant was that with a
On Friday 14 February 2020 16:30:51 Andy Pugh wrote:
> > On 14 Feb 2020, at 20:55, Gene Heskett wrote:
> >
> > The coils are usually isolated, with op-amp bias supplied to one end
> > of the coils, so you get sin plus and minus and cosine + and -
>
> I don’t think we are talking about coils
Retrofitting a CNC machine is comparable to retrofitting the drive train of an
automobile (or even just it's control systems). Doing so in a modern car
requires quite a lot more technical knowledge than doing so with a vehicle from
50 years ago. It is a complicated task and no advances in
> On 14 Feb 2020, at 20:55, Gene Heskett wrote:
>
> The coils are usually isolated, with op-amp bias supplied to one end of
> the coils, so you get sin plus and minus and cosine + and -
I don’t think we are talking about coils here.
___
Emc-users
On Thu, Feb 13, 2020 at 11:43 AM Gene Heskett wrote:
> On Thursday 13 February 2020 12:51:26 Chris Albertson wrote:
>
> > When designing something new one must be VERY careful not to be one of
> > Henry Ford's customers.In an interview, someone asked Henry Ford
> > (Who was famous for saying
On Friday 14 February 2020 11:14:18 Chris Albertson wrote:
> Looking at the PDF, It seems I forget to ask one question about the
> signal: Is the sin/cos signal single-ended or differential? In other
> words is it referenced to ground or do we get pins with labels like
> sin+ and sin-
The
Sorry. Yes, a math error.A better estimate of the worst-case might to
20,000 RPM and 1000 pulses per rev. That means 330,000 per second for
each channel. But I bet close to 20,000 per second
A simple comparator with hysteresis would work well. You really do need
to add hysteresis to
John, et al:
The good thing about linuxcnc is that is can accommodate a wide range of
user skill; from those who just want to make chips to those that want
to dig into the internals, to those that can actually write internals.
Ditto on the range of machines. Linuxcnc nee emc was tested on
On Fri, 14 Feb 2020 at 16:16, Chris Albertson
wrote:
>
> If there are even 100 pulses per revolution and the spindle runs at 100K
> RPM then we are talking about 1K or 10 MHz.
>
100,000 rpm is _very_ fast for a spindle. And even then you missed the 60
in rpm / Hz conversion.
--
atp
"A
Looking at the PDF, It seems I forget to ask one question about the signal:
Is the sin/cos signal single-ended or differential? In other words is it
referenced to ground or do we get pins with labels like sin+ and sin-
If there are even 100 pulses per revolution and the spindle runs at 100K
On Fri, 14 Feb 2020 at 15:29, dave engvall wrote:
>
>
> https://www.st.com/content/ccc/resource/technical/document/application_note/group0/6a/82/83/37/61/69/4e/74/DM00497286/files/DM00497286.pdf/jcr:content/translations/en.DM00497286.pdf
Resolvers are a different (and slightly harder) problem
a bit overdone for your app but this should give you an idea. page down
to fig 16.
https://www.st.com/content/ccc/resource/technical/document/application_note/group0/6a/82/83/37/61/69/4e/74/DM00497286/files/DM00497286.pdf/jcr:content/translations/en.DM00497286.pdf
Dave
On 2/13/20 11:01 PM,
On Friday 14 February 2020 07:29:53 Gene Heskett wrote:
> On Friday 14 February 2020 02:01:08 andrew beck wrote:
> > Chris. I'm still learning electronics. Could you expand a bit on
> > this please.
> >
> > Maybe draw a napkin sketch of it. Sorry to be a bit slow on the
> > uptake
>
> I'm not
On Friday 14 February 2020 02:01:08 andrew beck wrote:
> Chris. I'm still learning electronics. Could you expand a bit on
> this please.
>
> Maybe draw a napkin sketch of it. Sorry to be a bit slow on the
> uptake
I'm not Chris, but the word quadrature means two signals that change
state
OK I'll try track down the data sheet. Failing that I'll borrow a
oscilloscope and have a play. I'll post back here tomorrow
Thanks chris
Regards
Andrew
On Fri, Feb 14, 2020, 8:51 PM Chris Albertson
wrote:
> First step is to understand (1) what you have and (2) what you need.
>
> So, If
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: February-13-20 9:51 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Open source CNC architecture
>
> Yes, you do need a special PC. This means a PC you use for Linux CNC and
>
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