(video link, embedded below). That's
obvious by the full and appropriat... | |
|
|
From: Leonardo Marsaglia
To: Enhanced Machine Controller (EMC)
Sent: Friday, July 22, 2016 8:46 AM
Subject: Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder
201
2016-07-22 16:59 GMT-03:00 Jon Elson :
> When you start Halscope, you select the thread to attach the sampler to.
>
Just checked that. Since I only have base thread on that machine I never
really payed attention to that. I'm a little too rusty with some things.
--
*Leonardo Marsaglia*.
On 07/22/2016 07:45 AM, Leonardo Marsaglia wrote:
>
> I see. Didn't know or remember that halscope worked on the base thread.
> Well, something new I'm learning about LinuxCNC :)
>
When you start Halscope, you select the thread to attach the sampler to.
Jon
--
2016-07-22 13:41 GMT-03:00 andy pugh :
> This is interesting:
> http://webpages.charter.net/dawill/tmoranwms/Elec_IndHeat1.html
> et.seq.
>
> Quite old now, and an awful lot of the clever sequencing stuff (and
> pulse generation) would be much easier to do with an Arduino or
> similar now.
>
I've
On 22 July 2016 at 14:44, Gene Heskett wrote:
> Induction heating is something I'd like to make work on a small scale,
> with a coil big enough to pass over some of the stuff I might make out
> of 1/2" A2.
This is interesting:
http://webpages.charter.net/dawill/tmoranwms/Elec_IndHeat1.html
et.seq
By the way if someone needs cheap and really good 5000 ppr encoders here's
the link from where I bouht them:
http://www.ebay.com/itm/Hiedenhain-Rotary-Encoder-5000ppr-ERN-471-/231990429901?hash=item3603b508cd:g:vpwAAOSwqrtWoqxN
They are listed as "new" but I guess they have almost no use or somet
2016-07-22 10:44 GMT-03:00 Gene Heskett :
> Induction heating is something I'd like to make work on a small scale,
> with a coil big enough to pass over some of the stuff I might make out
> of 1/2" A2.
>
It's a really cool subject to work on. We were doing some experiments with
low power (up to 8
2016-07-19 13:40 GMT-03:00 John Kasunich :
> If set to auto-trigger, neither scope is likely to detect an index pulse.
>
> In that situation, a digital with deep memory, slow sweep speed (or roll
> mode) and a glitch capture mode would do better than the analog.
>
> But the real answer is to switc
On Friday 22 July 2016 08:45:27 Leonardo Marsaglia wrote:
> 2016-07-19 13:16 GMT-03:00 Gene Heskett :
> > The sample rate of the halscope is the base thread of the machine,
> > and unless that sample point could be stepped down thru the list of
> > addf's in your hal file, something we haven't a k
On Friday 22 July 2016 08:34:08 Leonardo Marsaglia wrote:
> 2016-07-19 13:02 GMT-03:00 Gene Heskett :
> > Each has its strong points, and needs to be used according to what
> > you want to see. So if the budget can cover both, have both in your
> > bag of tricks. A digital such as I have, can be
2016-07-19 13:16 GMT-03:00 Gene Heskett :
> The sample rate of the halscope is the base thread of the machine, and
> unless that sample point could be stepped down thru the list of addf's
> in your hal file, something we haven't a knob to do, is likely going to
> miss the index. I have no clue of
2016-07-19 13:02 GMT-03:00 Gene Heskett :
> Each has its strong points, and needs to be used according to what you
> want to see. So if the budget can cover both, have both in your bag of
> tricks. A digital such as I have, can be sourced from fleabay
>
> <
> http://www.ebay.com/itm/DSO5102P-Hant
On Tue, 19 Jul 2016, John Kasunich wrote:
> Date: Tue, 19 Jul 2016 12:40:21 -0400
> From: John Kasunich
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Semi OT: Can't measure Index pulse o
On Tue, Jul 19, 2016, at 08:20 AM, Leonardo Marsaglia wrote:
> Could it a disadvantage the use of a digital scope over an analog one?. I
> remember talking about scoping half bridges for an induction heater and
> somebody underscored the advantages of the analog scope over the digital in
> some c
On Tuesday 19 July 2016 10:06:39 Leonardo Marsaglia wrote:
> 2016-07-19 10:32 GMT-03:00 sam sokolik :
> > we have used many encoders with index pulses and linuxcnc (mesa
> > hardware) So far no issues. I have checked a few just to make sure
> > - I set the index-enable true on the encoder and th
On Tuesday 19 July 2016 08:20:37 Leonardo Marsaglia wrote:
> Could it a disadvantage the use of a digital scope over an analog
> one?. I remember talking about scoping half bridges for an induction
> heater and somebody underscored the advantages of the analog scope
> over the digital in some case
2016-07-19 10:32 GMT-03:00 sam sokolik :
> we have used many encoders with index pulses and linuxcnc (mesa
> hardware) So far no issues. I have checked a few just to make sure - I
> set the index-enable true on the encoder and then turn the encoder.
> When it goes false - it has detected the ind
we have used many encoders with index pulses and linuxcnc (mesa
hardware) So far no issues. I have checked a few just to make sure - I
set the index-enable true on the encoder and then turn the encoder.
When it goes false - it has detected the index.
are these linear scales? usually those o
Could it a disadvantage the use of a digital scope over an analog one?. I
remember talking about scoping half bridges for an induction heater and
somebody underscored the advantages of the analog scope over the digital in
some cases, wich is why some people recommend having both of them.
2016-07-1
My lesson learned when looking for an index pulse on digital scope was
to change the trigger to Normal, not Auto.
Auto trigger might be the reason to miss short index pulse.
07/13/2016 04:56 PM, Leonardo Marsaglia rašė:
> Hello to all.
>
> We just tested some Heindenhain encoders and as happene
On Thursday 14 July 2016 11:20:03 dave wrote:
> On 07/13/2016 03:49 PM, Gene Heskett wrote:
> > On Wednesday 13 July 2016 15:57:38 Leonardo Marsaglia wrote:
> >> Hello Jon.
> >>
> >> Well, the encoders that are already installed on one of our
> >> machines are labelled with the Index pulse. The th
On 07/13/2016 03:49 PM, Gene Heskett wrote:
> On Wednesday 13 July 2016 15:57:38 Leonardo Marsaglia wrote:
>
>> Hello Jon.
>>
>> Well, the encoders that are already installed on one of our machines
>> are labelled with the Index pulse. The thing is I can't read the pulse
>> with halscope for exam
2016-07-13 19:49 GMT-03:00 Gene Heskett :
> I don't think halscope is going to catch it unless you have it running in
> free roll and are turning the motor/encoder slowly by hand. You can
> either watch it with a good 200 Mhz digital scope, or some breakout
> boards have led tally's that I have fo
2016-07-13 18:58 GMT-03:00 John Kasunich :
> In your original posting you said you couldn't detect the index pulse with
> a digital scope at 20nS. Now you say you can't detect it with Halscope.
> Those are two completely different things.
>
> As Peter said, if you are using hardware encoder count
2016-07-13 17:42 GMT-03:00 Peter C. Wallace :
> The index pulse of a high resolution encoder is very likely to be too short
> for LinuxCNC to sense without hardware help.
>
> Imagine a 1000 count encoder with a index pulse that lasts one 1/2 cycle
> (same
> slot width as encoder) The index pulse w
On Wednesday 13 July 2016 15:57:38 Leonardo Marsaglia wrote:
> Hello Jon.
>
> Well, the encoders that are already installed on one of our machines
> are labelled with the Index pulse. The thing is I can't read the pulse
> with halscope for example.
>
I don't think halscope is going to catch it unl
On Wednesday 13 July 2016 09:56:43 Leonardo Marsaglia wrote:
> Hello to all.
>
> We just tested some Heindenhain encoders and as happened with other
> encoders we can't sense the index pulse. We tried to detect it with a
> 20 nano seconds period on a digital scope but nothing happens. All the
> ot
On Wed, Jul 13, 2016, at 03:57 PM, Leonardo Marsaglia wrote:
> Hello Jon.
>
> Well, the encoders that are already installed on one of our machines are
> labelled with the Index pulse. The thing is I can't read the pulse with
> halscope for example.
>
> I just tried to use the home using only in
On Wed, 13 Jul 2016, Leonardo Marsaglia wrote:
> Date: Wed, 13 Jul 2016 16:57:38 -0300
> From: Leonardo Marsaglia
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Semi OT: Can'
Hello Jon.
Well, the encoders that are already installed on one of our machines are
labelled with the Index pulse. The thing is I can't read the pulse with
halscope for example.
I just tried to use the home using only index pulse and apparently the
index pulse is working because the axis latches
Hello to all.
We just tested some Heindenhain encoders and as happened with other
encoders we can't sense the index pulse. We tried to detect it with a 20
nano seconds period on a digital scope but nothing happens. All the other
pulses are working perfect except the index one.
I have to mention t
On 07/13/2016 08:56 AM, Leonardo Marsaglia wrote:
> Hello to all.
>
> We just tested some Heindenhain encoders and as happened with other
> encoders we can't sense the index pulse. We tried to detect it with a 20
> nano seconds period on a digital scope but nothing happens. All the other
> pulses a
32 matches
Mail list logo
