[Emc-users] A

[joe]

Sent from Lou's iPhone

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Re: [Emc-users] Need some advice on where to buy shim stock in custom widths

[Gene Heskett]

On Wednesday 13 July 2016 20:22:50 Ken Strauss wrote:

> I use a small 3-in-1 sheet metal machine (something like
> http://www.grizzly.com/products/12-Combination-3-in-1-Sheet-Metal-Mach
>ine/T2 1320 but from BusyBee in Canada) to cut thick shim stock without
> significant distortion.

Looks handy, for lightweight shearing and box forming but it is too light 
for the 1/8" alu I usually saw up to make box panels out of.  Thanks Ken 
but for north of $300, I'll pass & sharpen my scissors again.

> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > Sent: Wednesday, July 13, 2016 6:41 PM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Need some advice on where to buy shim stock
> > in custom widths
> >
> > On Wednesday 13 July 2016 13:26:14 Jon Elson wrote:
> > > On 07/12/2016 04:31 PM, Gene Heskett wrote:
> > > > So the question is: Who is likely to be able to supply this
> > > > stuff 0.010" thick by 0.400 wide?  Brass or SS would be a never
> > > > mind.
> > >
> > > I think McMaster-Carr and MSC stock kits of brass shim stock with
> > > about 15 thicknesses (.010" definitely in the set) in brass, and I
> > > think the sheets are 6 x 12".  I also buy 100'
> > > rolls of .003" shim stock in 12" widths, that is a special order
> > > item. I think I get these from MSC.  But, the 6" x 100' roll is
> > > stock. You just cut it with tin snips.
> > >
> > > Jon
> >
> > I saw those in my searches last night, but figured I'd get advice
> > from
>
> more
>
> > experienced people first.
> >
> > My snips, or sharp scissors always seem to curl it up some. Hows the
> > best
>
> way
>
> > to flatten it out so it just lays there? This SS stuff can lay flat
> > enough
>
> to seal to
>
> > a sheet of glass.  Looks like the long edges might have been die
> > cut, in
>
> 6" of it,
>
> > maybe .001" variation in the width at .401" on my dial or digital
>
> calipers.
>
> > > --
> > >  What NetFlow Analyzer can do for you? Monitors
> > > network bandwidth and traffic patterns at an interface-level.
> > > Reveals which users, apps, and protocols are consuming the most
> > > bandwidth. Provides multi-vendor support for NetFlow, J-Flow,
> > > sFlow and other flows. Make informed decisions using capacity
> > > planning
> > >reports.http://sdm.link/zohodev2dev
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> >  soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > Genes Web page 
>
> --
>-- --
>
> > What NetFlow Analyzer can do for you? Monitors network bandwidth and
> > traffic patterns at an interface-level. Reveals which users, apps,
> > and
>
> protocols
>
> > are consuming the most bandwidth. Provides multi-vendor support for
> > NetFlow, J-Flow, sFlow and other flows. Make informed decisions
> > using capacity planning reports.http://sdm.link/zohodev2dev
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> --
> What NetFlow Analyzer can do for you? Monitors network
> bandwidth and traffic patterns at an interface-level. Reveals which
> users, apps, and protocols are consuming the most bandwidth. Provides
> multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make
> informed decisions using capacity planning
> reports.http://sdm.link/zohodev2dev
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
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patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
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[Emc-users] Anyone heard of EBZ Engineering from the mid 90's?

[Gregg Eshelman]

Looking at a small 3-axis CNC unit from 1995. All gold/orange anodized aluminum 
bridge style frame with the spindle moving in X and Z on it while the table on 
the bed moves in Y.
The label says it's a Kaba-Keycut, date is from 1995. Has a funky lever action 
vise with special jaws and a V pointed bit in an ER-16 collet, though with a 
very slim nut that would take a special wrench instead of the common hex nut.

I find nothing whatsoever about key cutting or CNC equipment with the current 
company named EBZ Engineering, though it is still in Germany. (The motors have 
German names etc on them.)

Now for the kicker. The only interface connection on it is a DA-15 female plug, 
same as on old PC gameports and Mac monitor ports. I opened up the electronics 
box and there's zip, zero, nada, no marking of any sort on the PCB.
My assumption is that port has RS232 communication plus some sort of feedback 
lines. There's a tiny button on one of the clamps holding the vise, with a wire 
going off to somewhere, and there's probe mounted under the head to the rear of 
the spindle. Assumption, those are for Z-zero setting.
Alternatively, all the required step, direction, enable etc signals for a 3 
axis stepper motor mill can fit onto only 14 pins. There's no separate spindle 
power switch or speed knob on it so that also must be controlled via the 15 pin 
connector.
How might I go about figuring out the pinout on this? If that can't be done and 
no 1995 vintage manual can be turned up, then the only option would be to toss 
the existing electronics and fill the box with new. Without the specialized 
vise, or with different jaws, it could be useful for milling small and 
intricate things. Looks to have working volume around 2x2x2".
--
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Re: [Emc-users] Need some advice on where to buy shim stock in custom widths

[Ken Strauss]

I use a small 3-in-1 sheet metal machine (something like
http://www.grizzly.com/products/12-Combination-3-in-1-Sheet-Metal-Machine/T2
1320 but from BusyBee in Canada) to cut thick shim stock without significant
distortion.

> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Wednesday, July 13, 2016 6:41 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Need some advice on where to buy shim stock in
> custom widths
>
> On Wednesday 13 July 2016 13:26:14 Jon Elson wrote:
>
> > On 07/12/2016 04:31 PM, Gene Heskett wrote:
> > > So the question is: Who is likely to be able to supply this stuff
> > > 0.010" thick by 0.400 wide?  Brass or SS would be a never mind.
> >
> > I think McMaster-Carr and MSC stock kits of brass shim stock with
> > about 15 thicknesses (.010" definitely in the set) in brass, and I
> > think the sheets are 6 x 12".  I also buy 100'
> > rolls of .003" shim stock in 12" widths, that is a special order item.
> > I think I get these from MSC.  But, the 6" x 100' roll is stock.
> > You just cut it with tin snips.
> >
> > Jon
>
> I saw those in my searches last night, but figured I'd get advice from
more
> experienced people first.
>
> My snips, or sharp scissors always seem to curl it up some. Hows the best
way
> to flatten it out so it just lays there? This SS stuff can lay flat enough
to seal to
> a sheet of glass.  Looks like the long edges might have been die cut, in
6" of it,
> maybe .001" variation in the width at .401" on my dial or digital
calipers.
>
> > --
> > What NetFlow Analyzer can do for you? Monitors network
> >bandwidth and traffic patterns at an interface-level. Reveals which
> >users, apps, and protocols are consuming the most bandwidth. Provides
> >multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make
> >informed decisions using capacity planning
> >reports.http://sdm.link/zohodev2dev
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page 
>
>

--
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic patterns at an interface-level. Reveals which users, apps, and
protocols
> are consuming the most bandwidth. Provides multi-vendor support for
> NetFlow, J-Flow, sFlow and other flows. Make informed decisions using
> capacity planning reports.http://sdm.link/zohodev2dev
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



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patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Leonardo Marsaglia]

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 found to be handier than sliced
> bread or bottled beer, you just turn the motor very slowly while
> watching the leds.
>

Well, I guess I just learned something new about how encoders work :). From
what I've measured the Heindenhain are just fine, but I guess I'll wait
until I have the hardware to wire them up to LinuxCNC so I can fully test
them.

My idea now is to start the testing on one of the joints of the lathe with
an external PC without touching the original logic just to test everything
like PID, drive initialization, and so on. So, as soon as I have all the
electronics ready I'm going to mount the new encoder wich has a rather easy
coupling mount, and I'm going to move that axis to see how it works. Then
the other one, wich is going to be very similar and if everything works
well the idea is to schedule a date to replace all the logic and re start
the machine with LinuxCNC.

Hopefully, once everything is tested, the machine is going to be out of
service for 5 days. Since we're going to use everything as it is (general
purpose relays, turret motor that runs forward and reverse also with
relays, turret indexing and clamping inductive sensors, etc.) we only have
to identify the connectors and reconnect them on the new hardware.

I hope soon I can have some footage of the machine running with LinuxCNC so
you can watch it!



-- 
*Leonardo Marsaglia*.
--
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Leonardo Marsaglia]

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 counters (Mesa, PPMC, or
> any other), Halscope is very unlikely to see the actual index pulse.  But
> that
> doesn't matter.  If you want to look at things with Halscope look at the
> index-enable HAL signal.  It will be set true by the motion controller when
> the homing sequence starts to look for an index, and then set false by the
> hardware encoder driver when the index is detected.
>
> If index-enable goes true and then never goes false, that points toward
> the index signal from the encoder not making it to the hardware encoder
> counter.  That is when you dig out the real scope and look at the real
> signal on a real wire.
>

Hello John.

Indeed I tried to measure some Heindenhain encoders that I just bought at a
really good price on ebay just to see if they worked properly. Everything
works ok, but I couldn't measure the index and that's why I was worried.

Then I tried to see if the encoders I had already installed on my machine
(from another brand) were working ok, and the only way to see that was to
set the index pulse to home the machine. Apparently the one I tested is
working but I can't hook the ones that I bought yet because I need to order
some boards to try them.

As simple as it is the concept of the index pulse, since I've never used
it, it was giving me some head ache because it's imperative for the Mazak
conversion to work with index for the homing sequence.




-- 
*Leonardo Marsaglia*.
--
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patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Leonardo Marsaglia]

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 width would be less than 1 ms at any
> speed over 30 RPM so likely to be missed at a 1 mS servo thread sample
> interval of HALScope. That is it might occur between HALScope sample
> intervals
>
>
> Index hardware in an encoder counter latches or clears the encoder count on
> index and typically sets a flag to tell LinuxCNC that an index event has
> occured. Because of this, a LinuxCNC system with a hardware encoder counter
> will not miss the index even even though the counter is only polled at 1 mS
> intervals
>

Thanks Peter for clarifying this. I thought halscope could be capable of
reading the index pulse even if I turn the motor really slow.

I suspect that the Index is working at least in one of my encoders
installed because it seems to find the home position when I ask for it (I
was using the direct homing option with this machine so I never intended to
use the index pulse).


-- 
*Leonardo Marsaglia*.
--
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patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Gene Heskett]

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 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 found to be handier than sliced 
bread or bottled beer, you just turn the motor very slowly while 
watching the leds.

> I just tried to use the home using only index pulse and apparently the
> index pulse is working because the axis latches until it stops and it
> turns always a single turn more or less eyeballing it.
>
> The strange thing is I that I can't trigger the scope with the index
> pulse on LinuxCNC, and also I can't measure the index on my other
> encoders. I guess I should try to wire them to a LinuxCNC pc and make
> home manually to see if they work ok.
>
> 2016-07-13 14:29 GMT-03:00 Jon Elson :
> > 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 are working perfect except the index
> > > one.
> > >
> > > I have to mention that this happened with other encoders too, but
> > > since
> >
> > we
> >
> > > didn't need to use them with index pulse on the other machines we
> > > just
> >
> > let
> >
> > > it that way and didn't worry about it.
> >
> > Well, if the scope does not trigger on it, and it triggers
> > fine on the A and B, then it just isn't there!
> > Now, of course, the index will only happen once per rev, so
> > you have to make a full turn to see the pulse.
> > Are you SURE these encoders actually have the index pulse?
> >
> > Jon
> >
> >
> > 
> >-- What NetFlow Analyzer can do for you? Monitors network
> > bandwidth and traffic
> > patterns at an interface-level. Reveals which users, apps, and
> > protocols are
> > consuming the most bandwidth. Provides multi-vendor support for
> > NetFlow, J-Flow, sFlow and other flows. Make informed decisions
> > using capacity planning
> > reports.http://sdm.link/zohodev2dev
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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Re: [Emc-users] Need some advice on where to buy shim stock in custom widths

[Gene Heskett]

On Wednesday 13 July 2016 13:26:14 Jon Elson wrote:

> On 07/12/2016 04:31 PM, Gene Heskett wrote:
> > So the question is: Who is likely to be able to supply this stuff
> > 0.010" thick by 0.400 wide?  Brass or SS would be a never mind.
>
> I think McMaster-Carr and MSC stock kits of brass shim stock
> with about 15 thicknesses (.010" definitely in the set) in
> brass, and I think the sheets are 6 x 12".  I also buy 100'
> rolls of .003" shim stock in 12" widths, that is a special
> order item.  I think I get these from MSC.  But, the 6" x
> 100' roll is stock.
> You just cut it with tin snips.
>
> Jon

I saw those in my searches last night, but figured I'd get advice from 
more experienced people first.

My snips, or sharp scissors always seem to curl it up some. Hows the best 
way to flatten it out so it just lays there? This SS stuff can lay flat 
enough to seal to a sheet of glass.  Looks like the long edges might 
have been die cut, in 6" of it, maybe .001" variation in the width 
at .401" on my dial or digital calipers.

> --
> What NetFlow Analyzer can do for you? Monitors network
> bandwidth and traffic patterns at an interface-level. Reveals which
> users, apps, and protocols are consuming the most bandwidth. Provides
> multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make
> informed decisions using capacity planning
> reports.http://sdm.link/zohodev2dev
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Gene Heskett]

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
> other pulses are working perfect except the index one.
>
> I have to mention that this happened with other encoders too, but
> since we didn't need to use them with index pulse on the other
> machines we just let it that way and didn't worry about it.
>
> The trouble is we also tried to detect the index pulse on LinuxCNC but
> we never could. Is this because the pulse happens so quickly that we
> can't really scope it? Or are we missing something about how to
> measure it?
>
> We're worried because now we need to use the index pulse for homing
> our Mazak lathe that we're converting to LinuxCNC.
>
> Thanks as always for your help!

Perhaps it needs a pullup resistor?  What is the resting voltage when its 
all powered up on this index pulse line?  If under a volt on the usual 
digital DVM, I'd try a 4.7k resistor from it to a 3.3 or 5 volt line. 
But have a meter or scope on it when you touch the + line with the 
resistor, and if you don't see pretty close to the + rail, rotate it a 
few degrees and retry it again.  If its stuck down under a volt both 
times, its time to call Heindenhain & see if we don't know what we're 
doing.  There is always that possibility.

Cheers Leonardo, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[John Kasunich]

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 index pulse and apparently the
> index pulse is working because the axis latches until it stops and it turns
> always a single turn more or less eyeballing it.
> 
> The strange thing is I that I can't trigger the scope with the index pulse
> on LinuxCNC, and also I can't measure the index on my other encoders. I
> guess I should try to wire them to a LinuxCNC pc and make home manually to
> see if they work ok.

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 counters (Mesa, PPMC, or
any other), Halscope is very unlikely to see the actual index pulse.  But that
doesn't matter.  If you want to look at things with Halscope look at the 
index-enable HAL signal.  It will be set true by the motion controller when
the homing sequence starts to look for an index, and then set false by the
hardware encoder driver when the index is detected.

If index-enable goes true and then never goes false, that points toward
the index signal from the encoder not making it to the hardware encoder
counter.  That is when you dig out the real scope and look at the real
signal on a real wire.



> 
> 
> 
> 2016-07-13 14:29 GMT-03:00 Jon Elson :
> 
> > 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 are working perfect except the index one.
> > >
> > > I have to mention that this happened with other encoders too, but since
> > we
> > > didn't need to use them with index pulse on the other machines we just
> > let
> > > it that way and didn't worry about it.
> > >
> > >
> > Well, if the scope does not trigger on it, and it triggers
> > fine on the A and B, then it just isn't there!
> > Now, of course, the index will only happen once per rev, so
> > you have to make a full turn to see the pulse.
> > Are you SURE these encoders actually have the index pulse?
> >
> > Jon
> >
> >
> > --
> > What NetFlow Analyzer can do for you? Monitors network bandwidth and
> > traffic
> > patterns at an interface-level. Reveals which users, apps, and protocols
> > are
> > consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> > J-Flow, sFlow and other flows. Make informed decisions using capacity
> > planning
> > reports.http://sdm.link/zohodev2dev
> > ___
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> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> 
> 
> 
> -- 
> *Leonardo Marsaglia*.
> --
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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Peter C. Wallace]

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't measure Index pulse on encoder
> 
> 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 until it stops and it turns
> always a single turn more or less eyeballing it.
>
> The strange thing is I that I can't trigger the scope with the index pulse
> on LinuxCNC, and also I can't measure the index on my other encoders. I
> guess I should try to wire them to a LinuxCNC pc and make home manually to
> see if they work ok.


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 width would be less than 1 ms at any 
speed over 30 RPM so likely to be missed at a 1 mS servo thread sample 
interval of HALScope. That is it might occur between HALScope sample intervals


Index hardware in an encoder counter latches or clears the encoder count on 
index and typically sets a flag to tell LinuxCNC that an index event has 
occured. Because of this, a LinuxCNC system with a hardware encoder counter 
will not miss the index even even though the counter is only polled at 1 mS 
intervals




>
>
>
> 2016-07-13 14:29 GMT-03:00 Jon Elson :
>
>> 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 are working perfect except the index one.
>>>
>>> I have to mention that this happened with other encoders too, but since
>> we
>>> didn't need to use them with index pulse on the other machines we just
>> let
>>> it that way and didn't worry about it.
>>>
>>>
>> Well, if the scope does not trigger on it, and it triggers
>> fine on the A and B, then it just isn't there!
>> Now, of course, the index will only happen once per rev, so
>> you have to make a full turn to see the pulse.
>> Are you SURE these encoders actually have the index pulse?
>>
>> Jon
>>
>>
>> --
>> What NetFlow Analyzer can do for you? Monitors network bandwidth and
>> traffic
>> patterns at an interface-level. Reveals which users, apps, and protocols
>> are
>> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
>> J-Flow, sFlow and other flows. Make informed decisions using capacity
>> planning
>> reports.http://sdm.link/zohodev2dev
>> ___
>> Emc-users mailing list
>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
>>
>
>
>
> -- 
> *Leonardo Marsaglia*.
> --
> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
> patterns at an interface-level. Reveals which users, apps, and protocols are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity planning
> reports.http://sdm.link/zohodev2dev
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Leonardo Marsaglia]

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 until it stops and it turns
always a single turn more or less eyeballing it.

The strange thing is I that I can't trigger the scope with the index pulse
on LinuxCNC, and also I can't measure the index on my other encoders. I
guess I should try to wire them to a LinuxCNC pc and make home manually to
see if they work ok.



2016-07-13 14:29 GMT-03:00 Jon Elson :

> 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 are working perfect except the index one.
> >
> > I have to mention that this happened with other encoders too, but since
> we
> > didn't need to use them with index pulse on the other machines we just
> let
> > it that way and didn't worry about it.
> >
> >
> Well, if the scope does not trigger on it, and it triggers
> fine on the A and B, then it just isn't there!
> Now, of course, the index will only happen once per rev, so
> you have to make a full turn to see the pulse.
> Are you SURE these encoders actually have the index pulse?
>
> Jon
>
>
> --
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning
> reports.http://sdm.link/zohodev2dev
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>



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Re: [Emc-users] Need some advice on where to buy shim stock in custom widths

[Dave Caroline]

I get rid of the curled/rough edge by a bit of grinding/filing and
also I roll it with a ball bearing on a bit of ground flat steel with
a finger through the bearing pressing down.

Sharp scissors or best tins nips

Dave Caroline

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[Emc-users] Semi OT: Can't measure Index pulse on encoder

[Leonardo Marsaglia]

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 that this happened with other encoders too, but since we
didn't need to use them with index pulse on the other machines we just let
it that way and didn't worry about it.

The trouble is we also tried to detect the index pulse on LinuxCNC but we
never could. Is this because the pulse happens so quickly that we can't
really scope it? Or are we missing something about how to measure it?

We're worried because now we need to use the index pulse for homing our
Mazak lathe that we're converting to LinuxCNC.

Thanks as always for your help!

-- 
*Leonardo Marsaglia*.
--
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[Emc-users] OT: Help locating device.

[Greg Bentzinger]

Hi all;

I have been pulling my hair out trying to find a simple 802.11# unit.

What I need is a small module that takes RJ45 input and makes it a wireless 
connection.

Much like a USB wireless dongal.

Think of it as an inline wireless adaptor, a single IP pass through not a full 
router bridge.

I want to mount a IP camera up on a power pole. This pole has my electric meter 
and a conduit up to a junction box with motion activated flood lights, so I 
have a place to install a power supply. Problem is this pole is out by its 
lonesome and all lines out are in underground conduits so for this island with 
power I need a wireless solution. It is a rough environment, temps from -30F to 
110F are possible here in Colorado.

Power company is fine with me adding the equipment within +/- 18" of the flood 
lights, however if I were to run any cables from the pole they would have to be 
in underground conduits and that requires permits and underground tracing to 
locate where all prior conduits are before digging.

Everything I have been finding in my searches requires a USB interface - if 
nothing else to supply power. Any ideas?

BTW I will be adding another dedicated enclosure for the transmitter and power 
supplies.

All other locations have POE runs but this one spot can't get there from here.

Thanks

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Re: [Emc-users] Semi OT: Can't measure Index pulse on encoder

[Jon Elson]

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 are working perfect except the index one.
>
> I have to mention that this happened with other encoders too, but since we
> didn't need to use them with index pulse on the other machines we just let
> it that way and didn't worry about it.
>
>
Well, if the scope does not trigger on it, and it triggers 
fine on the A and B, then it just isn't there!
Now, of course, the index will only happen once per rev, so 
you have to make a full turn to see the pulse.
Are you SURE these encoders actually have the index pulse?

Jon

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Re: [Emc-users] Need some advice on where to buy shim stock in custom widths

[Jon Elson]

On 07/12/2016 04:31 PM, Gene Heskett wrote:
>
> So the question is: Who is likely to be able to supply this stuff 0.010"
> thick by 0.400 wide?  Brass or SS would be a never mind.
>
>
I think McMaster-Carr and MSC stock kits of brass shim stock 
with about 15 thicknesses (.010" definitely in the set) in 
brass, and I think the sheets are 6 x 12".  I also buy 100' 
rolls of .003" shim stock in 12" widths, that is a special 
order item.  I think I get these from MSC.  But, the 6" x 
100' roll is stock.
You just cut it with tin snips.

Jon

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Re: [Emc-users] OT: Help locating device.

[John Kasunich]

On Tue, Jul 12, 2016, at 09:08 PM, Greg Bentzinger wrote:
> Hi all;
> 
> I have been pulling my hair out trying to find a simple 802.11# unit.
> 
> What I need is a small module that takes RJ45 input and makes it a wireless 
> connection.
> 
> Much like a USB wireless dongal.
> 
> Think of it as an inline wireless adaptor, a single IP pass through not a 
> full router bridge.
> 
> I want to mount a IP camera up on a power pole. This pole has my electric 
> meter and a conduit up to a junction box with motion activated flood lights, 
> so I have a place to install a power supply. Problem is this pole is out by 
> its lonesome and all lines out are in underground conduits so for this island 
> with power I need a wireless solution. It is a rough environment, temps from 
> -30F to 110F are possible here in Colorado.
> 
> Power company is fine with me adding the equipment within +/- 18" of the 
> flood lights, however if I were to run any cables from the pole they would 
> have to be in underground conduits and that requires permits and underground 
> tracing to locate where all prior conduits are before digging.
> 
> Everything I have been finding in my searches requires a USB interface - if 
> nothing else to supply power. Any ideas?

Get one that uses USB only for power, cut the end off a USB cable and splice it 
to a 5V wall wart?


-- 
  John Kasunich
  jmkasun...@fastmail.fm

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[Emc-users] LinuxCNC 2.7.5 is out

[Sebastian Kuzminsky]

LinuxCNC 2.7.5 has been released.

This release includes a fairly large change to the controller, intended
to make Abort (eg, hitting Escape while running a program in Axis)
work more correctly. This change also affects controller startup,
including the processing of [RS274NGC]STARTUP_GCODE. Please be
on the lookout for any surprises in these areas, and let us
know if you notice anything amiss.

This release also includes many other bug fixes, especially in PncConf
and Stepconf, the Gmoccapy GUI, GladeVCP, the 'carousel' toolchanger
component, and more.

All 2.7 users are encouraged to upgrade.

Many thanks to the folks who worked on this release:

* Andy Pugh
* Chris Morley
* Chris Radek
* Dewey Garrett
* Gergely Nagymate
* Jan Mrázek
* Jeff Epler
* John Thornton
* Jon Elson
* Moses McKnight
* Norbert Schechner
* Sam Sokolik
* Sebastian Kuzminsky

The full changelog is available here: 
http://linuxcnc.org/2016/07/13/release-2.7.5/


-- 
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[Emc-users] Need some advice on where to buy shim stock in custom widths

[Gene Heskett]

Greetings all;

I finally got the compound apart, and found that with the cobble job that 
made the gib, with the end broken off and looking as if it was ground 
flat ended with a bench grinder and some new screws installed along with 
some handmade pusher washers that have a finger that projects out to 
catch the end of the gib so that it can be adjusted by loosening the 
screw on one end, and tightening the screw on the other end.  Adjustment 
range is about 3/8" with another 3/16 to be gained by interchanging the 
pusher blocks as one is flat, and the other has a finger pointing at the 
gib .

But the biggest surprise was that it had a pair of .0055" thick, .401" 
wide SS shims laid on it, tightening it about .011".  Best I can do is 
about .007" play, so it appears that if I could find some shim stock of 
that width and .010" thick, I could cut one exactly the length of the 
gib, and another 1/4" longer, and fold the ends of this one over the 
ends of the gib, exactly as the .006" thick stock is fitted now.

So the question is: Who is likely to be able to supply this stuff 0.010" 
thick by 0.400 wide?  Brass or SS would be a never mind.

A foot of it would be enough. 

Side comment, the carriage extension that reaches back to the taper 
attachment, looks like its part of the crossfeed, but its not, its 
attached to the rear of the crossfeed with 3 screws and was likely part 
of the taper attachment.  Can someone who has one of these without the 
taper attachment confirm that it does have a screw cover on the rear of 
the crossfeed slider, but both the screw and this cover are considerably 
shorter?  When run in to the center of thing, there's about a foot of 
this thing hanging out in the breeze which will complicate putting a 
nema 23 motor back there into a belt drive kludge. 
Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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