Re: [Emc-users] output sink of the 667 hall effect?

[Gregg Eshelman]

There's stranded Ethernet cable.
For that UV curable stuff, get a 9 LED UV flashlight, cheap on eBay. Works much 
better than the twee little single LED that comes with the stuff. Reminds me I 
need to goop up the USB cord for my phone.



 
  From: Gene Heskett 
 To: emc-users@lists.sourceforge.net 
 Sent: Monday, September 12, 2016 9:25 PM
 Subject: Re: [Emc-users] output sink of the 667 hall effect?
   
On Monday 12 September 2016 23:08:53 Gregg Eshelman wrote:

> Why not use twisted pair ethernet cable?
>
Because its single strand solid and supposedly fragile?  The ribbon is 7 
strand & able to stand more flexing.

And I found, at Wallies of all places tonight, some glue pens that 
dispense uv setting resin with an included uv light to cure the stuff.

I intend to make some use of that to prevent wandering wires from 
wandering while they are inside the headstock.
   
 
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Re: [Emc-users] output sink of the 667 hall effect?

[Gene Heskett]

On Monday 12 September 2016 23:08:53 Gregg Eshelman wrote:

> Why not use twisted pair ethernet cable?
>
Because its single strand solid and supposedly fragile?  The ribbon is 7 
strand & able to stand more flexing.

And I found, at Wallies of all places tonight, some glue pens that 
dispense uv setting resin with an included uv light to cure the stuff.

I intend to make some use of that to prevent wandering wires from 
wandering while they are inside the headstock.
>
>
> From: Gene Heskett 
>  To: emc-users@lists.sourceforge.net
>  Sent: Monday, September 12, 2016 11:43 AM
>  Subject: [Emc-users] output sink of the 667 hall effect?
>
> Greetings all;
>
> I see by the spec sheet that the allegro 667 gear sensor can sink up
> to 25 mills.
>
> But with 3 such sensors on the end of a long cable back to the
> breakout board, probably 7 foot by the time I get it routed, I am
> concerned with the potential for crosstalk noise in spite of putting a
> bypass capacitor on the encoder itself.
>
> This noise would be reduced by a lesser amount of current. So, for
> those of you using this device, what value is the resistor are you
> using for a pullup at the breakout board?
>
> And if using a piece of idc ribbon cable, it seems to make sense to
> put a grounded wire between each of the A|Z|B conductors, making that
> a 7 conductor cable rather than a 5. I have around 90 feet of 26 wire
> ribbon I can split off what I need from.
>
> Good idea? Or off the wall & probably will be plagued by noise if I
> shoot for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills
> with a 1k pullup.
>
> Time to assemble that motor driver box I believe.
>
>
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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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Re: [Emc-users] output sink of the 667 hall effect?

[Gene Heskett]

On Monday 12 September 2016 22:14:38 Jon Elson wrote:

> On 09/12/2016 12:43 PM, Gene Heskett wrote:
> > Greetings all;
> >
> > I see by the spec sheet that the allegro 667 gear sensor can sink up
> > to 25 mills.
> >
> > But with 3 such sensors on the end of a long cable back to the
> > breakout board, probably 7 foot by the time I get it routed, I am
> > concerned with the potential for crosstalk noise in spite of putting
> > a bypass capacitor on the encoder itself.
>
> Just don't source any more current than you actually need.
> I have 3 of these on my spindle encoder, the cable is
> certainly more than 7 feet, and right next to a VFD-powered
> motor.  No problems so far.
> I have the pull-ups at the sensor end, and they are 1 K
> Ohm.  I do have a .1 uF (or possibly 1 uF) cap across the
> power at the sensor end junction block, that is maybe 4"
> from the actual sensors.  I used 4-conductor shielded cable,
> with the shield as the ground return (I know, not best
> practice, but I didn't have 5-conductor shielded cable).
>
> Jon
>
I've had a 6 foot piece of star-quad cable doing that on the little 
monster lathe for several years.  It just works.  And its cooked 
spaghetti pliable to boot. But I just found an identical 3 foot hunk of 
it, running an 8 wire 425oz motor wired parallel, is heating noticeably. 
Unfortunately, the next heavier gauge of that cable has been "out of 
stock" for 4 or 5 years.  Its just enough bigger that its quite hard to 
put a neutrik connector on it.  So I'm stuck using a much stiffer cable 
I can get at the electrical wholesaler in Clarksburg, and bigger 
cable-chain too.

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Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] output sink of the 667 hall effect?

[Gregg Eshelman]

Why not use twisted pair ethernet cable?




From: Gene Heskett 
 To: emc-users@lists.sourceforge.net 
 Sent: Monday, September 12, 2016 11:43 AM
 Subject: [Emc-users] output sink of the 667 hall effect?
   
Greetings all;

I see by the spec sheet that the allegro 667 gear sensor can sink up to 
25 mills.

But with 3 such sensors on the end of a long cable back to the breakout 
board, probably 7 foot by the time I get it routed, I am concerned with 
the potential for crosstalk noise in spite of putting a bypass capacitor 
on the encoder itself.

This noise would be reduced by a lesser amount of current. So, for those 
of you using this device, what value is the resistor are you using for a 
pullup at the breakout board? 

And if using a piece of idc ribbon cable, it seems to make sense to put a 
grounded wire between each of the A|Z|B conductors, making that a 7 
conductor cable rather than a 5. I have around 90 feet of 26 wire ribbon 
I can split off what I need from.

Good idea? Or off the wall & probably will be plagued by noise if I shoot 
for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills with a 
1k pullup.

Time to assemble that motor driver box I believe.
   
 
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Re: [Emc-users] output sink of the 667 hall effect?

[Jon Elson]

On 09/12/2016 12:43 PM, Gene Heskett wrote:
> Greetings all;
>
> I see by the spec sheet that the allegro 667 gear sensor can sink up to
> 25 mills.
>
> But with 3 such sensors on the end of a long cable back to the breakout
> board, probably 7 foot by the time I get it routed, I am concerned with
> the potential for crosstalk noise in spite of putting a bypass capacitor
> on the encoder itself.
Just don't source any more current than you actually need.  
I have 3 of these on my spindle encoder, the cable is 
certainly more than 7 feet, and right next to a VFD-powered 
motor.  No problems so far.
I have the pull-ups at the sensor end, and they are 1 K 
Ohm.  I do have a .1 uF (or possibly 1 uF) cap across the 
power at the sensor end junction block, that is maybe 4" 
from the actual sensors.  I used 4-conductor shielded cable, 
with the shield as the ground return (I know, not best 
practice, but I didn't have 5-conductor shielded cable).

Jon

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Re: [Emc-users] output sink of the 667 hall effect?

[Chris Albertson]

On Mon, Sep 12, 2016 at 3:32 PM, Gene Heskett  wrote:
> On Monday 12 September 2016 14:44:33 Chris Albertson wrote:
>
>> I think the RC filter idea would work OK.  Gear teach are after all a
>> low frequency signal, so a filter made with a cap size for a corner
>> freq of (say) 100KHz will keep RF out of the line.
>>
> I was thinking more in terms of a rail to rail bypass.

If the current goes through a series resistor and there is a capacitor
to ground it is a filter.   You can say "bypass" and many people do
and everyone will know what you mean but the voltage across the cap
will have frequency content defined by the RC constant of the filter.
The product of R and C is what matters.You design this likely by
selecting R based on desired DC characteristics then select C based on
desired frequency cut off.  Just like designing a filter so I call
them filters

In larger factory setting people use driver/receiver chips




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Redondo Beach, California

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Re: [Emc-users] output sink of the 667 hall effect?

[Gene Heskett]

On Monday 12 September 2016 14:44:33 Chris Albertson wrote:

> I think the RC filter idea would work OK.  Gear teach are after all a
> low frequency signal, so a filter made with a cap size for a corner
> freq of (say) 100KHz will keep RF out of the line.
>
I was thinking more in terms of a rail to rail bypass.

> That said the "correct" way to do this is with a pair of
> driver/receiver chips.   If you use RS422 (that is a differential
> signal) you can likely go over a 1/4 mile of trusted pair wire.
>
> As for wire why not use Cat 6 or better for a machine shop cat-6
> shielded.   It is terminated in RJ45 and it's dirt cheap.  And has
> enough pairs (4) for your use.
>
> Also I was reading LinuxCNC docs, it said a spindle encoder needs to
> be quadrature.  You need two sensors for that phase A and B plus a
> third for the index.Cat 6 has four pairs so you can use the 4th
> for power to the sensors.

Thats been the plan from the getgo, and its required for rigid tapping.
Only way to fly IMO.

> As I said, the simple RC filter like you suggested can work but the
> "classic" method for use in a shop filled with high power machines is
> to use a differential single as it is immune to common mode noise,
> then use twisted pair in a sealed that is grounded on ONE end only,

I can switch to shielded cable once I get outside the spindle housing, so 
if its needed, I will.

> On Mon, Sep 12, 2016 at 10:43 AM, Gene Heskett  
wrote:
> > Greetings all;
> >
> > I see by the spec sheet that the allegro 667 gear sensor can sink up
> > to 25 mills.
> >
> > But with 3 such sensors on the end of a long cable back to the
> > breakout board, probably 7 foot by the time I get it routed, I am
> > concerned with the potential for crosstalk noise in spite of putting
> > a bypass capacitor on the encoder itself.
> >
> > This noise would be reduced by a lesser amount of current. So, for
> > those of you using this device, what value is the resistor are you
> > using for a pullup at the breakout board?
> >
> > And if using a piece of idc ribbon cable, it seems to make sense to
> > put a grounded wire between each of the A|Z|B conductors, making
> > that a 7 conductor cable rather than a 5. I have around 90 feet of
> > 26 wire ribbon I can split off what I need from.
> >
> > Good idea? Or off the wall & probably will be plagued by noise if I
> > shoot for a 10 milliamp pullup with a 470 ohm pullup, or even 5
> > mills with a 1k pullup.
> >
> > Time to assemble that motor driver box I believe.

Thanks Chris.
'
> >
> > 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


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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Re: [Emc-users] Plasma Torch Height Control

[Marius Liebenberg]

I have one concern about the use of serial interface for THC. The serial 
components are notoriously slow and sometimes are very far behind the 
real-time events. With THC you need very fast and in time movements. 
Unless there is an interface to the Mesa serial channels, I would be 
cautious to implement a design without proper testing as far as latency 
is concerned.

-- Original Message --
From: "Klemen Živkovič" 
To: "Enhanced Machine Controller (EMC)" 

Sent: 2016-09-12 21:06:28
Subject: Re: [Emc-users] Plasma Torch Height Control

>I can see some plasma machines have serial interface also (
>http://forum.robotsinarchitecture.org/index.php?action=dlattach;topic=232.0;attach=335).
>Also found this thread -
>https://forum.linuxcnc.org/forum/27-driver-boards/21445-rs-485-with-7i76.
>Is serial plasma control over "plasma/serial" component good practice? 
>If
>yes maybe somebody knows is there already such plasma serial component 
>that
>is connected to THC component? Can somebody share or point me to 
>hal/ini
>setup in that case?
>
>regards
>Zhivko
>
>On Mon, Sep 12, 2016 at 7:41 PM, John Thornton  wrote:
>
>>  I'd bet it does both and it may even have a output for ark ok...
>>
>>  JT
>>
>>  On 9/12/2016 8:53 AM, Alexander Brock wrote:
>>  > On 09/11/2016 04:22 PM, John Thornton wrote:
>>  >> Does is have connections to measure the tip voltage?
>>  > I'm not exactly sure, it has a connection named "CNC" and it might 
>>be
>>  > either an input for starting / stopping the cutting or an output 
>>for
>>  > measuring tip voltage.
>>  >
>>  > Best Regards,
>>  > Alexander
>>  >
>>  >
>>  >
>>  > 
>>  --
>>  >
>>  >
>>  > ___
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>>  > Emc-users@lists.sourceforge.net
>>  > https://lists.sourceforge.net/lists/listinfo/emc-users
>>
>>  
>>  --
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>>  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
>>
>--
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>traffic
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>protocols are
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Re: [Emc-users] Plasma Torch Height Control

[Klemen Živkovič]

I can see some plasma machines have serial interface also (
http://forum.robotsinarchitecture.org/index.php?action=dlattach;topic=232.0;attach=335).
Also found this thread -
https://forum.linuxcnc.org/forum/27-driver-boards/21445-rs-485-with-7i76.
Is serial plasma control over "plasma/serial" component good practice? If
yes maybe somebody knows is there already such plasma serial component that
is connected to THC component? Can somebody share or point me to hal/ini
setup in that case?

regards
Zhivko

On Mon, Sep 12, 2016 at 7:41 PM, John Thornton  wrote:

> I'd bet it does both and it may even have a output for ark ok...
>
> JT
>
> On 9/12/2016 8:53 AM, Alexander Brock wrote:
> > On 09/11/2016 04:22 PM, John Thornton wrote:
> >> Does is have connections to measure the tip voltage?
> > I'm not exactly sure, it has a connection named "CNC" and it might be
> > either an input for starting / stopping the cutting or an output for
> > measuring tip voltage.
> >
> > Best Regards,
> > Alexander
> >
> >
> >
> > 
> --
> >
> >
> > ___
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> > 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
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Re: [Emc-users] output sink of the 667 hall effect?

[Chris Albertson]

I think the RC filter idea would work OK.  Gear teach are after all a
low frequency signal, so a filter made with a cap size for a corner
freq of (say) 100KHz will keep RF out of the line.

That said the "correct" way to do this is with a pair of
driver/receiver chips.   If you use RS422 (that is a differential
signal) you can likely go over a 1/4 mile of trusted pair wire.

As for wire why not use Cat 6 or better for a machine shop cat-6
shielded.   It is terminated in RJ45 and it's dirt cheap.  And has
enough pairs (4) for your use.

Also I was reading LinuxCNC docs, it said a spindle encoder needs to
be quadrature.  You need two sensors for that phase A and B plus a
third for the index.Cat 6 has four pairs so you can use the 4th
for power to the sensors.

As I said, the simple RC filter like you suggested can work but the
"classic" method for use in a shop filled with high power machines is
to use a differential single as it is immune to common mode noise,
then use twisted pair in a sealed that is grounded on ONE end only,





On Mon, Sep 12, 2016 at 10:43 AM, Gene Heskett  wrote:
> Greetings all;
>
> I see by the spec sheet that the allegro 667 gear sensor can sink up to
> 25 mills.
>
> But with 3 such sensors on the end of a long cable back to the breakout
> board, probably 7 foot by the time I get it routed, I am concerned with
> the potential for crosstalk noise in spite of putting a bypass capacitor
> on the encoder itself.
>
> This noise would be reduced by a lesser amount of current. So, for those
> of you using this device, what value is the resistor are you using for a
> pullup at the breakout board?
>
> And if using a piece of idc ribbon cable, it seems to make sense to put a
> grounded wire between each of the A|Z|B conductors, making that a 7
> conductor cable rather than a 5. I have around 90 feet of 26 wire ribbon
> I can split off what I need from.
>
> Good idea? Or off the wall & probably will be plagued by noise if I shoot
> for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills with a
> 1k pullup.
>
> Time to assemble that motor driver box I believe.
>
> 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



-- 

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] output sink of the 667 hall effect?

[sam sokolik]

I used a 1k ohm.  but..  We ran that right into a CUI line driver.. (I 
don't think you can get them anymore)  then into a mesa differential 
encoder counter...
http://www.digikey.com/product-search/en?keywords=102-1787-ND

here is our mounting.  You can see the index hole (the index sensor 
isn't mounted in this photo)

http://electronicsam.com/images/matsuura/sensors.jpg

sam

On 9/12/2016 12:43 PM, Gene Heskett wrote:
> Greetings all;
>
> I see by the spec sheet that the allegro 667 gear sensor can sink up to
> 25 mills.
>
> But with 3 such sensors on the end of a long cable back to the breakout
> board, probably 7 foot by the time I get it routed, I am concerned with
> the potential for crosstalk noise in spite of putting a bypass capacitor
> on the encoder itself.
>
> This noise would be reduced by a lesser amount of current. So, for those
> of you using this device, what value is the resistor are you using for a
> pullup at the breakout board?
>
> And if using a piece of idc ribbon cable, it seems to make sense to put a
> grounded wire between each of the A|Z|B conductors, making that a 7
> conductor cable rather than a 5. I have around 90 feet of 26 wire ribbon
> I can split off what I need from.
>
> Good idea? Or off the wall & probably will be plagued by noise if I shoot
> for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills with a
> 1k pullup.
>
> Time to assemble that motor driver box I believe.
>
> Cheers, Gene Heskett


--
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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 reports. http://sdm.link/zohodev2dev
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[Emc-users] output sink of the 667 hall effect?

[Gene Heskett]

Greetings all;

I see by the spec sheet that the allegro 667 gear sensor can sink up to 
25 mills.

But with 3 such sensors on the end of a long cable back to the breakout 
board, probably 7 foot by the time I get it routed, I am concerned with 
the potential for crosstalk noise in spite of putting a bypass capacitor 
on the encoder itself.

This noise would be reduced by a lesser amount of current. So, for those 
of you using this device, what value is the resistor are you using for a 
pullup at the breakout board? 

And if using a piece of idc ribbon cable, it seems to make sense to put a 
grounded wire between each of the A|Z|B conductors, making that a 7 
conductor cable rather than a 5. I have around 90 feet of 26 wire ribbon 
I can split off what I need from.

Good idea? Or off the wall & probably will be plagued by noise if I shoot 
for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills with a 
1k pullup.

Time to assemble that motor driver box I believe.

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] Plasma Torch Height Control

[John Thornton]

I'd bet it does both and it may even have a output for ark ok...

JT

On 9/12/2016 8:53 AM, Alexander Brock wrote:
> On 09/11/2016 04:22 PM, John Thornton wrote:
>> Does is have connections to measure the tip voltage?
> I'm not exactly sure, it has a connection named "CNC" and it might be
> either an input for starting / stopping the cutting or an output for
> measuring tip voltage.
>
> Best Regards,
> Alexander
>
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Re: [Emc-users] IMTS Chicago

[Kirk Wallace]

On 09/12/2016 10:04 AM, Stuart Stevenson wrote:
> We are planning to be there early in the morning so we can spend the day
> walking through checking STUFF.

Thanks for rubbing it in.:)


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Re: [Emc-users] IMTS Chicago

[Stuart Stevenson]

We are planning to be there early in the morning so we can spend the day
walking through checking STUFF.

On Sep 12, 2016 10:54 AM, "John Kasunich"  wrote:

> Let me know when you expect to be doing the HGR run.
> Not sure if I can get off work, but I'll try.
> (I live 20 minutes from HGR.)
>
>
> On Mon, Sep 12, 2016, at 10:12 AM, Stuart Stevenson wrote:
> > Standing here ready to go in and wondering if anyone on the list is here
> > today.
> > Am planning an HGR run tomorrow.
> > Kim K. is here with me.
> > Would like to meet up with any LinuxCNC users here.
> > Thanks
> > 
> --
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>
>
> --
>   John Kasunich
>   jmkasun...@fastmail.fm
>
> 
> --
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> 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] touch probe

[Gene Heskett]

On Monday 12 September 2016 10:42:38 andy pugh wrote:

> On 12 September 2016 at 15:27, Gene Heskett  
wrote:
> > > Feed-hold can be masked and unmasked with the G53 command, feed
> > > inhibit can't.
> >
> > I see.  Possibly a huge difference. Generally, my use of g53 is to
> > reset the user coordinates back to sane values
>
> Sorry, my error. I meant M53.
>
> http://linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m53

Hmm, some interesting things there, and not well studied by me yet. One 
snippet looks useful, as in a single command to configure the machine 
either as metric, or imperial. Too often I find myself using a 
calculator, which of course is subject to 'bitton' push errors. :)

If and when this Sheldon is actually making swarf, I might explore that.  
But that is not going to be until November at my present rate of 
progress. I made the alu piece to hold the gear detectors, but haven't 
cut the pockets to put them in yet, and Go-2 glued a small piece of 
screw to the side face of the big gear for an index pulse. In the 
process found the upper drive belts were "lumpy" and not very tight. 
They've been loose long enough to have worn away a casting flange at the 
bottom of the bed, or in the top of the foot, hard to see. Putting some 
tension on them reduced the rumble & vibration quite a bit.  Major 
disassembly of the headstock end of the lathe is required to replace 
them.

But I now have the x axis ball screw well shielded from swarf. I machined 
a 1/8" deep ledge in the top of the crossfeed and glued a 1x.125" strip 
of stock alu about 15" long into the recess, so its covered from the 
top, and the saddle had bed clearance enough that I could do the same 
below the screw but with 24 gauge metal.

Made new way wipers out of an old felt hat. They work sweet, keeping a 
film of oil on the ways. I can push it full length of the bed with about 
a 3 lb push.

Taking the OEM apron off leaves room to put a real, full length gib on 
the front instead of those two postage stamp sized bits of steel.  Wear 
on the bottom lip of the bed is considerable as the right hand one was 
used for a carriage lock, and had been over tightened, actually bending 
the bolt such that there was no place you could turn it that was 
actually free.  So my brass piece is going to reach beyond that wear, 
and will have several more bolts to hold it. It will need a bit of 
shimming for the proper fit of course, but that has to be a considerable 
improvement over the state it was in when we set it down in the u-haul. 

The new apron is a 1/2" thick alu slab about the same face size as the 
old apron, with a window cut in the center for the x motor to be mounted 
on an 1/8" sliding plate for timing belt tension adjustments, so the new 
Z screw has to be hung about as high as I can get it so it clears the 
motor. Higher also helps reduce the leverage on the saddle when its 
pushing hard, so that has to be a Good Thing.

I'll have to make a pad to fit between the 2505 nut holder and this slab 
of alu, and all the spacing pads to allow it to fit behind another slab 
of 1/2" alu bolted to where the qcgb was, with the Z motor on the front 
of the slab, driving the Z screw thru a pair of 40 tooth timing pulleys. 

I've some bellows type covers coming to cover the Z screw with but I'll 
have to make the pieces the ends are to be clamped onto.  That size is 
TBD until they get here, supposedly sometime this week.

There will be, like your Holbrook, lots of one off parts in this puppy.
All of which take time to make. :(  The past thing I'll change out is the 
spindle motor. I have a steel box big enough to hold the xy motors 
drivers and psu's & keep swarf out of those, but it looks like the only 
place for the vfd to drive the 1 horse motor is under the left hand 
drawer. So I'll have to make brackets for that.

But ATM, working on the encoder and trying to figure out how to get the 
wire out of the head but out of sight & safe from being chewed up by a 
spinning part.

Which brings up another question: How oil resistant is common Beldon 
ribbon cable?  Because its flat, I may use that, ground on one edge 
wire, +5 for the hall effect stuff on the other edge, and the ABZ in the 
middle. But it is going to get oily in there.  Hence the question.

Thanks Andy.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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planning reports. http://sdm.link/zohodev2dev

Re: [Emc-users] IMTS Chicago

[John Kasunich]

Let me know when you expect to be doing the HGR run.
Not sure if I can get off work, but I'll try.
(I live 20 minutes from HGR.)


On Mon, Sep 12, 2016, at 10:12 AM, Stuart Stevenson wrote:
> Standing here ready to go in and wondering if anyone on the list is here
> today.
> Am planning an HGR run tomorrow.
> Kim K. is here with me.
> Would like to meet up with any LinuxCNC users here.
> Thanks
> --
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> https://lists.sourceforge.net/lists/listinfo/emc-users


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  jmkasun...@fastmail.fm

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Re: [Emc-users] touch probe

[andy pugh]

On 12 September 2016 at 15:27, Gene Heskett  wrote:

> > Feed-hold can be masked and unmasked with the G53 command, feed
> > inhibit can't.
>
> I see.  Possibly a huge difference. Generally, my use of g53 is to reset
> the user coordinates back to sane values


Sorry, my error. I meant M53.

http://linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m53

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Re: [Emc-users] touch probe

[Gene Heskett]

On Monday 12 September 2016 08:25:37 andy pugh wrote:

> On 11 September 2016 at 16:08, Gene Heskett  
wrote:
> > > > motion.feed-inhibit
>
> ...
>
> > > motion.feed-hold
>
> ...
>
> > "what is the difference in how they work?"
>
> Feed-hold can be masked and unmasked with the G53 command, feed
> inhibit can't.

I see.  Possibly a huge difference. Generally, my use of g53 is to reset 
the user coordinates back to sane values, so its not a command in 
every .ngc file I write. I don't recall that I have anything connected 
to either in my .hal files. Just rechecked all 3 machines, no 
connections.

Thanks Andy.

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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[Emc-users] IMTS Chicago

[Stuart Stevenson]

Standing here ready to go in and wondering if anyone on the list is here
today.
Am planning an HGR run tomorrow.
Kim K. is here with me.
Would like to meet up with any LinuxCNC users here.
Thanks
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Re: [Emc-users] Plasma Torch Height Control

[Alexander Brock]

On 09/11/2016 04:22 PM, John Thornton wrote:
> Does is have connections to measure the tip voltage?

I'm not exactly sure, it has a connection named "CNC" and it might be
either an input for starting / stopping the cutting or an output for
measuring tip voltage.

Best Regards,
Alexander



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Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

[Sarah Armstrong]

for info ,   anyone used or seen  this
http://ostan.cz/IR_protocol_analyzer/

i'm just about to start digging on my renshaw' probes , a bit more



On 8 September 2016 at 17:07, Jon Elson  wrote:

> On 09/08/2016 09:56 AM, Florian Rist wrote:
> > Hi Jon
> >
> >> Yes, I thought about building a receiver out of various
> >> parts, but there are application specific parts that combine
> >> all this in one unit.  Most are made with 38 KHz band pass
> >> filters for VCR remote controls,
> > Yes, that's why I didn't even look into theses integrated devices.
> >
> >> but the QSE159 does not
> >> have the BPF, looked to be sensitive enough, and was really
> >> cheap ($1.06)
> > Indeed, interesting.
> >
> > Not sure if it is sensitive enough, 0.25 mW/cm² worst case translates to
> > 2.5W/m², that's quite a lot. But, now that I started looking, there are
> > quite a few similar integrated devices available, some with much high
> > sensitivity down to at least 10µW/cm². However most are lacking the
> > Schmitt-trigger of the QSE159, nice part, that you found, I'm going to
> > get one, too.
> >
> >
> I have no idea what the radiated power of the Blum probe is,
> but it has 12 big surface-mount LEDs arranged around the
> periphery.  The QSE sensor picks it up very well out past
> 6", which is all the sensitivity I will need.
>
> Jon
>
> 
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Re: [Emc-users] touch probe

[andy pugh]

On 11 September 2016 at 16:08, Gene Heskett  wrote:

> > > motion.feed-inhibit
>
...

> > motion.feed-hold

...

> "what is the difference in how they work?"


Feed-hold can be masked and unmasked with the G53 command, feed inhibit
can't.

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