Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Monday 28 January 2013 02:34:17 MC Cason did opine:
Message additions Copyright Monday 28 January 2013 by Gene Heskett

> On 01/27/2013 06:19 PM, Gene Heskett wrote:
> > Greetings all;
> > 
> > Does anyone know where I can order just a few, I need 3, of the above
> > bolt without a $30 to $50 minimum order?
> > 
> > The bearing blocks for this screw are machined only for socket head
> > bolts, and normal 10mm hex heads do not leave room to get a wrench or
> > socket on them to properly tighten them.
> > 
> > Locally, there are no socket head metric bolts stocked at all.  None,
> > nada, zip.
> > 
> > Its either that, or cut me some bushings out of 1/8" pipe & use 40mm
> > long bolts which I have, and get get up to 50mm long at Lowes.  But
> > that would be my 2nd choice.
> > 
> > Thanks guys.
> > 
> > Cheers, Gene
> 
>Gene,
> 
>if you can use SS, here are a few about half way down the page:
> http://www.albanycountyfasteners.com/Socket_Head_Cap_Screw_6MM_A2_Stainl
> ess_Steel_p/507.htm
> 
>I haven't ordered directly from their website, but I have been
> ordering 4-40, and M3x0.5 nylocks from them through Ebay, and I'm quite
> satisfied with them.  I've been buying bags of between 100, and 250,
> nylocks, for just a couple of bucks, with free shipping.  4 days from
> NY, to Southern AR.

I have a long history in broadcasting with SS, much of it unpleasant 
because of its tendency to gaul, freeze and require bolt breaking (3/8" 
bolts) strength just so it can be replaced, anywhere up to 2000' up in the 
air.  So I'm not real fond of putting an SS bolt into a casting that isn't 
readily replaceable.  These black iron grade 12's will be just fine.  They 
won't be out in the weather, at least on my watch. :)

Thanks.

Cheers, Gene
-- 
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Monday 28 January 2013 02:25:34 Drew Rogge did opine:
Message additions Copyright Monday 28 January 2013 by Gene Heskett

> Hmmm. I'm in the San Francisco bay area. Hard to get further away from
> WV than that. It did take like 5 days to get them though.
> 
> Ahhh... I see I had them shipped to work via UPS. Home delivery is
> usualy a bit more than business :-( Yep, about $3 more to ship to a
> residential address vs. commercial. I guess that's another plus point
> to having a job :-) Drew
 
I had several of those, got my SS card in '47 IIRC.  These are supposed to 
be my golden years.  But the only gold is my wedding ring and one tooth.  
TBT, getting old isn't for wimps.  Some mornings its a chore just to gnaw 
thru the straps and get up to pee. :)  OTOH, YOLO, unless your name is 
Shirley McClain. ;-)

Cheers, Gene
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[MC Cason]

On 01/27/2013 06:19 PM, Gene Heskett wrote:
> Greetings all;
>
> Does anyone know where I can order just a few, I need 3, of the above bolt
> without a $30 to $50 minimum order?
>
> The bearing blocks for this screw are machined only for socket head bolts,
> and normal 10mm hex heads do not leave room to get a wrench or socket on
> them to properly tighten them.
>
> Locally, there are no socket head metric bolts stocked at all.  None, nada,
> zip.
>
> Its either that, or cut me some bushings out of 1/8" pipe & use 40mm long
> bolts which I have, and get get up to 50mm long at Lowes.  But that would
> be my 2nd choice.
>
> Thanks guys.
>
> Cheers, Gene

   Gene,

   if you can use SS, here are a few about half way down the page:
http://www.albanycountyfasteners.com/Socket_Head_Cap_Screw_6MM_A2_Stainless_Steel_p/507.htm

   I haven't ordered directly from their website, but I have been 
ordering 4-40, and M3x0.5 nylocks from them through Ebay, and I'm quite 
satisfied with them.  I've been buying bags of between 100, and 250, 
nylocks, for just a couple of bucks, with free shipping.  4 days from 
NY, to Southern AR.

-- 
MC Cason
Associate Developer - Eagle3D, Created by Matthias Weißer
Lathe Electronic Edge Finder - raccoonelectronics.com



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Re: [Emc-users] Servo tuning MESA 7i48 cards

[TJoseph Powderly]

On 01/27/2013 03:24 AM, Marshland Engineering wrote:
> I'm running Colpey servo drives but I cannot get them tuned in with
> LinuxCNC.
>
> The servo is a current drive with a +- 10 volt input.
> As there is not much load on the drive so a +-0.4 volt will swing the motor
> at full speed.
>
> The manual for the drive says to supply a stepped input to it and tune the
> feedback pot till the motor steps nicely without overshoot. Done this with a
> 1 HZ signal generator.
>
> Now when I'm runing it with LinucCNC, I get a lot of overshoot and
> eventually, if the step is big enougth, a following error.
>
> I've tried P, I and D  values varying from .05 to 5 and output voltages from
> 1-10 and none seem to make any real improvement.
>
> I'm stuck.
>
> Thanks Wallace
>
>
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Are you in Torque Mode?

refer to http://www.copleycontrols.com/motion/pdf/412.pdf

there is no tacho feedback for torque mode

there is no 'step test' for torque mode

( and step means an instant velocity command change form 0 to maximum used , 
like 0 to 8V )
no frequency is needed , the test uses one edge and a storage scope.

doesnt matter at all if you are in torque mode, set by the s2 switch from 
outside the case

"""
TORQUE MODE

For transconductance:
( Iout / Vref ) = Ipeak / 10V:
1) Set S2 ON
2) Set Ref Gain fully CW
3) Set Loop Gain fully CCW.
4) To increase gain, turn Loop Gain CW. To decrease gain,
turn Ref Gain CCW.
"""
in this mode torque is purely a linear function of Vref ( Vcmd in 
Fanuc-ese )

tomp


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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Drew Rogge]

Hmmm. I'm in the San Francisco bay area. Hard to get further away from WV than 
that. It did take like 5 days to get them though.

Ahhh... I see I had them shipped to work via UPS. Home delivery is usualy a bit 
more than business :-(
Yep, about $3 more to ship to a residential address vs. commercial. I guess 
that's another plus point to having a job :-)
Drew

On 1/27/13 5:42 PM, Gene Heskett wrote:

>
> Actually about $13.50 from wherever they are to WV, I ordered 20 so I have
> some for the next time.
>
> Thanks Drew.
>
> And that should close out this thread.  Thanks for the offer John Stewart,
> it was/is appreciated.
>
> Cheers, Gene
>

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:48:05 Steve Blackmore did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> On Sun, 27 Jan 2013 19:19:11 -0500, you wrote:
> >Greetings all;
> >
> >Does anyone know where I can order just a few, I need 3, of the above
> >bolt without a $30 to $50 minimum order?
> 
> I can get those at my local hardware store or "home depot" type store
> and I've also got 25+ of them in stock. If your in no mad rush I'll send
> you some - contact me off line and we can sort it out.
> 
> Conversely I can't get 10-32 or any other "USA" preferred threaded
> fixings without ordering a box full at a ridiculous price.  A complete
> PITA :(
> 
> About time you guys joined the rest of the world and embraced
> metrication .
> 
> Steve Blackmore

I signed a We The People petition on that just last week.  I understand 
that the USA and Zimbabwa are the lone holdouts, and IMO it is one of the 
contributing factors to the US's descent into 3rd world status.  When I 
grew up, we were the greatest...

Cheers, Gene
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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My views 

I think she must have been very strictly brought up, she's so desperately
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Re: [Emc-users] Help, out of inputs on my parport

[Chris Radek]

On Sun, Jan 27, 2013 at 06:14:56PM -0500, Kip wrote:
> Greetings all!  My shift registers seem to be working well as a cheap
> and easy port expander!   Apologies for how long it took me to write it

That's really cool.  A lot of people have asked about a simple
scheme such as this over the years, and the responses have always
been like: yeah - ought to be possible - doesn't seem too hard.

A writeup is worth a lot more than that!

While list archives are forever, it might be nice if you'd also make
a page on wiki.linuxcnc.org sharing this.

Thanks!
Chris

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Steve Blackmore]

On Sun, 27 Jan 2013 19:19:11 -0500, you wrote:

>Greetings all;
>
>Does anyone know where I can order just a few, I need 3, of the above bolt 
>without a $30 to $50 minimum order?

I can get those at my local hardware store or "home depot" type store
and I've also got 25+ of them in stock. If your in no mad rush I'll send
you some - contact me off line and we can sort it out. 

Conversely I can't get 10-32 or any other "USA" preferred threaded
fixings without ordering a box full at a ridiculous price.  A complete
PITA :(

About time you guys joined the rest of the world and embraced
metrication .

Steve Blackmore
--

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:38:11 Drew Rogge did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> Try boltdepot.com:
> 
> http://www.boltdepot.com/Product-Details.aspx?product=6543

Your search fu is better than mine.  Thanks.
 
> Not sure what shipping would be but probably < $10. I bought about $45$
> of smaller metric SS socket head cap screws and shipping was $9.18.
> 
> Drew

Actually about $13.50 from wherever they are to WV, I ordered 20 so I have 
some for the next time.

Thanks Drew.

And that should close out this thread.  Thanks for the offer John Stewart, 
it was/is appreciated.

Cheers, Gene
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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My web page:  is up!
My views 

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Greg Bernard]

Yeah, Ace is pretty good for that sort of thing. They have all sorts of odd 
fasteners, springs, o-rings and such. Way overpriced but a lifesaver when you 
need a part in a hurry.

 
+++
"Anyone who believes exponential growth can go on forever in a finite world is 
either a madman or an economist."

        -Kenneth Boulding, economist




>
> From: Jon Elson 
>To: Enhanced Machine Controller (EMC)  
>Sent: Sunday, January 27, 2013 7:05 PM
>Subject: Re: [Emc-users] Need socket head 6x1mm by 35mm bolts
> 
>Gene Heskett wrote:
>> Greetings all;
>>
>> Does anyone know where I can order just a few, I need 3, of the above bolt 
>> without a $30 to $50 minimum order?
>>
>> The bearing blocks for this screw are machined only for socket head bolts, 
>> and normal 10mm hex heads do not leave room to get a wrench or socket on 
>> them to properly tighten them.
>>
>> Locally, there are no socket head metric bolts stocked at all.  None, nada, 
>> zip.
>>
>>  
>Gee, our local Ace hardware store probably has these.  They have a 
>limited selection of
>metric SHCS, but they do have them in pull-out trays with plastic 
>pockets.  They probably
>will be $1.50 each but you only need 3.
>
>Jon
>
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[jeremy youngs]

wow im kinda surprised as i went there for those exact srews to mount
my drives . hmmm go figure :)


On Sun, Jan 27, 2013 at 8:29 PM, Gene Heskett  wrote:
> On Sunday 27 January 2013 20:24:08 jeremy youngs did opine:
> Message additions Copyright Sunday 27 January 2013 by Gene Heskett
>
>> gene
>> is there a tsc around your parts?
>> they have "the stuff you need out there"
>> ours carries the bolts yuo are looking for at about .80 ea.
>> good luck :)
>
> All this one has is the std 10mm hex head and some round headed stuff that
> needed at least a #3 phillips.  9/16 diameter heads on 8mm, too big in
> diameter.  Very little choice in 6x1mm stuff.  I'm good friends with those
> folks, but I did lament about the poor choices in metrics on my way out.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page:  is up!
> My views
> 
> Fill what's empty, empty what's full, scratch where it itches.
> -- Alice Roosevelt Longworth
> I was taught to respect my elders, but its getting
> harder and harder to find any...
>
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-- 
jeremy youngs

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:24:08 jeremy youngs did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> gene
> is there a tsc around your parts?
> they have "the stuff you need out there"
> ours carries the bolts yuo are looking for at about .80 ea.
> good luck :)

All this one has is the std 10mm hex head and some round headed stuff that 
needed at least a #3 phillips.  9/16 diameter heads on 8mm, too big in 
diameter.  Very little choice in 6x1mm stuff.  I'm good friends with those 
folks, but I did lament about the poor choices in metrics on my way out.

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

Fill what's empty, empty what's full, scratch where it itches.
-- Alice Roosevelt Longworth
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Drew Rogge]

Try boltdepot.com:

http://www.boltdepot.com/Product-Details.aspx?product=6543

Not sure what shipping would be but probably < $10. I bought about $45$ 
of smaller metric SS socket head cap screws and shipping was $9.18.

Drew

On 01/27/2013 04:49 PM, Ralph Stirling wrote:
> mcmaster.com is my go-to source for all fasteners.  Cheap, fast shipping, no 
> minimums.
>
> -- Ralph
> 
> From: Gene Heskett [ghesk...@wdtv.com]
> Sent: Sunday, January 27, 2013 4:19 PM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Need socket head 6x1mm by 35mm bolts
>
> Greetings all;
>
> Does anyone know where I can order just a few, I need 3, of the above bolt
> without a $30 to $50 minimum order?
>
> The bearing blocks for this screw are machined only for socket head bolts,
> and normal 10mm hex heads do not leave room to get a wrench or socket on
> them to properly tighten them.
>
> Locally, there are no socket head metric bolts stocked at all.  None, nada,
> zip.
>
> Its either that, or cut me some bushings out of 1/8" pipe & use 40mm long
> bolts which I have, and get get up to 50mm long at Lowes.  But that would
> be my 2nd choice.
>
> Thanks guys.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>   soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page:  is up!
> My views
> 
> A computer without Windows is like a fish without a bicycle
> I was taught to respect my elders, but its getting
> harder and harder to find any...
>
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[jeremy youngs]

gene
is there a tsc around your parts?
they have "the stuff you need out there"
ours carries the bolts yuo are looking for at about .80 ea.
good luck :)
-- 
jeremy youngs

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:13:43 Jon Elson did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> Gene Heskett wrote:
> > Greetings all;
> > 
> > Does anyone know where I can order just a few, I need 3, of the above
> > bolt without a $30 to $50 minimum order?
> > 
> > The bearing blocks for this screw are machined only for socket head
> > bolts, and normal 10mm hex heads do not leave room to get a wrench or
> > socket on them to properly tighten them.
> > 
> > Locally, there are no socket head metric bolts stocked at all.  None,
> > nada, zip.
> 
> Gee, our local Ace hardware store probably has these.  They have a
> limited selection of
> metric SHCS, but they do have them in pull-out trays with plastic
> pockets.  They probably
> will be $1.50 each but you only need 3.
> 
> Jon
 
I considered that Jon, but my 'local' Ace is 24 miles, one way.  Now if 
they had something else I need besides their crappy Hanson (cast iron 
anybody) taps, it might be worth the run.

Cheers, Gene
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:10:33 Ralph Stirling did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> mcmaster.com is my go-to source for all fasteners.  Cheap, fast
> shipping, no minimums.
> 
> -- Ralph

Thanks Ralph, and if I can find the login/pw again I did have an account 
there.  I was on their site earlier today, but the search didn't 'hit' very 
well.

Cheers, Gene
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

On Sunday 27 January 2013 20:02:43 John Stewart did opine:
Message additions Copyright Sunday 27 January 2013 by Gene Heskett

> Gene;
> 
> These are available locally, but I have a few steel 30mm, 40mm or a
> bunch of 50mm steel socket head cap screws. (Measured from under the
> head, not total length, of course)
> 
Correct for those I believe.

> The 50mm ones - I have a whole bunch;  just slightly under half the
> shank is threaded. The 30 mm ones are fully threaded, the 40mm ones are
> 24mm thread, 15mm straight shank (roughly measured)

I can use the 40's just fine, but I think the 30's might be a bit short, 
but lemme go out in the morning and check the tail block for sure. To get 
it about centered in the space the old screw ran in, I took .140" off the 
bottoms of both blocks on the mill.  When I find out, I'll PM your my PO 
address.
 
> send me your shipping address, and I'll put some in the mail Monday, or
> Tuesday AM.

It will be late Monday morning my time before I have a measurement.
 
> John A. Stewart.

Thanks a bunch John.
 
> On 2013-01-27, at 7:19 PM, Gene Heskett wrote:
> > Greetings all;
> > 
> > Does anyone know where I can order just a few, I need 3, of the above
> > bolt without a $30 to $50 minimum order?

Cheers, Gene
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Jon Elson]

Gene Heskett wrote:
> Greetings all;
>
> Does anyone know where I can order just a few, I need 3, of the above bolt 
> without a $30 to $50 minimum order?
>
> The bearing blocks for this screw are machined only for socket head bolts, 
> and normal 10mm hex heads do not leave room to get a wrench or socket on 
> them to properly tighten them.
>
> Locally, there are no socket head metric bolts stocked at all.  None, nada, 
> zip.
>
>   
Gee, our local Ace hardware store probably has these.  They have a 
limited selection of
metric SHCS, but they do have them in pull-out trays with plastic 
pockets.  They probably
will be $1.50 each but you only need 3.

Jon

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Jason Burton]

+1 on mcmaster. Though it looks like John has you covered.
 On Jan 27, 2013 6:52 PM, "Ralph Stirling" 
wrote:

> mcmaster.com is my go-to source for all fasteners.  Cheap, fast shipping,
> no minimums.
>
> -- Ralph
> 
> From: Gene Heskett [ghesk...@wdtv.com]
> Sent: Sunday, January 27, 2013 4:19 PM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Need socket head 6x1mm by 35mm bolts
>
> Greetings all;
>
> Does anyone know where I can order just a few, I need 3, of the above bolt
> without a $30 to $50 minimum order?
>
> The bearing blocks for this screw are machined only for socket head bolts,
> and normal 10mm hex heads do not leave room to get a wrench or socket on
> them to properly tighten them.
>
> Locally, there are no socket head metric bolts stocked at all.  None, nada,
> zip.
>
> Its either that, or cut me some bushings out of 1/8" pipe & use 40mm long
> bolts which I have, and get get up to 50mm long at Lowes.  But that would
> be my 2nd choice.
>
> Thanks guys.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page:  is up!
> My views
> 
> A computer without Windows is like a fish without a bicycle
> I was taught to respect my elders, but its getting
> harder and harder to find any...
>
>
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Re: [Emc-users] Another 5i25-g540 question.

[Peter C. Wallace]

On Sun, 27 Jan 2013, John Stewart wrote:

> Date: Sun, 27 Jan 2013 19:40:37 -0500
> From: John Stewart 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: [Emc-users] Another 5i25-g540 question.
> 
> I'm having pretty good success with the 5i25/g540 setup - thanks to emails 
> and pointers on this list earlier.
>
> (I will send along my hal/ini files once it is running - it has been an 
> interesting time figuring this out. There is a light at the end of the 
> tunnel, getting quite bright)
>
> Question: one major problem is that the x-axis motion is reversed. Other than 
> switching some wires, is there a method of telling the 5i25/g540 to reverse 
> it's motion?
>
> Now, I am a diagnosed dyslexic, but even I know when a part is coming out 
> reversed. ;-)
>
> Thank you,
>
> John A. Stewart.
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Another way is to invert the DIR pin output polarity. This is done by 
determining which GPIO bit your X DIR signal is on and setting the 
invert_output attribute of that GPIO bit.

something like:

setp  hm2_[HOSTMOT2](BOARD).0.GPIO.004.invert_output true

Peter Wallace
Mesa Electronics

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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Jon Elson]

Peter C. Wallace wrote:
> If the drives are indeed in torque mode (which is hard to reconcile with 
> tuning the drives step response via a potentiometer), It may be very hard to 
> tune a bare unloaded motor at a linuxCNC 1 KHz sample rate (~300 hz bandwidth)
>   
You're right.  If he THINKS the servo amps are in torque mode, but the 
jumper is
actually in velocity mode, it will be quite hard to make work.  The 
velocity integrator
will be trying to make it run away all the time.  The Copley 400-series 
has a
jumper inside the case to select velocity or torque mode.

Jon

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Re: [Emc-users] Another 5i25-g540 question.

[sam sokolik]

The easiest way is to negate the SCALE.

sam
On 01/27/2013 06:40 PM, John Stewart wrote:
> I'm having pretty good success with the 5i25/g540 setup - thanks to emails 
> and pointers on this list earlier.
>
> (I will send along my hal/ini files once it is running - it has been an 
> interesting time figuring this out. There is a light at the end of the 
> tunnel, getting quite bright)
>
> Question: one major problem is that the x-axis motion is reversed. Other than 
> switching some wires, is there a method of telling the 5i25/g540 to reverse 
> it's motion?
>
> Now, I am a diagnosed dyslexic, but even I know when a part is coming out 
> reversed. ;-)
>
> Thank you,
>
> John A. Stewart.
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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[Ralph Stirling]

mcmaster.com is my go-to source for all fasteners.  Cheap, fast shipping, no 
minimums.

-- Ralph

From: Gene Heskett [ghesk...@wdtv.com]
Sent: Sunday, January 27, 2013 4:19 PM
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Need socket head 6x1mm by 35mm bolts

Greetings all;

Does anyone know where I can order just a few, I need 3, of the above bolt
without a $30 to $50 minimum order?

The bearing blocks for this screw are machined only for socket head bolts,
and normal 10mm hex heads do not leave room to get a wrench or socket on
them to properly tighten them.

Locally, there are no socket head metric bolts stocked at all.  None, nada,
zip.

Its either that, or cut me some bushings out of 1/8" pipe & use 40mm long
bolts which I have, and get get up to 50mm long at Lowes.  But that would
be my 2nd choice.

Thanks guys.

Cheers, Gene
--
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 soap, ballot, jury, and ammo. Please use in that order."
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My views

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harder and harder to find any...

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Re: [Emc-users] Need socket head 6x1mm by 35mm bolts

[John Stewart]

Gene;

These are available locally, but I have a few steel 30mm, 40mm or a bunch of 
50mm steel socket head cap screws. (Measured from under the head, not total 
length, of course)

The 50mm ones - I have a whole bunch;  just slightly under half the shank is 
threaded. The 30 mm ones are fully threaded, the 40mm ones are 24mm thread, 
15mm straight shank (roughly measured)

send me your shipping address, and I'll put some in the mail Monday, or Tuesday 
AM.

John A. Stewart.


 
On 2013-01-27, at 7:19 PM, Gene Heskett wrote:

> Greetings all;
> 
> Does anyone know where I can order just a few, I need 3, of the above bolt 
> without a $30 to $50 minimum order?
> 


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[Emc-users] Another 5i25-g540 question.

[John Stewart]

I'm having pretty good success with the 5i25/g540 setup - thanks to emails and 
pointers on this list earlier.

(I will send along my hal/ini files once it is running - it has been an 
interesting time figuring this out. There is a light at the end of the tunnel, 
getting quite bright)

Question: one major problem is that the x-axis motion is reversed. Other than 
switching some wires, is there a method of telling the 5i25/g540 to reverse 
it's motion? 

Now, I am a diagnosed dyslexic, but even I know when a part is coming out 
reversed. ;-)

Thank you,

John A. Stewart.  
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[Emc-users] Need socket head 6x1mm by 35mm bolts

[Gene Heskett]

Greetings all;

Does anyone know where I can order just a few, I need 3, of the above bolt 
without a $30 to $50 minimum order?

The bearing blocks for this screw are machined only for socket head bolts, 
and normal 10mm hex heads do not leave room to get a wrench or socket on 
them to properly tighten them.

Locally, there are no socket head metric bolts stocked at all.  None, nada, 
zip.

Its either that, or cut me some bushings out of 1/8" pipe & use 40mm long 
bolts which I have, and get get up to 50mm long at Lowes.  But that would 
be my 2nd choice.

Thanks guys.

Cheers, Gene
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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My views 

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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Chris Morley]

> From: marshl...@marshland.co.nz
> To: emc-users@lists.sourceforge.net
> Date: Mon, 28 Jan 2013 08:10:21 +1300
> Subject: Re: [Emc-users] Servo tuning MESA 7i48 cards
> 
> Can you tell me what your PID values you have in your setup? I know mine 
> won't bet the same but it gives me an idea on the range.
> 
> Thanks Wallace 
> 
> 

Note while this could be useful for comparison, it depends on what you set your
scale to represent. Voltage? axis velocity?, torque?
The PID setting are greatly different for each representation.
Of course even then they can be quite different.

I remember Peter pointing that out when I was building PNCconf
At the time I think he recommended axis velocity.

Chris M
  
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Re: [Emc-users] backplot setup

[Chris Morley]

You didn't mention if this was in AXIS or gladeVCP - but the answer could be 
the same.
Since you are using a  5 axis machine with rotary axis there is an INI setting 
to look at.
Under the [DISPLAY] heading
GEOMETRY=XYZA etc

Geometry sets how the backplot displays rotary movement.
More specifically what order the translations are done.
Beyond that I have never seen a really clear explanation of how it works,
But it's easy to try different settings.

Both AXIS and gladeVCL's HAL_gremlin use this, but I wouldn't have thought
this would give you an offset in X only.
Are you sure it's always X?

If you were talking gladeVCP I would have said this sounds like loading a 
program
then touching off in X. If you don't explicitly tell HAL_gremlin that you moved 
the origin,
(by reloading the plot) then it plots where it thinks the origin is, leading to 
this offset showing.
 
Chris M

> From: tomaz_...@hotmail.com
> To: emc-users@lists.sourceforge.net
> Date: Sun, 27 Jan 2013 10:40:43 +
> Subject: [Emc-users] backplot setup
> 
> 
> I have a little problem to setup correctly backplot preview, which is shown 
> offsetted for a certain distance from gcode preview (only by X axis). I 
> assume I messed up something in DISPLAY section or this could be also somehow 
> related to 5axis kinematics that I use.My machine is 5axis (bridge 
> construction), which has X, Y, Z, B (around Y and U) , C (around Z) , U 
> (parallel with Y).
> 
> 
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Re: [Emc-users] Help, out of inputs on my parport

[Kip]

Greetings all!  My shift registers seem to be working well as a cheap
and easy port expander!   Apologies for how long it took me to write it
up, but we are currently in the middle of the FIRST Robotics Challenge
build season, so I'm spending almost every evening mentoring high school
students.

I've attached a schematic of the circuit used.  Notice it creates 16
output and 16 input lines using only 3 output and 1 input pin on the
parallel port.

I also attached the .comp file to drive it.  It count base-thread ticks
for timing.  I have it configured to update every 1 ms with my system,
but this is configurable.  While 1 ms is too slow for micro-stepping, it
is plenty fast enough to detect the pulses from my cooling fan
tachometers, turning pumps on and off, reading control panel buttons,
and blinking status LEDs.

The complete write-up can be found here:

http://www.shafferhouse.org/linuxcnc/LinuxCNCShiftRegisters.pdf

It goes into a lot of detail that is probably too basic for most of the
readers of this list, but please let me know if there are things you
would like me to add.

Enjoy!
-Kip

On Thu, 2013-01-03 at 07:18 +0200, Marius Liebenberg wrote:
> That sounds impressive. I am looking forward to seeing it.
> 
> On 2013/01/02 10:03 PM, Kip Shaffer wrote:
> > Absolutely!  I just finished wiring up the real (non-prototype) interface
> > card yesterday.  As soon as I make sure everything is working, I'll post
> > the wiring diagram and the HAL module.  It appears that even the
> > high-latency (1ms) shift register lines are fast enough to directly read
> > the tachometer signal from my cooling fans (120 Hz)!
> >
> >
> >
> >
> > On Wed, Jan 2, 2013 at 2:11 PM, Marius Liebenberg 
> > wrote:
> >
> >> Kip,
> >> Would you be willing to share your module. I am in need of a similar
> >> solution.
> >> Marius
> >>
> >> On 2012/12/28 02:54 PM, Kip Shaffer wrote:
> >>> Gene,
> >>>  Not sure if you would be interested in the approach I'm using, but it
> >>> may help you or others who are in a similar predicament.
> >>>
> >>> You can use shift registers to add as many additional lines as you want.
> >>>For example, you can take 3 output lines on your parallel port, and
> >> turn
> >>> them into 8, 16, 24 or more output lines.  Shift registers come in two
> >>> varieties: Serial-In Parallel-Out, which you would use to create more
> >>> output lines, and Parallel-In Serial-Out which you can use to create more
> >>> input lines.
> >>>
> >>> I wrote a HAL module to implement my setup, which uses 4 pins on the
> >>> parallel port to create 16 output and 16 input lines.  I use these lines
> >>> for higher-latency signals, since it takes about 1 ms to shift all the
> >> bits
> >>> in and out.
> >>>
> >>> There is a good article explaining it here:
> >>>
> >>>
> >> http://robots.freehostia.com/Software/ShiftRegister/ShiftRegisterBody.html
> >>> -Kip
> >>>
> >>>
> >>> On Fri, Dec 28, 2012 at 5:15 AM, MC Cason 
> >> wrote:
>  On 12/28/2012 03:10 AM, Steve Blackmore wrote:
> > On Fri, 28 Dec 2012 02:34:37 -0500, you wrote:
> >
> >
> >> Mainly the 3 weeks to a month it takes from mainland china for
> >> delivery.
> >> But since I've decided to sacrifice the one pin I was saving for a
> >> home
> >> pin, that is the path I'll take.
> > That seems a long time? I've had several packages from China most have
> > taken 4 or 5 days, none longer than 10 days from Shanghai to my
> >> doorstep
> > in UK. They are usually in the country within 48 hours, the delays are
> > always here!
> >
> > Steve Blackmore
> > --
>   Here in the Southern part of the US,  It regularly takes between 10
>  days, and 2 weeks for items to arrive from Shenzhen, or Hong Kong,
>  Longer, from Shanghai, or Guandong.  The latest set of boards I had
>  made, were air flighted out of Hong Kong, on the 19th. According to the
>  tracking number, they haven't landed yet...
> 
>  --
>  MC Cason - Assocaite Developer - Eagle3D
>  Created by: Matthias Weißer
> 
> 
> 
> 
> 
> >> --
>  Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and
>  much more. Get web development skills now with LearnDevNow -
>  350+ hours of step-by-step video tutorials by Microsoft MVPs and
> >> experts.
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>  https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> >> --
> >> Regards / Groete
> >>
> >> Marius D. Liebenberg
> >> MasterCut cc
> >> Cel: +27 82 698 3251
> >> Tel: +27 12 743 6064
> >> Fax: +27 86 551 8029
> >> Skype: marius_d.liebenberg
> >> Skype Me^(TM)! 
> >> Get Skype  and call me for free.
> >>
> >>

Re: [Emc-users] Servo tuning MESA 7i48 cards

[Peter C. Wallace]

On Sun, 27 Jan 2013, Jon Elson wrote:

> Date: Sun, 27 Jan 2013 11:59:22 -0600
> From: Jon Elson 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Servo tuning MESA 7i48 cards
> 
> Anders Wallin wrote:
>> The servo is a current drive with a +- 10 volt input.
>>
>  ^
>>> As there is not much load on the drive so a +-0.4 volt will swing the motor
>>> at full speed.
>>>
>>>
>>
>> Tuning with no load at all might be hard or impossible. Do you have the
>> motors attached to the ballscrew/machine?
>> Full speed at 0.4V command would mean you throw away a factor 20 of dynamic
>> range.
>> I'd suggest you do something to get full speed at closer to 8 or 9 V
>> command - maybe lower the supply voltage to the drives, adjust the max
>> current, or something.
>>
> No, he says he's running in torque mode, so this is probably right, for
> that setup.
> I'd suggest adding a tach and going to velocity mode, but if that is
> hard, then you
> have to tune it for torque mode.  You might contact Igor Chudov, who is
> using
> Copley amps in torque mode with my (Pico Systems) analog interface.  He
> may have some suggestions.
>
> Jon
>
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>
If the drives are indeed in torque mode (which is hard to reconcile with 
tuning the drives step response via a potentiometer), It may be very hard to 
tune a bare unloaded motor at a linuxCNC 1 KHz sample rate (~300 hz bandwidth)

Peter Wallace
Mesa Electronics

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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Marshland Engineering]

Can you tell me what your PID values you have in your setup? I know mine 
won't bet the same but it gives me an idea on the range.

Thanks Wallace 


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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Jon Elson]

Anders Wallin wrote:
> The servo is a current drive with a +- 10 volt input.
>   
  ^
>> As there is not much load on the drive so a +-0.4 volt will swing the motor
>> at full speed.
>>
>> 
>
> Tuning with no load at all might be hard or impossible. Do you have the
> motors attached to the ballscrew/machine?
> Full speed at 0.4V command would mean you throw away a factor 20 of dynamic
> range.
> I'd suggest you do something to get full speed at closer to 8 or 9 V
> command - maybe lower the supply voltage to the drives, adjust the max
> current, or something.
>   
No, he says he's running in torque mode, so this is probably right, for 
that setup.
I'd suggest adding a tach and going to velocity mode, but if that is 
hard, then you
have to tune it for torque mode.  You might contact Igor Chudov, who is 
using
Copley amps in torque mode with my (Pico Systems) analog interface.  He
may have some suggestions.

Jon

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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Peter C. Wallace]

On Sun, 27 Jan 2013, Marshland Engineering wrote:

> Date: Sun, 27 Jan 2013 22:24:03 +1300
> From: Marshland Engineering 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Servo tuning MESA 7i48 cards
> 
> I'm running Colpey servo drives but I cannot get them tuned in with
> LinuxCNC.
>
> The servo is a current drive with a +- 10 volt input.
> As there is not much load on the drive so a +-0.4 volt will swing the motor
> at full speed.

This sounds like torque mode
>
> The manual for the drive says to supply a stepped input to it and tune the
> feedback pot till the motor steps nicely without overshoot. Done this with a
> 1 HZ signal generator.

This is really hard to understand if the drive is really in torque mode.
This behaviour sounds a little like a velocity mode servo that has no 
tachometer feedback

That is, in torque mode, all the you can step is the motor current (and torque 
is proportional to motor current) so unless you are plotting acceleration, 
linuxCNC will not see anything like a step.

With steps in acceleration you should see a roughly parabolic 
position, and a linearly increasing velocity.

  >
> Now when I'm runing it with LinucCNC, I get a lot of overshoot and
> eventually, if the step is big enougth, a following error.

A couple of things: If you have any significant I term, a step input will 
cause 'integral windup' and overshoot. For this reason once you close the 
loop in LinuxCNC you should not make step movements (or leave I at 0 until
basic tuning is OK)

>
> I've tried P, I and D  values varying from .05 to 5 and output voltages from
> 1-10 and none seem to make any real improvement.
>
> I'm stuck.
>
> Thanks Wallace
>
>
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Peter Wallace
Mesa Electronics

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Re: [Emc-users] OT - liquid pump for really cold temperature

[Dave]

On 1/19/2013 4:22 PM, Viesturs Lācis wrote:
> Hello!
>
> Winter has arrived with temperatures below -20C, so I finally decided
> to something about inability to start up car's engine in these cold
> mornings.
> There are lots of options for auxiliary heating with fuel and
> electricity. I found on ebay a nice heater that works from fuel, but
> it costs some 600 EUR.
> I found out that my parents have installed some electrical heaters in
> several of our tractors. They are cheap (something around 70 EUR) and
> work good, but the problem is that there is no pump inside the unit,
> just heater. In tractors they are specially placed relatively low to
> the engine so that the cooling liquid flows naturally as it is heated.
> I do not think that it is possible in car, so the question is:
> Can anyone suggest a small pump, powered by AC electricity and, what
> is most important, that will work in -20C, -30C temperature? I was
> thinking about all these aquarium pumps - size is great, flow rate
> also good, but I am reserved about them working below 0C.
>
> Is there something for a reasonable price?
> Thanks in advance!
>
>
Viesturs,

I have a couple of diesel powered trucks. Most of them have the plug 
style block heaters that screw into the engine block to
keep it warm. Those work well.

I also have a semi tractor and installing a screw in block style heater 
was near impossible due to the frame around the engine.

So I installed one of these:

http://www.amazon.com/Kats-13150-Aluminum-Circulating-Heater/dp/B000BQUUR6/ref=sr_1_3?ie=UTF8&qid=1359301989&sr=8-3&keywords=engine+heater

It works really well heating up a 855 cu in / 14 liter diesel engine 
block. I have the heater mounted about in the vertical center of the 
block and it somehow "pumps" the coolant around, it is not just convection.
You can here the coolant flow, it may be a steam expansion cycle of 
something. I'm not sure, but it works very well.

I don't know if you can get full access to Amazon.com from your 
country.. if not try a proxy server here in the US to get "local" access 
and then
do a search on "engine heater". My search returned over 2000 results! 
They have every sort of engine heater imaginable listed.

Dave

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Re: [Emc-users] Servo tuning MESA 7i48 cards

[TJoseph Powderly]

On 01/27/2013 03:24 AM, Marshland Engineering wrote:
> I'm running Colpey servo drives but I cannot get them tuned in with
> LinuxCNC.
>
> The servo is a current drive with a +- 10 volt input.
> As there is not much load on the drive so a +-0.4 volt will swing the motor
> at full speed.
>
> The manual for the drive says to supply a stepped input to it and tune the
> feedback pot till the motor steps nicely without overshoot. Done this with a
> 1 HZ signal generator.
>
> Now when I'm runing it with LinucCNC, I get a lot of overshoot and
> eventually, if the step is big enougth, a following error.
>
> I've tried P, I and D  values varying from .05 to 5 and output voltages from
> 1-10 and none seem to make any real improvement.
>
> I'm stuck.
>
> Thanks Wallace
>
>
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I use Copley 423's a lot. Tune the copley with expected load and no 
linuxcnc 1st. Use maximum
command voltages of 8 to 9 Volts ( allows headroom for correction needed 
when at max cmd Vltg.)
The Copley manuals tell how. Basicly use a 'battery box' like 2 pcs 9V 
batteries with a pot and a switch.
Use that as the command voltage source (+/- 0 to 9V). Test with expected 
load. After it gets stable, inject the maximum ( 8 to 9V) cmd using the 
preset pot and the switch. This is the 'step test' ( immediate reaction 
to max cmd. Measure how long it takes your system, under load, to get to 
max velocity). Have the scope on the tachometer. How long it takes to 
get to the max tacho value is the accleration potential of your system. 
The sharpness of the corners of the ramp are how well you have it under 
control ( 'stiffness'). Go for a bit of undershoot on those corners 
rather than overshoot, or at most oscillation.
The Copley manual really do tell how to do this step by step. AFTER you 
get the amp ready, THEN let linuxcnc send the command voltages. You will 
not get the acceleration you achieved in your 'open loop' tests, expect 
at most 80%. This testing is neccesary and has to be done under expected 
loads. So clamp stuff onto moving joints (clamp well too, cuz this is 
the time when runaways occur at first.
hth tomp

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[Emc-users] backplot setup

[Tomaz T .]

I have a little problem to setup correctly backplot preview, which is shown 
offsetted for a certain distance from gcode preview (only by X axis). I assume 
I messed up something in DISPLAY section or this could be also somehow related 
to 5axis kinematics that I use.My machine is 5axis (bridge construction), which 
has X, Y, Z, B (around Y and U) , C (around Z) , U (parallel with Y).

  
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Re: [Emc-users] Servo tuning MESA 7i48 cards

[Anders Wallin]

The servo is a current drive with a +- 10 volt input.
> As there is not much load on the drive so a +-0.4 volt will swing the motor
> at full speed.
>

Tuning with no load at all might be hard or impossible. Do you have the
motors attached to the ballscrew/machine?
Full speed at 0.4V command would mean you throw away a factor 20 of dynamic
range.
I'd suggest you do something to get full speed at closer to 8 or 9 V
command - maybe lower the supply voltage to the drives, adjust the max
current, or something.

It sounds like you have two loops: one in the drive and one using linuxcnc.
It's hard to say what is going wrong without knowing more about the system.
What loop is the drive closing? with what feedback? What loop is linuxcnc
closing?

AW
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[Emc-users] Servo tuning MESA 7i48 cards

[Marshland Engineering]

I'm running Colpey servo drives but I cannot get them tuned in with 
LinuxCNC.

The servo is a current drive with a +- 10 volt input.
As there is not much load on the drive so a +-0.4 volt will swing the motor 
at full speed.

The manual for the drive says to supply a stepped input to it and tune the 
feedback pot till the motor steps nicely without overshoot. Done this with a 
1 HZ signal generator.

Now when I'm runing it with LinucCNC, I get a lot of overshoot and 
eventually, if the step is big enougth, a following error.

I've tried P, I and D  values varying from .05 to 5 and output voltages from 
1-10 and none seem to make any real improvement.

I'm stuck.

Thanks Wallace 


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