Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Sunday 27 May 2018 10:06:10 Gene Heskett wrote:

> On Sunday 27 May 2018 09:02:21 Ken Strauss wrote:
> > Paypal is an option.
>
> According to their web site last night, paypal is not accepted.
 Using "collet black" as a search term on fleabay did get some hits from 
NA places.  But I've come to the conclusion that a gear drive hose clamp 
on the nose of the R8, and the tables tailstock on the far end of the 
workpiece is still subject to too much slippage opportunities.

So I am going to round up a block big enough to cut a half circle that 
just fits the relaxed size of the r8 collet at the bottom of the skirt, 
and clamp that to the table under the end of the r8. That, combined with 
the tail stock should prevent it canting when the pressure of the drill 
hits it. I was cutting a flat on the side so the drill didn't walk, but 
found a better idea, bring the drill to within a half a mm, then go down 
at 2mm/minute and the drill doesn't walk while making its starter 
dimple, then send it on down to intersect the central tap shank bore at 
about 40mm/min. But that seems to harden the brass at the point of 
contact, and the force of speeding up the drill pushes the workpiece 
canted lengthwise. Back off and then come back down and it seems to cut 
thru the hard layer and keep going. Fix my code to make that move, and 
make a follower to brace the bottom of the r8, which is sticking out of 
the chuck around 4" and has no clamp on the workpiece other than its 
friction fit. Or, better yet, size the follower to fit the bottom of the 
workpiece and put it directly under the drills path.  Yeah, I like that 
even better. I've still got about 40 left to do.

Now if I could get one of the neighbors kids to cut my grass, its a 
jungle, and in the middle 80's here.

-- 
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] rotary tables, was Home switches.

[Gene Heskett]

On Sunday 27 May 2018 09:02:21 Ken Strauss wrote:

> Paypal is an option.
>
According to their web site last night, paypal is not accepted.


-- 
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] rotary tables, was Home switches.

[Ken Strauss]

Paypal is an option.

> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Saturday, May 26, 2018 11:22 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] rotary tables, was Home switches.
>
> On Saturday 26 May 2018 19:35:20 Ken Strauss wrote:
>
> > I haven't found a North American supplier but shipping by ArcEuro only
> > takes a few days. I recently got an ER40 square/hex pair from them. At
> > current exchange rates 1 UKP is about us$1.14. Note, VAT does not
> > apply to shipments to outside the EU so assume 1 pound = 1 dollar.
> >
> And this is upsetting me, my bank declined the off shore charge.
> They've been known to use more stringent anti-fraud measures outside of
> normal business hours or on a long holiday before. So I sit and simmer
> till Tuesday I guess. They don't get it that I'm retired & have been
> since the middle of 2002. I don't often wear a watch, or pay attention
> to what day of the week it is.
>
> > > -Original Message-
> > > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > > Sent: Saturday, May 26, 2018 7:05 PM
> > > To: emc-users@lists.sourceforge.net
> > > Subject: Re: [Emc-users] rotary tables, was Home switches.
> > >
> > > On Saturday 26 May 2018 18:58:32 Gene Heskett wrote:
> > > > On Saturday 26 May 2018 18:20:14 andy pugh wrote:
> > > > > On 25 May 2018 at 17:47, Gene Heskett 
> wrote:
> > > > > > Its a piece of India made 4" junk.
> > > > > > Handy for facing bolt head flats,
> > > > >
> > > > > I tend to use these for that:
> > > > > http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtur
> > > > >es/E R3 2-Collet-Blocks
> > > >
> > > > I have wished for something like that, but thats the first I've
> > > > actually seen such a critter. Next time it comes up, I'll see if
> > > > they ship to the middle of the US.
> > > >
> > > > > Much quicker to set up. Just hold the bolt in a collet and hold
> > > > > the block in the machine vice.
> > > > > The square one would work well for drilling grub-screw holes in
> > > > > tap hats.
> > > >
> > > > That it would, but I've got a lashup that works most of the time
> > > > now.
> > > >
> > > > I didn't see a price, can you venture a SWAG?
> > >
> > > Its there in pounds or euro's if I scroll down far enough. Looks
> > > like the best deal, one of each and a nut for 33 something. Most
> > > brit stuff is quite reasonable.
> > >
> > > > > I don't know if there is a US supplier.
> > > >
> > > > 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 <http://geneslinuxbox.net:6309/gene>
> >
> > --
> >-- --
> >
> > > Check out the vibrant tech community on one of the world's most
> > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > --
> > Check out the vibrant tech community on one of the world's
> > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > ___
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> > 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 <http://geneslinuxbox.net:6309/gene>
>
>

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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Saturday 26 May 2018 23:26:14 Jon Elson wrote:

> On 05/26/2018 10:21 PM, Gene Heskett wrote:
> > On Saturday 26 May 2018 19:35:20 Ken Strauss wrote:
> >> I haven't found a North American supplier but shipping by ArcEuro
> >> only takes a few days. I recently got an ER40 square/hex pair from
> >> them. At current exchange rates 1 UKP is about us$1.14. Note, VAT
> >> does not apply to shipments to outside the EU so assume 1 pound = 1
> >> dollar.
> >
> > And this is upsetting me, my bank declined the off shore charge.
> > They've been known to use more stringent anti-fraud measures outside
> > of normal business hours or on a long holiday before. So I sit and
> > simmer till Tuesday I guess. They don't get it that I'm retired &
> > have been since the middle of 2002. I don't often wear a watch, or
> > pay attention to what day of the week it is.
>
> They may have a 24-hour fraud line that you can contact to
> OK the charge.
>
> Jon
>
They sent me an email already, scored 9.9 by spamassassin, most from 
poor, non-rfc compliant tramsmission errors. I called the number 
supplied and went thru a complex thing to verify it was me, and to 
confirm that the charge would be accepted the next time it was 
presented.

We'll see, but its about the witching hour here. I feel a nap coming 
on...

Thanks Jon.

-- 
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] rotary tables, was Home switches.

[Jon Elson]

On 05/26/2018 10:21 PM, Gene Heskett wrote:

On Saturday 26 May 2018 19:35:20 Ken Strauss wrote:


I haven't found a North American supplier but shipping by ArcEuro only
takes a few days. I recently got an ER40 square/hex pair from them. At
current exchange rates 1 UKP is about us$1.14. Note, VAT does not
apply to shipments to outside the EU so assume 1 pound = 1 dollar.


And this is upsetting me, my bank declined the off shore charge.
They've been known to use more stringent anti-fraud measures outside of
normal business hours or on a long holiday before. So I sit and simmer
till Tuesday I guess. They don't get it that I'm retired & have been
since the middle of 2002. I don't often wear a watch, or pay attention
to what day of the week it is.


They may have a 24-hour fraud line that you can contact to 
OK the charge.


Jon

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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Saturday 26 May 2018 19:35:20 Ken Strauss wrote:

> I haven't found a North American supplier but shipping by ArcEuro only
> takes a few days. I recently got an ER40 square/hex pair from them. At
> current exchange rates 1 UKP is about us$1.14. Note, VAT does not
> apply to shipments to outside the EU so assume 1 pound = 1 dollar.
>
And this is upsetting me, my bank declined the off shore charge.
They've been known to use more stringent anti-fraud measures outside of 
normal business hours or on a long holiday before. So I sit and simmer 
till Tuesday I guess. They don't get it that I'm retired & have been 
since the middle of 2002. I don't often wear a watch, or pay attention 
to what day of the week it is.

> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > Sent: Saturday, May 26, 2018 7:05 PM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] rotary tables, was Home switches.
> >
> > On Saturday 26 May 2018 18:58:32 Gene Heskett wrote:
> > > On Saturday 26 May 2018 18:20:14 andy pugh wrote:
> > > > On 25 May 2018 at 17:47, Gene Heskett  
wrote:
> > > > > Its a piece of India made 4" junk.
> > > > > Handy for facing bolt head flats,
> > > >
> > > > I tend to use these for that:
> > > > http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtur
> > > >es/E R3 2-Collet-Blocks
> > >
> > > I have wished for something like that, but thats the first I've
> > > actually seen such a critter. Next time it comes up, I'll see if
> > > they ship to the middle of the US.
> > >
> > > > Much quicker to set up. Just hold the bolt in a collet and hold
> > > > the block in the machine vice.
> > > > The square one would work well for drilling grub-screw holes in
> > > > tap hats.
> > >
> > > That it would, but I've got a lashup that works most of the time
> > > now.
> > >
> > > I didn't see a price, can you venture a SWAG?
> >
> > Its there in pounds or euro's if I scroll down far enough. Looks
> > like the best deal, one of each and a nut for 33 something. Most
> > brit stuff is quite reasonable.
> >
> > > > I don't know if there is a US supplier.
> > >
> > > 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 <http://geneslinuxbox.net:6309/gene>
>
> --
>-- --
>
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> --
> Check out the vibrant tech community on one of the world's
> most engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
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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 <http://geneslinuxbox.net:6309/gene>

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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Saturday 26 May 2018 19:35:20 Ken Strauss wrote:

> I haven't found a North American supplier but shipping by ArcEuro only
> takes a few days. I recently got an ER40 square/hex pair from them. At
> current exchange rates 1 UKP is about us$1.14. Note, VAT does not
> apply to shipments to outside the EU so assume 1 pound = 1 dollar.
>
And at the diameter of these, 7/8", it will take an ER40. I have the rest 
of that kit already.

Thanks Ken.

-- 
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] rotary tables, was Home switches.

[Ken Strauss]

I haven't found a North American supplier but shipping by ArcEuro only takes
a few days. I recently got an ER40 square/hex pair from them. At current
exchange rates 1 UKP is about us$1.14. Note, VAT does not apply to shipments
to outside the EU so assume 1 pound = 1 dollar.

> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Saturday, May 26, 2018 7:05 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] rotary tables, was Home switches.
>
> On Saturday 26 May 2018 18:58:32 Gene Heskett wrote:
>
> > On Saturday 26 May 2018 18:20:14 andy pugh wrote:
> > > On 25 May 2018 at 17:47, Gene Heskett  wrote:
> > > > Its a piece of India made 4" junk.
> > > > Handy for facing bolt head flats,
> > >
> > > I tend to use these for that:
> > > http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/E
> > >R3 2-Collet-Blocks
> >
> > I have wished for something like that, but thats the first I've
> > actually seen such a critter. Next time it comes up, I'll see if they
> > ship to the middle of the US.
> >
> > > Much quicker to set up. Just hold the bolt in a collet and hold the
> > > block in the machine vice.
> > > The square one would work well for drilling grub-screw holes in tap
> > > hats.
> >
> > That it would, but I've got a lashup that works most of the time now.
> >
> > I didn't see a price, can you venture a SWAG?
>
> Its there in pounds or euro's if I scroll down far enough. Looks like the
> best deal, one of each and a nut for 33 something. Most brit stuff is
> quite reasonable.
>  >
> > > I don't know if there is a US supplier.
> >
> > 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 <http://geneslinuxbox.net:6309/gene>
>
>

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> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Saturday 26 May 2018 18:58:32 Gene Heskett wrote:

> On Saturday 26 May 2018 18:20:14 andy pugh wrote:
> > On 25 May 2018 at 17:47, Gene Heskett  wrote:
> > > Its a piece of India made 4" junk.
> > > Handy for facing bolt head flats,
> >
> > I tend to use these for that:
> > http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/E
> >R3 2-Collet-Blocks
>
> I have wished for something like that, but thats the first I've
> actually seen such a critter. Next time it comes up, I'll see if they
> ship to the middle of the US.
>
> > Much quicker to set up. Just hold the bolt in a collet and hold the
> > block in the machine vice.
> > The square one would work well for drilling grub-screw holes in tap
> > hats.
>
> That it would, but I've got a lashup that works most of the time now.
>
> I didn't see a price, can you venture a SWAG?

Its there in pounds or euro's if I scroll down far enough. Looks like the 
best deal, one of each and a nut for 33 something. Most brit stuff is 
quite reasonable.
 >
> > I don't know if there is a US supplier.
>
> 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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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Saturday 26 May 2018 18:20:14 andy pugh wrote:

> On 25 May 2018 at 17:47, Gene Heskett  wrote:
> > Its a piece of India made 4" junk.
> > Handy for facing bolt head flats,
>
> I tend to use these for that:
> http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/ER3
>2-Collet-Blocks
>
I have wished for something like that, but thats the first I've actually 
seen such a critter. Next time it comes up, I'll see if they ship to the 
middle of the US.

> Much quicker to set up. Just hold the bolt in a collet and hold the
> block in the machine vice.
> The square one would work well for drilling grub-screw holes in tap
> hats.

That it would, but I've got a lashup that works most of the time now.

I didn't see a price, can you venture a SWAG?

>
> I don't know if there is a US supplier.

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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Re: [Emc-users] rotary tables, was Home switches.

[andy pugh]

On 25 May 2018 at 17:47, Gene Heskett  wrote:

> Its a piece of India made 4" junk.
> Handy for facing bolt head flats,

I tend to use these for that:
http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/ER32-Collet-Blocks

Much quicker to set up. Just hold the bolt in a collet and hold the
block in the machine vice.
The square one would work well for drilling grub-screw holes in tap hats.

I don't know if there is a US supplier.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] rotary tables, was Home switches.

[jeremy youngs]

On Fri, May 25, 2018, 15:31 John Dammeyer  wrote:

>
> So would I suggest it as a usable drive?  Yes.  Is it possible to get one
> with that output current?  Not sure the driver chip was discontinued and I
> know they are working on a Rev 2 but I don't know when that will happen.
>
> John
>
>
> Thank you for the assessment john
>
> > -Original Message-
> > From: jeremy youngs [mailto:jcyoung...@gmail.com]
> > Sent: May-25-18 11:05 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] rotary tables, was Home switches.
> >
> > On Fri, May 25, 2018, 12:16 John Dammeyer 
> > wrote:
> >
> > >  I'm also fortunate enough to
> > > have a Harmonic Drive like the one Andy has along with the STMBL
> drive..
> > >
> >
> > How do you like the stmbl? And what was your build cost ? If I get this
> six
> > horse bldc for my spindle I need 37 amps peak at 230 , I understand
> that's
> > feasible with this drive , my level of electronics skill I am certain
> will
> > be taxed at best .
> >
> > >
> > >
> >
>
> 
> --
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
>
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Re: [Emc-users] rotary tables, was Home switches.

[John Dammeyer]

I was one of the early assemblers of the kits that Andy sent out.  Since I'm
using step/dir for it there were some firmware bug updates happening and one
really great upgrade that makes it easier in the long run to update firmware
on both boards.   

The STMBL is not targeted with step/dir as the primary control so the
interface is RS485 for each of the step,dir and enable signals.  I had to
breadboard up a small level translation module to deal with that.
Apparently it's possible to use one of the other headers with I believe 3.3V
logic but I really didn't like that idea.  I would have preferred optical
isolated inputs.

But otherwise,  the motor behaved as expected using my ELS as a step/dir
generator.  Even with the little grumbles I can honestly say I really like
the STMBL.  And the support from Rene's group and from Andy has been
terrific.

So would I suggest it as a usable drive?  Yes.  Is it possible to get one
with that output current?  Not sure the driver chip was discontinued and I
know they are working on a Rev 2 but I don't know when that will happen.

John


> -Original Message-
> From: jeremy youngs [mailto:jcyoung...@gmail.com]
> Sent: May-25-18 11:05 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] rotary tables, was Home switches.
> 
> On Fri, May 25, 2018, 12:16 John Dammeyer 
> wrote:
> 
> >  I'm also fortunate enough to
> > have a Harmonic Drive like the one Andy has along with the STMBL drive..
> >
> 
> How do you like the stmbl? And what was your build cost ? If I get this
six
> horse bldc for my spindle I need 37 amps peak at 230 , I understand that's
> feasible with this drive , my level of electronics skill I am certain will
> be taxed at best .
> 
> >
> >
>

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Re: [Emc-users] rotary tables, was Home switches.

[jeremy youngs]

On Fri, May 25, 2018, 12:16 John Dammeyer  wrote:

>  I'm also fortunate enough to
> have a Harmonic Drive like the one Andy has along with the STMBL drive..
>

How do you like the stmbl? And what was your build cost ? If I get this six
horse bldc for my spindle I need 37 amps peak at 230 , I understand that's
feasible with this drive , my level of electronics skill I am certain will
be taxed at best .

>
>
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Re: [Emc-users] rotary tables, was Home switches.

[Ken Strauss]

For a nicely done rotary table/stepper configuration see
http://www.mandalaroseworks.com/product/stepper_relocation

The Phase-II rotary table (6-inch) is not bad quality and was occasionally
on sale at Enco. No idea where to get one cheap now.

I would love a low-profile tilting table for use with my 6-inch 4th axis.
Any thoughts on the, currently out of stock, Grizzly T10221? Suggestions for
a cheaper and available alternative?

> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Friday, May 25, 2018 12:48 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] rotary tables, was Home switches.
>
> On Friday 25 May 2018 08:41:42 TERRY Christophersen wrote:
>
> > Table toward you and to the left is machine home.
> > 4th axis on the right hand side of the table.
> > This is how most machines are.
> >
> Which direction/angle is the motor sticking out? Any direct drive to the
> drive worm is an un-handy direction, so in order to clear stuff, my
> little table has to be on the left, so the drive motor projects at a 45
> degree angle up and to the front.  Its a piece of India made 4" junk.
> Handy for facing bolt head flats, or for drilling and tapping for the
> grub screws for these tap hats I am making 2 or 3 a day, but useless for
> cutting sprockets or gears. Backlash is measured in degrees, and varies
> because the bull gear is off center.
>
> I needed a special drill while installing the safety railing for the
> wheelchair ramp, so I made a 3 fluter I had to re-sharpen several times
> with it, but since the cutting forces were into it axially, I had to put
> the air hose rigged to pressurize the internals, exerting a lifting
> force to the table so a 270 oz/in nema 23 could turn it to do the
> spiral.
>
> If I could find a 5" that was really precise, and whose worm shaft was
> horizontal and high enough to leave room for the motor to clear the
> table, I likely would have laid the card on the counter years ago. Those
> 5" all angle tilting head things look good, until I ask myself can the
> motor turn it under cutting loads, You can using the indexing plates,
> lock it in any position, but can they move while a 1/4" round nose is
> carving the workpiece?
>
> My mental SWAG says no.
>
> So an almost too big for a G0704 6" table, with the motor on a swing
> mount so it can belt drive the worm with a 3/1 multiplier, while the
> motor mount can be turned to place a nema 34 to its left, bottom side
> when mounted vertical, or rotated so its beside the table when mounted
> face up. But thats going to be 40+ lbs for this old fart to handle, I've
> not ever seen one so rigged, but I can sure "make it so."  That is what
> we do here I think.
>
> I've got to, this one is an excedrin headache, and a fairly low numbered
> one at that. So who makes the best 6" for raw material? Preferably NOT
> made in India.
>
> [...]
>
> --
> 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 <http://geneslinuxbox.net:6309/gene>
>
>

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> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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> https://lists.sourceforge.net/lists/listinfo/emc-users



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Re: [Emc-users] rotary tables, was Home switches.

[John Dammeyer]

Although I have a tiny 4" table with a stepper, I'm also fortunate enough to
have a Harmonic Drive like the one Andy has along with the STMBL drive..
When I finally get around to casting the holder it will be tall enough to
hold a 10" face plate but no wider than the mill table.

I am eventually planning on a tool changer since I have a number of TT
holders but I don't expect it to be in the way for homing.
John


> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: May-25-18 9:48 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] rotary tables, was Home switches.
> 
> On Friday 25 May 2018 08:41:42 TERRY Christophersen wrote:
> 
> > Table toward you and to the left is machine home.
> > 4th axis on the right hand side of the table.
> > This is how most machines are.
> >
> Which direction/angle is the motor sticking out? Any direct drive to the
> drive worm is an un-handy direction, so in order to clear stuff, my
> little table has to be on the left, so the drive motor projects at a 45
> degree angle up and to the front.  Its a piece of India made 4" junk.
> Handy for facing bolt head flats, or for drilling and tapping for the
> grub screws for these tap hats I am making 2 or 3 a day, but useless for
> cutting sprockets or gears. Backlash is measured in degrees, and varies
> because the bull gear is off center.
> 
> I needed a special drill while installing the safety railing for the
> wheelchair ramp, so I made a 3 fluter I had to re-sharpen several times
> with it, but since the cutting forces were into it axially, I had to put
> the air hose rigged to pressurize the internals, exerting a lifting
> force to the table so a 270 oz/in nema 23 could turn it to do the
> spiral.
> 
> If I could find a 5" that was really precise, and whose worm shaft was
> horizontal and high enough to leave room for the motor to clear the
> table, I likely would have laid the card on the counter years ago. Those
> 5" all angle tilting head things look good, until I ask myself can the
> motor turn it under cutting loads, You can using the indexing plates,
> lock it in any position, but can they move while a 1/4" round nose is
> carving the workpiece?
> 
> My mental SWAG says no.
> 
> So an almost too big for a G0704 6" table, with the motor on a swing
> mount so it can belt drive the worm with a 3/1 multiplier, while the
> motor mount can be turned to place a nema 34 to its left, bottom side
> when mounted vertical, or rotated so its beside the table when mounted
> face up. But thats going to be 40+ lbs for this old fart to handle, I've
> not ever seen one so rigged, but I can sure "make it so."  That is what
> we do here I think.
> 
> I've got to, this one is an excedrin headache, and a fairly low numbered
> one at that. So who makes the best 6" for raw material? Preferably NOT
> made in India.
> 
> [...]
> 
> --
> 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 <http://geneslinuxbox.net:6309/gene>
> 
>

--
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> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
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> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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Re: [Emc-users] rotary tables, was Home switches.

[Gene Heskett]

On Friday 25 May 2018 08:41:42 TERRY Christophersen wrote:

> Table toward you and to the left is machine home.
> 4th axis on the right hand side of the table.
> This is how most machines are.
>
Which direction/angle is the motor sticking out? Any direct drive to the 
drive worm is an un-handy direction, so in order to clear stuff, my 
little table has to be on the left, so the drive motor projects at a 45 
degree angle up and to the front.  Its a piece of India made 4" junk. 
Handy for facing bolt head flats, or for drilling and tapping for the 
grub screws for these tap hats I am making 2 or 3 a day, but useless for 
cutting sprockets or gears. Backlash is measured in degrees, and varies 
because the bull gear is off center.

I needed a special drill while installing the safety railing for the 
wheelchair ramp, so I made a 3 fluter I had to re-sharpen several times 
with it, but since the cutting forces were into it axially, I had to put 
the air hose rigged to pressurize the internals, exerting a lifting 
force to the table so a 270 oz/in nema 23 could turn it to do the 
spiral.

If I could find a 5" that was really precise, and whose worm shaft was 
horizontal and high enough to leave room for the motor to clear the 
table, I likely would have laid the card on the counter years ago. Those 
5" all angle tilting head things look good, until I ask myself can the 
motor turn it under cutting loads, You can using the indexing plates, 
lock it in any position, but can they move while a 1/4" round nose is 
carving the workpiece?

My mental SWAG says no.

So an almost too big for a G0704 6" table, with the motor on a swing 
mount so it can belt drive the worm with a 3/1 multiplier, while the 
motor mount can be turned to place a nema 34 to its left, bottom side 
when mounted vertical, or rotated so its beside the table when mounted 
face up. But thats going to be 40+ lbs for this old fart to handle, I've 
not ever seen one so rigged, but I can sure "make it so."  That is what 
we do here I think.

I've got to, this one is an excedrin headache, and a fairly low numbered 
one at that. So who makes the best 6" for raw material? Preferably NOT 
made in India.

[...]

-- 
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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