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Subj: Re: [CAD_CAM_EDM_DRO] Houston HMSC
Date: 27-February-00 19:45:57 Central Standard Time
From: JanRwl@...
Reply-to: CAD_CAM_EDM_DRO@...
To: CAD_CAM_EDM_DRO@...

From: JanRwl@...

In a message dated 27-February-00 16:36:57 Central Standard Time,
ward@... writes:

<< I wasn't trying to upset you...

Sorry, >>
Na! You didn't! All is cool! Thanks.

As previously mentioned, I would try to get a web site up this weekend......

Yep, it up; but it doesn't work quite properly with the various buttons for
some of the pages (yet); so here is the direct link to the DRO portion:


Hope it can help somebody.

Later,

Art

OLDER THAN DIRT

Country Bubba

(Actually the inventor of Country and Bubba)

I have a Shasuka (sp?) vertical mill with an old Summit-Bandit controller.
Needless to say, it is costing me a fortune to keep it working! This
particular
mill has servo motors and resolver position sensors. The Servo board is
working
OK, but something else is messed up

Check out

They make a Bandit retrofit controller. They also have a Shizouka retrofit
listed for sale on their web site.
I'm not sure of the cost, but if all they have to do is install the new
control & tune it, you may get by inexpensively. They don't list prices on
the web site, if you call them let us know how they are. I have a
Bridgeport here with a Bandit & two extra control boxes for spare parts & I
have to decide soon if I want to make it work as is, or upgrade the
controller. I'm not convinced yet that the EMC is the way to go, & I know
that there are a couple of DOS options that will be easier for me to setup &
maintain. Also I would like to use the motors & resolvers in place, just
have electrical hookup & software tuning to get this machine into usable
condition.

Then there's that 8 inch rotary indexer sitting over in the corner......


Best Regards,

Fred Smith
IMService

The Free Threading Program is at

imserv@...
Phone: 248-486-3600 or 800-386-1670
Fax:248-486-3698

Well, I really did it this time! I have two Linux hard drives in my
system and can (formerly) boot three kernels. I downloaded the Feb. 25
version of EMC and moved it from one drive to the other. The foolish
thing I did (I think) was not umounting the drive after playing file
hockey between the drives. I did properly log out and shut down the
computer however, and that umounts the drives and all.

Anyway, I now have a BIG problem. I get a message that reads "You don't
exist! Go away!" when I attempt to boot rtlinux. My computer thinks its
name is "I don't have a name!". I also get a few other errors: 202
(extra stuff here) inode bit 6 already set. And 204 (extra jibberish
here) inode bit 6 already set. It also complains that it can't find a
extfs2 (sp on that?) file system and jabbers about a corrupted
superblock. That's the bad news... The good news is that I can mount and
access the whole drive from the other drive and everything is still
(apparently) still there.

Oh yea, The rtlinux kernel boots normally but when it gets to the place
where it asks for the user and password it fails.

Suggestions?

Clint Bach

These 2 companys listed below offer products that will
make your job more easy, if you got the bucks,




Steve

----------
From: PCSHAPER@...
To: CAD_CAM_EDM_DRO@...
Subject: [CAD_CAM_EDM_DRO] posting
Date: Saturday, February 26, 2000 11:05 PM

From: PCSHAPER@...

To anyone who cares to respond,

I have a Shasuka (sp?) vertical mill with an old Summit-Bandit controller.
Needless to say, it is costing me a fortune to keep it working! This
particular
mill has servo motors and resolver position sensors. The Servo board is
working
OK, but something else is messed up. I am trying to locate someone who
knows
an inexpensive PC based 3 axis servo control board that can work with
resolvers.
I also would like to know if anyone has a schematic of the resolver board
(2
boards
bolted together) and any programming information on this board. I am an
electronics
engineer and am interested in making an interface between the PC bus and
this
card
so that I can control the machine directly from a PC.

Anyone have any help ?

Barry W.


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In a message dated 27-February-00 15:53:53 Central Standard Time,
JanRwl@... writes:

<< From: JanRwl@...

In a message dated 27-February-00 15:35:47 Central Standard Time,
ward@... writes:

<< Where ?!?!
>>
Sorry! I had attempted to send a whole message, with this link:

<A href=">Home Metal Shop Club</A>

But something with the "link" (not!) happened, and my whole message did NOT
get sent, nor even "saved" on this end! I quickly loose patience with "new
sites" which make communication more difficult than turning on the
overhead-bedroom-light, so, in a word, "FORGET it!"

Jan Rowland >>

In a message dated 27-February-00 15:35:47 Central Standard Time,
ward@... writes:

<< Where ?!?!
>>
Sorry! I had attempted to send a whole message, with this link:

<A href=">Home Metal Shop Club</A>

But something with the "link" (not!) happened, and my whole message did NOT
get sent, nor even "saved" on this end! I quickly loose patience with "new
sites" which make communication more difficult than turning on the
overhead-bedroom-light, so, in a word, "FORGET it!"

Jan Rowland

The software didn't seem to agree with the rest of my message! I don't know,
now, if I can retrieve the whole thing, and send it! Duh... If you don't
hear from me right away, today, e-mail me again, with specific questions,
please! Jan Rowland

Yes you should buy a 39/64 collet, because one should never pass the opportunity to justify buying a new tool

For now you can wrap the screw with some .008 or .009 shim stock and get by with the 5/8 collet.
A single full wrap with a narrow seam gap will be a pain to load, but will do the job.


5C collets will spring quite a way, but the holding power and accuracy fall off fast past a couple of thousandths.

Charles Hopkins




Problem is the screw is .508" in diameter, too small for a 5/8"
collet. Given that it's a screw, I don't see any easy way to indicate
it in in a four jaw chuck, and my three jaw is ready for the scrap
heap. Looks like it's time to place an order for a 39/64" collet,
which would be .609375". What is the gripping range of a 5c collet
anyway? I'd try tape and the 5/8", but not sure how accurate the
results would be.

From: RCGipson <rcgipson@...>

hello everyone. i've been reading the discussion about nook ballscrews.
can someone send me more information as to what screws thay are using
and price/availability? are they available to the end user?

Look at www.nookindustries.com Prices are comparable to the Thomson
screw McMaster carries, but the Nook nuts have rounded corners that
worked better in my application. They will quote you prices over the
phone, and will sell direct to a business entity that wants to open an
account with them (standard credit reference and all). Otherwise ask
them to refer you to a distributor. The local motion industries
branch took my credit card, and had the parts shipped direclty to me
from Nook. There was a minimum order of a bit over a hundred dollars
which my pair of plain nuts and 2ft screw did not meet, so I spent the
extra for a factory made double-nut preloaded assembly. It makes sense
to figure out what you want and what it will cost on the phone with
Nook, then call up the distributor as they may well have to call up
Nook to get this info then get back to you.

i want to purchase some screws for a couple of machines i have and get
the idea that the nook screws can be easily machined.

Easily is a relative term - they are hardened steel just like the
Thomson and presumably all other rolled screws. Take light cuts on a
good lathe with carbide tooling until you get below the minor diameter
of the thread and everything should be fine. Do take a minute to
think about how you are going to hold them (the actual diameter of the
screw may not be anywhere on the datasheet) - either a collet of the
right size or a 3-jaw that you can true up on a test bar of the
same size would probably work.

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
30 Griswold Street, Cambridge, MA 02138

(617) 492-3358 home/shop

hello everyone. i've been reading the discussion about nook ballscrews.
can someone send me more information as to what screws thay are using
and price/availability? are they available to the end user?

i want to purchase some screws for a couple of machines i have and get
the idea that the nook screws can be easily machined.

thanks.

roger

stratton@... wrote:

From: stratton@...

I took a test cut on the Nook 5/8" ballscrew, and it machines
fairly well with carbide insert tooling.

Problem is the screw is .508" in diameter, too small for a 5/8"
collet. Given that it's a screw, I don't see any easy way to indicate
it in in a four jaw chuck, and my three jaw is ready for the scrap
heap. Looks like it's time to place an order for a 39/64" collet,
which would be .609375". What is the gripping range of a 5c collet
anyway? I'd try tape and the 5/8", but not sure how accurate the
results would be.

Chris,

You must mean 33/64 - that would be about 6 thousanths over and about the limit
for a 5C collet.

Split adapter sleeves were mentioned and that would work fine if you
don't have many to do. I had to use hardened slightly oversize collets
as the rolled screws usually have a burr on the land that rapidly
chews up soft steel. A soft emergency collet (bored to size in place)
was very accurate but did't last long.

I have noted that the land portion of the screw is usually not guaranteed
to be a datum. Best centering is done by using an indicator that
advances with the thread groove- the machine is just set up as if
you were going to thread that particular ballscrew pitch.

The casehardened surface can be machined (slowly) with cemented carbide
or inserts but I have found that rough grinding most of the case and lands off with
a hand angle grinder saves much time. There is less interrupted cutting
too.

A toolpost grinder helps but is not required. The few tenths accuracy
required for proper bearing fit (even ABEC-1) can be easily done
by honing the last thousanth or so.

A typical standard screw shaft end often uses a metric shaft diameter with
an imperial thread pitch- oh well.

A ballscrew FAQ is a good idea. I'm in!

Les

--
Leslie M.Watts
Illinois Tool Works
Corporate Advanced Technology group
(847) 657-4559

Hi Tim,

Thanks for the comments.

I have a working installation of EMC (except that it's playing up on the Feb
25th release) on a RH5.2 machine. This attempt to put it on a second RH6.1
machine is just so I can play around with it and perhaps get it running. I
had set up this machine so I can try out some of the newer linux apps and,
in any case, I wanted a second linux machine on my network to run some
multiscreen stuff. So, its not really so important that I get EMC up and
running on this one but now it has become a challenge......

Ian

--
Ian W. Wright
Sheffield UK

Hi Chris,

Why not machine a short collar, bored to a close sliding fit over the screw
and with a concentric outside - i.e all machined at one setting or. at
least, with the outside machined whilst the collar is held on a stub mandrel
which has been turned and left in situ. This will give you an accurate way
of setting the screw accurately and you can slide the collar anywhere along
the screw to test with the dial gauge.

Ian

--
Ian W. Wright
Sheffield UK

In a message dated 02/26/2000 2:35:59 PM Hawaiian Standard Time,
stratton@... writes:

<< What is the gripping range of a 5c collet
anyway? >>

I would not go ore than +-.005"
Peter
THRD, Inc.

In a message dated 02/26/2000 2:35:59 PM Hawaiian Standard Time,
stratton@... writes:

<< Problem is the screw is .508" in diameter, too small for a 5/8"
collet. Given that it's a screw, I don't see any easy way to indicate
it in in a four jaw chuck, and my three jaw is ready for the scrap
heap. Looks like it's time to place an order for a 39/64" collet,
which would be .609375". What is the gripping range of a 5c collet
anyway? I'd try tape and the 5/8", but not sure how accurate the
results would be. >>

Chris,
I took a 1.5" long length of 1" dia cold rolled steel and bored it out to
the correct diameter. Then I slit it length wise so it can be clamped. Insert
the ballscrew, grip the assembly in the 1" 5c collet in your spindle and turn
away.

Peter
THRD, Inc.

Hi,
Correct me if I'm wrong (remember, I'm trying to patch Stepster and learn
CNC at the same time!), but the ONLY G codes that are for scaling are G51,
G52 and G53? (well at least of the common ones)?

Charlie
-->
RKBA!
PGP Fingerprint: 7218 67D7 54B8 EFAF 67B7 4FED 7AC5 3687 492C 7382
PGP Key at

To anyone who cares to respond,

I have a Shasuka (sp?) vertical mill with an old Summit-Bandit controller.
Needless to say, it is costing me a fortune to keep it working! This
particular
mill has servo motors and resolver position sensors. The Servo board is
working
OK, but something else is messed up. I am trying to locate someone who knows
an inexpensive PC based 3 axis servo control board that can work with
resolvers.
I also would like to know if anyone has a schematic of the resolver board (2
boards
bolted together) and any programming information on this board. I am an
electronics
engineer and am interested in making an interface between the PC bus and this
card
so that I can control the machine directly from a PC.

Anyone have any help ?

Barry W.

Is the new EMC version for RH 5.2 only? I see there is a copy of an
older version in a 2.10 kernel directy for RH 6.1, but not the new
version.

the only thing that has limited EMC to RH5.2 is the version of
the NIST RCSLIB that has been included in the source package
its been compiled for kernel 2.0.36/RTLinux-9j (last I looked)
and a couple spots in the code that refrence RTLinux-9j instead of
a more generic RTL callout
the RCS source can be found at
ftp://isdftp.cme.nist.gov/pub/emc/rcslib/
newer RTL versions are at
ftp://ftp.fsmlabs.com/pub/rtlinux/
when I was instaling EMC on my Slackware7 box I had to download the
RTL patch (V2.0 for kernel 2.2.13),patch & compile the stock kernel
(Slackware dosent "fiddle" with the kernel source like RH) then get
the RCS library source and compile it for my kernels (both stock & RTL)
untar EMC & link the fresh RCS directory in
then edit the EMC source & makefiles to match my versions
set aside a weekend for all this and be ready for some frustration
(Im writing this from memory and may have skiped something/s)
this is a good way to learn a lot about Linux quickly,if you just
want to get EMC running you may want to stick with (yuck)RH5.2

BFP

PS, I dont want to start a distro holy-war on this list
but Linux is not JUST redhat,there are a lot of others out there
and most of them dont "customize" the kernel & file system the way
RH does,it tends to cause incompatability problems when you do that