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Re: CNC Flood Coolant?

 

--- In CAD_CAM_EDM_DRO@y..., "Chris and Dee" <brunoblazer@y...> wrote:
This may get axed as off topic - and if so I apologize and would
welcome people to respond off list, its just that I know of no other
group that would have good ideas.

When I'm machining manually, I don't mind so much using the squirt
bottle for coolant supply. However, I'm not so sure that's going to
cut it when I get the CNC running so I wanted to setup an easily
reasons why this may not work? The only concern I have is duty
cycle, but if another pump is practically free, maybe its not an
issue. THoughts?
The electric fuel pump is your best bet. No duty cycle. The washer
pump will not hold up to oil bases. You could buy an external one new,
but if you like cheap, pick up an in tank type from the local salvage
yard. I like the Gm ones but what can I say.

I use one for my lathe.

Frank
0.0007" Resolution for Z axis, good enough?

John A. McFadden
 

I'm trying to convert my mill/drill to DRO on the cheap (being a college kid and not having much cash to spare), and right now I've got the option of doing it with 0.0004" resolution on all three axis for $350 or 0.0004" on X and Y and 0.0007" on the Z for $300. Is the higher resolution on the Z axis really critical for general machining? I'm new to machining, so I thought I would ask everyone on the list for input and thoughts.

John
Re: Toshiba laptop for CNC router

Marv Frankel
 

Jerry,
I have already uploaded that file to Bob.

Marv Frankel
Los Angeles

----- Original Message -----
From: "Carol & Jerry Jankura" <jerry.jankura@...>
To: <CAD_CAM_EDM_DRO@...>
Sent: Wednesday, October 30, 2002 5:36 AM
Subject: RE: [CAD_CAM_EDM_DRO] Toshiba laptop for CNC router


I don't know if this will help, but a google search for "T4500" DOS
Download
turned up several URL's. One looked interesting, so I followed it.



It pointed to a file - TSEP622.EXE - which contains the 'enhancements' for
the Toshiba notebooks. This might give you a lead as to what you're
looking
for.

Also, the DOS will be the same as any standard release. What's different
will be the drivers. If you know the kind of video board, etc. in the
machine, you can search google for those boards, and can often download
the
drivers from the manufacturer.

Hope this helps....

-- Jerry


|-----Original Message-----
|From: echnidna [mailto:echnidna@...]
|Sent: Wednesday, October 30, 2002 1:19 AM
|To: CAD_CAM_EDM_DRO@...
|Subject: [CAD_CAM_EDM_DRO] Toshiba laptop for CNC router
|
|
|Hi Group,
|
|I picked up a Toshiba T4500 486&#92;25 laptop for my CNC router so
|power brownouts wont damage the machine or work in progress.
|
|Its loaded with windows 31 and i would like to reformat it but i
|cannot locate much info on the special version of Toshiba Dos that
|it uses, despite intensive internet searching.
|
|Can anyone point me in the right direction
|OR
|Can anyone tell me how to make DOS setup files on floppies from
|the existing files on the laptop.
|
|Regards to all
|
|Bob Thomas
|
|
|
|Addresses:
|FAQ:
|FILES:
|Post Messages: CAD_CAM_EDM_DRO@...
|
|Subscribe: CAD_CAM_EDM_DRO-subscribe@...
|Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@...
|List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@...
|Moderator: jmelson@... timg@... [Moderator]
|URL to this group:
|
|OFF Topic POSTS: General Machining
|If you wish to post on unlimited OT subjects goto:
|aol://5863:126/rec.crafts.metalworking or go thru Google.com to
|reach it if you have trouble.
|
|
| I consider this to
|be a sister site to the CCED group, as many of the same members
|are there, for OT subjects, that are not allowed on the CCED list.
|
|NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
|THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
|bill
|List Mom
|List Owner
|
|
|
|Your use of Yahoo! Groups is subject to
|
|
|



Addresses:
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Subscribe: CAD_CAM_EDM_DRO-subscribe@...
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List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@...
Moderator: jmelson@... timg@... [Moderator]
URL to this group:

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.


I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner



Your use of Yahoo! Groups is subject to

Nuts and Volts cnc article

bdrmachine
 

What ever happened to the Nuts and Volts cnc article that was to air
in the Nov. issue?


Brian
Re: Bridgeport Series II CNC specifications

Raymond Heckert
 

I just measured my SERIES I, and it's 87.5" OA.H. Not sure
how S. I & S. II compare. Could you bring the machine in on
it's 'back', or it's 'tummy'... maybe on it's side? Cut a
hole on the door if you must, but get that machine in, and
working!

RayHex

----------
From: tmartin23 <tmartin23@...>

I have the opportunity to try to squeeze one of these
machines into
my garage and I have been having difficulty finding out
the
dimensions of this beast. This is an early 1980's Boss5
/ stepper
motor controlled machine with the rigid ram and
kwik-switch tooling.
Does anyone know the specific height requirements? A
manual Series
II Special Bridgeport is 84" - I've been told. I know
this CNC
machine is a bit taller than that. Any ideas?
Re: 0.0007" Resolution for Z axis, good enough?

Country Bubba
 

John,
I did my mill/drill for less than $200 for all THREE axis and that included
a used computer/monitor!!!

The biggest cost will be the encoders; however if you can find an old
deskjet printer, you can get a 360 lPI strip and encoder. Realize this will
be a max of about 10" long; but that will be good for the Y and Z axis.
This would leave you having to get only the X axis encoder at a higher price.

360 LPI in quadrature will give you 1/ (360*4) or a resolution of 0.00069"
See my tag line for info on how I did it.

At 05:15 PM 10/30/02 -0800, you wrote:
I'm trying to convert my mill/drill to DRO on the cheap (being a college
kid and not having much cash to spare), and right now I've got the option
of doing it with 0.0004" resolution on all three axis for $350 or 0.0004"
on X and Y and 0.0007" on the Z for $300. Is the higher resolution on the
Z axis really critical for general machining? I'm new to machining, so I
thought I would ask everyone on the list for input and thoughts.

John
Bubba

OLDER THAN DIRT
Country Bubba
(Actually the inventor of Country and Bubba)

axtein@...
LaGrange, GA
Re: Added a VFD to my CNC mill

Country Bubba
 

John,
Thanks as that makes more sense than anything I have heard!

As stated previously, I have limited my upper rpm, but this is mainly due
to the heating that occurs on the lower end of the quill. This has been
reported by many and seems to be related to the shaft seal more than
anything else. (Poor design)??????

Anyhow, I rarely need any speeds above 2000 rpm.



At 08:29 PM 10/30/02 +0000, you wrote:
--- In CAD_CAM_EDM_DRO@y..., Country Bubba <axtein@d...> wrote:
Dan,

I also have another file from a motor manufacturer that
includes this information:

"Maximum Safe Mechanical
Speed Limits
(does not imply constant
horsepower capability)
Motor @ 1800 rpm
Frame Direct Belted*
56-184 5400 2250
213-256 4200 2250
284-286 3600 2250
324-326 3600 2250
364-365 2700 2250
404-449 2700 2250
*Belted per NEMA MG1-14.41 (dated
1993)"

nobody that I have talked with can tell me WHY the
belted rate is lower than the direct drive rate???
I can't be sure, but I expect that the side load on the
shaft and bearings in belted duty is the reason for the
lower speed limit. I am most familiar with larger motors
(5HP and up, to 600-1000 HP). In the larger sizes, there
are different motor designs for belted vs. direct drive.
Bearings and shaft sizes, among other things, are adjusted
to handle the side loading.

John Kasunich
Bubba

OLDER THAN DIRT
Country Bubba
(Actually the inventor of Country and Bubba)

axtein@...
LaGrange, GA
Re: DRO issue "HEDs in hand"

John A. McFadden
 

Jeff:
Its $85 for 600mm, $50 for 166-200mm lengths (asked about that length range
for my Y and Z axis).
Its a good thing you mentioned EncoderTech, I never did the math on the
metric scales, and only looked at the 720CPI scales but took them off my
list of possibles when they said that they did not have any longer than
3.25". With .0004" resolution and Don Mauch's method for protecting the
strips, it looks like I am good to go.

I am also a little confused by the math, the US Digital encoders and strips
can only quadrature out, giving the resolution as four times the lines per
inch of the scales, but Encoder Tech's encoders double the resolution and
then quadrature it? Seems a little strange to me, but if it works, it
works. What are you using to read the output of the encoder? Are you
getting .01mm resolution?

John
Hobby CNC Close Out Prices and New Website

darigotti
 

Hobby CNC is pleased to announce that we have lowered the price on
our 60oz-in CNC package to close out levels. NEW lower prices on our
planset, driver boards, and other CNC packages too!
We have also updated our website with a new look.
Please have a visit. www.hobbycnc.com

Thank You
Dave Rigotti
Hobby CNC
Coolant pumps

Bill Higdon
 

I don't know about using a windsheld washer pump for this for safety reasons. IMHO a external electric fuel pump from a car would be a better idea.
Bill Higdon
Re: DRO issue "HEDs in hand"

John A. McFadden
 

Fast response time on Encodertech's part (like within 3 minutes of my
query), there wont be any 720CPI scales in lengths longer than 3.25" until
someone pays for the master to be made ($1200) and then only the length that
customer pays for will be made. The price of the LM25cpmm-3S Module is
$39.00 each, the price of the 25cpmm-600 mm Scale is $85.00 each.

John
Re: How do I 'make' a ballscrew antibacklash nut?

 

--- In CAD_CAM_EDM_DRO@y..., "dspinnett" <dspinnett@y...> wrote:

Some ballnuts has one end with outside fine treads on it, put
both
ballnuts agaist each other and using the adjusting outside nut
you
can put pressure on the two ballnuts forcing them to pull apart
from
each other thus, preloading them.
sort of split acme nuts.
The springs, takes the adjusting nut place ,and it works ok only
for
small loads.

Ah, I think get it.

If I went the adjusting nut route, I would thread both ball nuts
into
the center coupling nut then mount just one of the ball nuts to the
bed attaching where the original split brass nut went?

If so, should be easy enough.. On the square ball nuts, is there
room
to bolt the flat directly through the corners of the body, or do
you
always have to have a flange to mount to?

Thanks for the input..

Dave.
I don't know what size ballscrews you need, but technoisel have
ballscrews that have a zero backlash ballnuts, cheaper and easyer to
install than any other ballscrews.
they have it with 16mm od ballscrews, and 25mm od.
I've got three 16mm diameter ballscrews 1m long and three ballnuts
for about $450.00 bucks.
the nuts are split in half, so i just needed to make a square block
with a hole on it for the nut,adjusting is just a matter of tightening
the setscrew and it's all done.
the nut is split axialy not in a cross section.
I'm using it on my minimill and on a 24x24 gantry with good results.
Re: Toshiba laptop for CNC router

 

In a message dated 10/30/02 8:38:15 AM Eastern Standard Time,
jerry.jankura@... writes:


I don't know if this will help, but a google search for "T4500" DOS Download
turned up several URL's. One looked interesting, so I followed it.



It pointed to a file - TSEP622.EXE - which contains the 'enhancements' for
the Toshiba notebooks. This might give you a lead as to what you're looking
for.

Also, the DOS will be the same as any standard release. What's different
will be the drivers. If you know the kind of video board, etc. in the
machine, you can search google for those boards, and can often download the
drivers from the manufacturer.

Hope this helps....

-- Jerry


I must have missed the original post for this subject. Is this notebook for
an Italian machine by any chance? E-mail me off list, I may be able to help
if you are looking for the DOS software to communicate with the router.



Regards,

Randy Abernathy
4626 Old Stilesboro Road
Acworth, GA 30101
Phone / Fax: 770-974-5295
E-mail: cnc002@...
We service, install and repair industrial woodworking machinery
Specializing in SCM / SCMI CNC Panel Saws and Routers
Re: Tonmac Mills - Good Choice for Retrofit?

Marv Frankel
 

Mark,
If it was my money, I'd look for a good used Bridgeport here on the
west coast, which can be had for less than your $2,000.

Marv Frankel
Los Angeles

----- Original Message -----
From: "natchamp_87" <mark@...>
To: <CAD_CAM_EDM_DRO@...>
Sent: Wednesday, October 30, 2002 10:39 AM
Subject: [CAD_CAM_EDM_DRO] Tonmac Mills - Good Choice for Retrofit?


I'm still in the process of deciding what mill to get for my retrofit
project, burning lots of midnight oil on the net. I came across this
manufacture:



I can purchase this brand spankin new for 2k. Only problem is
shipping which is 1,700 to West coast. I might be able to piggy back
on another shipment because the 20' cargo container can hold way more
than one machine.

I know its not a BP, but what do you guys think?
Mark


Addresses:
FAQ:
FILES:
Post Messages: CAD_CAM_EDM_DRO@...

Subscribe: CAD_CAM_EDM_DRO-subscribe@...
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@...
List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@...
Moderator: jmelson@... timg@... [Moderator]
URL to this group:

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.


I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner



Your use of Yahoo! Groups is subject to

CNC Flood Coolant?

Chris and Dee
 

This may get axed as off topic - and if so I apologize and would
welcome people to respond off list, its just that I know of no other
group that would have good ideas.

When I'm machining manually, I don't mind so much using the squirt
bottle for coolant supply. However, I'm not so sure that's going to
cut it when I get the CNC running so I wanted to setup an easily
controlled flood coolant system (but cheap - since I'm good like
that). I was going to try building one using a windshield washer
pump. You can basically get them next to free (if not free) at a
junkyard and they're easily controlled with a dc relay off the
parallel port. Has anybody tried this? Anybody know any good
reasons why this may not work? The only concern I have is duty
cycle, but if another pump is practically free, maybe its not an
issue. THoughts?
Re: DRO issue "HEDs in hand"

John A. McFadden
 

As of 10/11, Encodertech did not have any 720CPI strips in stock in lengths
above 3.25", that might have changed, I did not ask. I'll look into it.

John

Hello,

I am using linear strips/encoders from www.encodertech.com. The
encoder and strips are about the same price as the US Digital stuff
and comes in a 0.01mm resolution which is about 0.0004". The module
is a LM-25CPMM-3T and you can get 600mm length strips. The scales are
$49.00 and modules $39.00 (almost a year ago). You can order right
from them and they are in Fallbrook CA. I have no connection to them
other than I used their product on my lathe.

I am in Canada and am used to working in mm so the .01mm accuracy
worked out well for me.

TTYL, Jeff
Re: Added a VFD to my CNC mill

 

--- In CAD_CAM_EDM_DRO@y..., Country Bubba <axtein@d...> wrote:
Dan,

I also have another file from a motor manufacturer that
includes this information:

"Maximum Safe Mechanical
Speed Limits
(does not imply constant
horsepower capability)
Motor @ 1800 rpm
Frame Direct Belted*
56-184 5400 2250
213-256 4200 2250
284-286 3600 2250
324-326 3600 2250
364-365 2700 2250
404-449 2700 2250
*Belted per NEMA MG1-14.41 (dated
1993)"

nobody that I have talked with can tell me WHY the
belted rate is lower than the direct drive rate???
I can't be sure, but I expect that the side load on the
shaft and bearings in belted duty is the reason for the
lower speed limit. I am most familiar with larger motors
(5HP and up, to 600-1000 HP). In the larger sizes, there
are different motor designs for belted vs. direct drive.
Bearings and shaft sizes, among other things, are adjusted
to handle the side loading.

John Kasunich
Re: Names One of the very few Off Topic posts allowed......................

 

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
Bill,

Do you have an exact date in April? If scheduling permits, I will
fly
out for the day to make it.

Mariss
If you come to NAMES, bring Geckos - you will leave with money!
(My money anyway... I have decided to use Geckos for my Shoptask
conversion. Haven't bought them yet cause I haven't had the time
to work on it much.)

I look forward to the opportunity to meet you and talk about
power electronics and motor control. (I design high power AC
drives for a living, but my knowledge of small servo and
stepper drives is sketchy at best.)

John Kasunich
Re: Tonmac Mills - Good Choice for Retrofit?

natchamp_87
 

Thanks Jerry, I'm going to follow up with the link you provided to
get info on them too. It wouldn't take too many people to make the
shipping cost dramatically reduce.
Mark

--- In CAD_CAM_EDM_DRO@y..., Jerry Kimberlin <kimberln@a...> wrote:
natchamp_87 wrote:



I can purchase this brand spankin new for 2k. Only problem is
shipping which is 1,700 to West coast.
I know its not a BP, but what do you guys think?
It is an attractive price and machine size. In fact I might be
interested. They are made in China, however. That may be a
downside against which one could compare those made in Taiwan.
See offerings at: .
If you go thru all the pages, you will come to the GEM500GV and
the GEM600PV. A couple years ago these machines were offered in
CNC versions with ball screws, etc. We were all wondering if the
GEM500 could be had without the control, but with the ball
screws. Inquiries never came to anything so far as I know. The
GEMs are mill drills but very unordinary ones.

I've never seen a tonmac so far as I know. They may be rebranded
over here, of course. Have you actually seen one in the flesh?

OTOH, a decent Bridgeport (Boss 6 or better with servo motors)
can be had for less money, or so I'm told.

JerryK
Re: NAMES get together

 

--- In CAD_CAM_EDM_DRO@y..., "Dave Kowalczyk" <dkowalcz@d...> wrote:
Matt:

It's pretty early to tell for sure, but I'll probably be there
again in 2003.
Ditto... I went to NAMES for the first time this year. I spent
most of Sunday hanging around the CNC area talking to Jon Elson
and others. They pointed me to this group and re-kindled my
interest in CNC and computer controlled motion (includes robotics
as well as machines). I haven't had much time to work on it, but
I'm slowly gathering parts and materials to CNC my Shoptask.

Since it's noisy and hard to find people at the show, a CNC
pow-wow is an excellent idea, perhaps on one of the evenings.
I was a bit frustrated with how difficult it was to socialize
at the NAMES 2002; and there were a few folks I would have
really liked to chat more with.
Good idea!

If someone lives near the site and is willing to host, I'd
say a good CCED house party would fit the bill.
I live closer than you, but Cleveland is still a little too far
from Detroit for a pow-wow site.

Question for Ray Henry: Will there be BDI installs, etc., at
NAMES next year?

John Kasunich
48361 - 48380 of 99862