开云体育

I did thread in 3/4 drill rod at 1500 RPM The pitch was 10 so they
were some deep threads ;) I would say yes to the to slow breaking
inserts because the steel will not shear the same at low speed. I
have had many people in my shop go slow and they have had No luck.
The best way I have found is to find the specs and give it a shot.

If you want to see fast check out the SECO Group No. 1 There
recomindation on the low side is 475 FPM and up to 540 FPM for steel.
The insert has to be RIGHT on the CL. the releaf angles are made to
be on the CL. (people with CNC's are lazy with lathe tools) I can
show you how the Mori SL-15M holds the tool if you like to get the CL
right everytime.

Happy threads
Brian

John:

I'll look into that..

Art
www.artofcnc.ca

Art,

Is it possible to have vertically aligned text on buttons? It would be nice
in some instances to be able to have vertically aligned text if a person
needed a tall skinny button to make the screen look better.

John Guenther
'Ye Olde Pen Maker'
Sterling, Virginia

Steve:

Currently, running a G32 with no spindle feedback will stop the code. If
you want to dry run, you need to have the index pulse coming in. I will
change that soon, but it was only a test. It is the index pulse which
triggers the G32 into operation.

Art
www.artofcnc.ca

Art - Just tried dry running a file but it's stopping on the line
before a G32 even though "use spindle feedback" is turned off? Makes
life a bit difficult for checking code.

--
Steve Blackmore

Tom:

Very close. I am simply trying to come to grips on the best avenue for it.
For example, I could program in an index pulse when the X axis has moved a
particular number of steps or is on a numbered step boundry, for example,
pulse whenever X is on a multiple of "x"mm's. This would create a sampled
grid.
In a buffered controller, there are limitations on the ways this can be
done. I cannot do, for example, multiplication or division in the Ring0
code. It is not permitted. SO I have to pre-plan the pulseing methods based
on integer arithmetic and I have to do it in real-time. I can get around
this somewhat by codeing the index pulses into the buffered stream, but even
then I have to have a way to devise if its time for the pulse and a way to
give you as much control as possible over the pulseing interval.

Any idea's you have are welcome. The work I am doing presently would allow
me to get it done almost right away.

Art
www.artofcnc.ca

Hi Todd:

I am looking into it..


Art
www.artofcnc.ca

Brian,
Before I used the HSS bit, I tried carbide threading inserts and
chipped two of them, the tiniest piece broke off the end. I had to
use a magnifier to see it but I heard when it happened. In your
opinion, would too slow a speed cause that?

Also, is the correct height at dead center, or a smidgeon above.

Jerry

PS The material is drill rod.




--- In mach1mach2cnc@..., "barker806" <barker1@m...>
wrote:

Wow

I think I may be a bit out there but I run about 2000 RPM for a
thread that small..

That is only about 325 FPM. That is SLOW for Carbide and you will

get

a better finish at that speed. We run the SECO threading inserts

and

that is what it calls for.

So the question is will it Thread at the Higher speeds? A crash at
that speed would not be good...

Have a good one.
Brian

On Tue, 12 Aug 2003 14:08:29 -0000, you wrote:

Steve, a week or so ago I posted a message asking for any info on low
cost PCI parallel port addin cards. You responded that the Lava card
was good and only cost $16.

I cannnot find this card anywhere that doesn't charge $30 or more
when shipping is added in.

Hang on a minute, who mentioned including shipping??



at $13 !! - took about 30 seconds to find!

Can you please tell me where you buy the Lava PCI card for $16. I
need a number of these and I would appreciate the information.

It doesn't help that I don't know what country you are in, but I'm
sure 10 minutes on Google will find something to suit??

--
Steve Blackmore

Hello Art,

Hopefully you can squeak it in... Excellon drill files are pretty
basic; your hpgl import could likely be tweaked to allow for their
format...

BTW, I too think control is control, and cam is cam.

Ballendo

"Keep it simple, keep it pure and get rid of all
the CAM functions."

<snip>with the possible exception of Gerber Drill code at some

point if I can squeak it in..

Wow

I think I may be a bit out there but I run about 2000 RPM for a
thread that small..

That is only about 325 FPM. That is SLOW for Carbide and you will get
a better finish at that speed. We run the SECO threading inserts and
that is what it calls for.

So the question is will it Thread at the Higher speeds? A crash at
that speed would not be good...

Have a good one.
Brian

Hello Art,

What is the status on the output pulses for laser digitizing?

Thanks,
Tom

To: Steve Blackmore

Steve, a week or so ago I posted a message asking for any info on low
cost PCI parallel port addin cards. You responded that the Lava card
was good and only cost $16.

I cannnot find this card anywhere that doesn't charge $30 or more
when shipping is added in.

Can you please tell me where you buy the Lava PCI card for $16. I
need a number of these and I would appreciate the information.

Thanks,
Tom Moser

On Tue, 12 Aug 2003 12:51:49 -0000, you wrote:

Maybe a few things made this less than a perfect test:
The extrenely light cuts kept the machine going at a constant speed,
within a couple RPM.
Even with this light cut, there was some chatter, which I couldn,t
hear but I can see on the photo. I need to read up on tool shape and
height for threading.
On the other hand there was some runout as I didn't take time to do a
truing pass before cutting.
I'm not sure the speed was right. The piece is 5/8" diameter and I
cut at 300 rpm with coolant, is that about right Steve?

A little bit slow maybe, for a 1/2"x20 UNF my old post processor would
have done it at 500rpm, with 3 passes at 10 thou, one at 4 thou and
one spring pass. (Total thread depth of 34thou)

That's with an insert, I have 10 thou set as max depth cut for
threading so it works it out itself.

Certainly I'm happy with it, and it's a start for more rigorous
tests, like taking a cut that does slow the machine.

May I ask the more experienced, what size cuts would you take cutting
20 threads per inch on a non-cnc machine?

At that diameter I probably wouldn't have run more than 200rpm
manually!

--
Steve Blackmore

Maybe a few things made this less than a perfect test:
The extrenely light cuts kept the machine going at a constant speed,
within a couple RPM.
Even with this light cut, there was some chatter, which I couldn,t
hear but I can see on the photo. I need to read up on tool shape and
height for threading.
On the other hand there was some runout as I didn't take time to do a
truing pass before cutting.
I'm not sure the speed was right. The piece is 5/8" diameter and I
cut at 300 rpm with coolant, is that about right Steve?

Certainly I'm happy with it, and it's a start for more rigorous
tests, like taking a cut that does slow the machine.

May I ask the more experienced, what size cuts would you take cutting
20 threads per inch on a non-cnc machine?

Jerry




--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:

Jerry:

Your pictures have made me very happy. Its only a start, much more

needs to

be done, but you have proven the concept can work (Which I was very

worried

about, buffered pulse threading was a stretch at best...). I only

now had

the chance to see the photo's and I must say, they exceed my

expectations

for single pulse threading. Hopefully others will find results to be
similar.

Thanks again for your efforts.
Art
www.artofcnc.ca

Hi,
Is there a way to make a line of the macro execute before starting
the next line? It seems like the macros execute by type of call not
the order the lines are entered.
Todd

"Keep it simple, keep it pure and get rid of all
the CAM functions."

It is a reality that in order to develop something like Mach2, a certain
amount of CAM functionallity must be included in order to appeal to the
broadest segment of the user community. I have committed to adding one
further thing to DXF and that is layer ordering, after that the DXF
functionallity will stay at that level for the forseeable future.
I know from the many letters and questions I get that someone is missing
the boat in terms of offering a "CAM for Dummy's" program to do all the neat
simple stuff that is desired out there at a very low price, and I may, one
day have to dive into that as a separate project, but for now, my plan is
simple, make Mach2 into the best controller it can be. My time for the most
part will be spent tightening the code and its capabilities until it will
work across the broadest spectrum of possible uses. The base Mill program is
almost complete, with the addition of multi-res screens and the removal of a
couple more esoteric bugs it will be ready for release. Mach2Turn will then
be completed. And then more capabilities will be added to both in terms of
speaking to the outside world. The G2002 will be hooked up, other IO cards
will be allowed and closed loop type of operations will be added. CAM
functionallity has a very low priority until all else is at least underway
and being tested with the possible exception of Gerber Drill code at some
point if I can squeak it in..

(Just a future outlook...)
Art
www.artofcnc.ca

Jerry:

Your pictures have made me very happy. Its only a start, much more needs to
be done, but you have proven the concept can work (Which I was very worried
about, buffered pulse threading was a stretch at best...). I only now had
the chance to see the photo's and I must say, they exceed my expectations
for single pulse threading. Hopefully others will find results to be
similar.

Thanks again for your efforts.
Art
www.artofcnc.ca

I second that, or third, whatever.
Keep it a controller only.

Alan Trest



"carlcnc" <carlcnc@y...> wrote:

Jerry,
Threads look good. I'm glad someone is giving this a try.
I'm in the process of converting an old atlas 6" to cnc and threading
is one of the major jobs I want to use it for. Can I ask what you are
using for a spindle sensor?
Thanks,
Mike

--- In mach1mach2cnc@..., "ozzie34231" <Ozzie@c...> wrote:

Hi All,
After finishing my ball screw project and building a new

adjustable

mount for my spindle index sensor, I thought I'd try cutting a

thread.