Re: [Emc-users] Poor memory, or new feature?

[Gene Heskett]

On Tuesday 17 November 2020 18:59:14 Gene Heskett wrote:

> On Tuesday 17 November 2020 13:18:50 andrew beck wrote:
> > I will link some videos Gene.  And can resize some photos when I get
> > a sec.
>
> Okay.  I spent the afternoon putting a fresh bob in the G0704 kit,
> then tried to bore 1/4" holes lengthwise thru 5.5" of 1/2" alu, with a
> 3" drill hog bit. That means I was drilling 3" deep from both ends
> with the holes meeting in the middle. 4 such holes all the way thru, 3
> slightly missed each other but a 7mm reamer from both ends of the
> holes fixed that right up.  Now I need to hit the store and get a
> small bottle of lysol for the kool mist sitting in the coke bottle,
> and long johns for for some fish.  Somewhere I missed lunch and its
> catching up with me.
>
> Since  I have another, better motor coming for the 6040 I am tempted
> to put about 4 oz in the water tank, just for S & G. If it doesn't
> total the water pump, I haven't lost anything.
>
But beware, the lysol in a spray pump bottle from the grocery store is 
not the stinky stuff we all remember from our childhood, its now a soap, 
putting a head on the water and virtually odorless. I first put about 3 
squirts in the mister bottle, and about 20 in the water tank.  It been 
running at 4g's for about 8 hours  And its likely well north of the lcd 
thermometers top of 40C. And if it doesn't do squat I won't be 
surprised, it isn't the real stuff, nothing like the lysol I remember.

> [...]
>
> Cheers, Gene Heskett


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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Poor memory, or new feature?

[Gene Heskett]

On Tuesday 17 November 2020 13:18:50 andrew beck wrote:

> I will link some videos Gene.  And can resize some photos when I get a
> sec.
>
Okay.  I spent the afternoon putting a fresh bob in the G0704 kit, then 
tried to bore 1/4" holes lengthwise thru 5.5" of 1/2" alu, with a 3" 
drill hog bit. That means I was drilling 3" deep from both ends with the 
holes meeting in the middle. 4 such holes all the way thru, 3 slightly 
missed each other but a 7mm reamer from both ends of the holes fixed 
that right up.  Now I need to hit the store and get a small bottle of 
lysol for the kool mist sitting in the coke bottle, and long johns for 
for some fish.  Somewhere I missed lunch and its catching up with me.

Since  I have another, better motor coming for the 6040 I am tempted to 
put about 4 oz in the water tank, just for S & G. If it doesn't total 
the water pump, I haven't lost anything.

[...]
 
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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Poor memory, or new feature?

[andrew beck]

I will link some videos Gene.  And can resize some photos when I get a sec.





On Wed, Nov 18, 2020, 2:42 AM Gene Heskett  wrote:

> On Tuesday 17 November 2020 05:25:48 andrew beck wrote:
>
> > awesome gene
> >
> > my machines are full size cnc machines 5 and 6 tons.  they have
> > ballscrews installed and couplings etc.  covers and doors.
> >
> > all I need to do to mount the motors is about 4 hrs work for
> > everything.  I need to drill new holes in the motor mounts and shrink
> > in a ring and then bore out the flexible couplings to the new shaft
> > size.  everything else just works.  limit switches are all there etc
> > and all wired up already.  it makes it so much nicer when all that
> > stuff is all done already by the machine manufacturer.
> >
> > the first machine I did has a positional  accuracy of under 0.005mm
> > and I hope this next cnc mill to be even better as it almost
> > mechanically brand new.  it is the same size as a haas VF3
> >
> > regards
> >
> > Andrew
>
> As just an old fart hobbyist, I'm usually under financed, and for sure
> jealous! A Pix or 3  would be nice. But run them thru gimp and export
> as .jpg's compressed to 250k or less as the list will block if strait
> out of the camera at 5 megs.
>
> [...]
>
> 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)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page 
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Might have found an air pump for a small mister

[Gene Heskett]

On Tuesday 17 November 2020 10:29:43 Todd Zuercher wrote:

> Those disposable, oil free air compressors from harbor freight (or
> most other big box stores) are barely worth the zinc they are cast
> from.  And aren't good for much other than pumping up the occasional
> car tire, or powering a nail gun for hobby purposes.  They certainly
> are not up to continual usage at anything close to their rated CFM.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street 
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Gene Heskett 
> Sent: Tuesday, November 17, 2020 10:12 AM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] Might have found an air pump for a small mister
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> The pump from the soldering station is some sort of a scroll pump with
> very little pressure ability, which when its 50L a minute air delivery
> is sent thru a ball point pen tip looks as if its good enough as far
> as flow but lack of pressure concerns me. I found the maker in china
> and it sells for $6.70 in 10,000 lots minimum order. So I went looking
> for something with more pressure and found this one.
>
> na-20lpm-High-Flow-12V-DC-Micro-Air-Pump-Electric-Operated-Diaphragm-Pu
>mp.html>
>
> Only 15-18 L/minute, but up to 70 pksa whatever that is.  And it had a
> get sample button, so obviously I hit it. I'll let folks know when it
> has arrived. Needs around an amp at 12 volts. And std mister nozzles
> will need mods to better the atomizing.  Those el-cheapo gizmo's are
> very profligate with their use of air. Burns up a $125 HF 2hp air
> compressor. This makes far more sense for smaller machines spinning
> 1/8" tooling.

That is a given, although one like it built that garage 12 years ago. 

Compressing air is hard work because of the heat released. Which is why I 
can't understand the use of big roots type blowers to supercharge big IC 
engines in Dragsters. A 500 CID engine has to make the first 700 
horsepower just to pull the blower and put 20 psi in the intake manifold 
at 5 grand.

Latham used to make an axial flow multistage fan that could put 20 psi 
into a 272 ford v8 in the late 1950's that only needed 15 hp to do that 
job. I once watched a 58 ford 4 door with a Latham on it, do 145 
something in the quarter in about 9.7 seconds at Alton Ill. On street 
tires. Burning gas he drove it about a 100 miles to/from the strip that 
day and raced it the way he drove it, claimed it got 17 mpg on the road.  
That to me was an impressive step in the right direction. The high light 
of the day was seeing the guys from Speed-Sport Auto in Tucson AX blow a 
nitro burning hemi in a T bucket at about 160, rolled the remains to the 
pit, started grabbing boxes out of the pickup and built a complete fresh 
hemi, and had it barking at the line in 2h21m. We all turned on our 
headlights to light up the track as it was getting dark but when the 
tree turned green it set a new track record at 166 mph.

Me, I was driving a 49 Nash Ambassador that was actually quite a 
concealed weapon itself. Cruised at 90 mph, while getting 21 mpg, could 
do 120. But it had toys for brakes. Suffice to say. I had learned how to 
make that 236 cid engine run very well.  At rpms that self destructed 
piston rings from piston overspeeds as it was a stroker at 4 3/8". 
Designed at the time with every racing engine trick in it, bigger than 
bore tuliped  valves, big mushroom faced tappets so the cam could be 
both high and square, built to turn 8 grand and could, but not at that 
stroke, broke every ring in it into 1/4" pieces if you turned it much 
over 7G's.  The first of the unit bodies, it was rigidity personified 
and a dream to drive at any speed or traction angle if you felt like 
hanging the rear end out 3 feet and steering with the throttle. It 
didn't do anything you didn't tell it to do. But 70 years later I think 
rust has finshed them all. Which is sad, they were state of the art in 
high performance auto engineering in 1949.
>
> 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)
> If we desire respect for the law, we must first make the law
> respectable. - Louis D. Brandeis
> Genes Web page 
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
> ___
> Emc-users mailing list
> 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)
If we desire respect for the law, we must 

Re: [Emc-users] Might have found an air pump for a small mister

[Todd Zuercher]

Those disposable, oil free air compressors from harbor freight (or most other 
big box stores) are barely worth the zinc they are cast from.  And aren't good 
for much other than pumping up the occasional car tire, or powering a nail gun 
for hobby purposes.  They certainly are not up to continual usage at anything 
close to their rated CFM. 

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Gene Heskett  
Sent: Tuesday, November 17, 2020 10:12 AM
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Might have found an air pump for a small mister

[EXTERNAL EMAIL] Be sure links are safe.

The pump from the soldering station is some sort of a scroll pump with very 
little pressure ability, which when its 50L a minute air delivery is sent thru 
a ball point pen tip looks as if its good enough as far as flow but lack of 
pressure concerns me. I found the maker in china and it sells for $6.70 in 
10,000 lots minimum order. So I went looking for something with more pressure 
and found this one.



Only 15-18 L/minute, but up to 70 pksa whatever that is.  And it had a get 
sample button, so obviously I hit it. I'll let folks know when it has arrived. 
Needs around an amp at 12 volts. And std mister nozzles will need mods to 
better the atomizing.  Those el-cheapo gizmo's are very profligate with their 
use of air. Burns up a $125 HF 2hp air compressor. This makes far more sense 
for smaller machines spinning 1/8"
tooling.

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Might have found an air pump for a small mister

[Gene Heskett]

The pump from the soldering station is some sort of a scroll pump with 
very little pressure ability, which when its 50L a minute air delivery 
is sent thru a ball point pen tip looks as if its good enough as far as 
flow but lack of pressure concerns me. I found the maker in china and it 
sells for $6.70 in 10,000 lots minimum order. So I went looking for 
something with more pressure and found this one.



Only 15-18 L/minute, but up to 70 pksa whatever that is.  And it had a 
get sample button, so obviously I hit it. I'll let folks know when it 
has arrived. Needs around an amp at 12 volts. And std mister nozzles 
will need mods to better the atomizing.  Those el-cheapo gizmo's are 
very profligate with their use of air. Burns up a $125 HF 2hp air 
compressor. This makes far more sense for smaller machines spinning 1/8" 
tooling.

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Poor memory, or new feature?

[Gene Heskett]

On Tuesday 17 November 2020 05:25:48 andrew beck wrote:

> awesome gene
>
> my machines are full size cnc machines 5 and 6 tons.  they have
> ballscrews installed and couplings etc.  covers and doors.
>
> all I need to do to mount the motors is about 4 hrs work for
> everything.  I need to drill new holes in the motor mounts and shrink
> in a ring and then bore out the flexible couplings to the new shaft
> size.  everything else just works.  limit switches are all there etc
> and all wired up already.  it makes it so much nicer when all that
> stuff is all done already by the machine manufacturer.
>
> the first machine I did has a positional  accuracy of under 0.005mm
> and I hope this next cnc mill to be even better as it almost
> mechanically brand new.  it is the same size as a haas VF3
>
> regards
>
> Andrew

As just an old fart hobbyist, I'm usually under financed, and for sure 
jealous! A Pix or 3  would be nice. But run them thru gimp and export 
as .jpg's compressed to 250k or less as the list will block if strait 
out of the camera at 5 megs.

[...]

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Probe with PCB piece

[Gene Heskett]

On Tuesday 17 November 2020 04:22:01 andy pugh wrote:

> On Mon, 16 Nov 2020 at 20:59, Alan Condit  
wrote:
> > However, when I read the instructions on G38.2 it talks about the
> > switch opening. Can I invert the probe signal and use it for switch
> > closing?
>
> Where are you reading? The G38 docs don't talk about opening or
> closing, they talk about contact and loss of contact:
> http://linuxcnc.org/docs/2.8/html/gcode/g-code.html#gcode:g38
>
> The HAL pin probe-in should go high on contact. How that is achieved
> electrically and HALogically is implementation dependent.

Which is why I suggested using the in_not pin if its available. The 
spindle is generally grounded and using the bit of pcb for a contact 
results in a logic 0 on contact. Feed that into the in_not pin.
If using a std bob input the not module MUST be above anything in the 
addf order hat uses it else the approach velocity error gets out of 
hand, and you may damage the pcb with the first approach from the 
resultant servo-thread timed overshoot.  I also invert that when hole 
finding where I have a 3/4" teflon rod holding a length of 12 gauge 
copper wire with the probe wire separated into half the strands on 
either side of the probing wire and twisted back together. I run the 
spindle backwards at 500 or so revs, and probe all 4 quadrants then 
center it both ways and touch off. And I regularly can rerun the 
holefinder code with no more than .0002" of error either way the 2nd 
time. There, because the probe is spinning, I have a capacitor on the 
probe input that is discharged by a microsecond contact, and still has 
not recharged the capacitor by the time the servo-thread read rolls 
around at the next random millisecond.

But because my spindles aren't fixed, I use the pcb method for setting 
TLO's.


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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Poor memory, or new feature?

[andrew beck]

awesome gene

my machines are full size cnc machines 5 and 6 tons.  they have ballscrews
installed and couplings etc.  covers and doors.

all I need to do to mount the motors is about 4 hrs work for everything.  I
need to drill new holes in the motor mounts and shrink in a ring and then
bore out the flexible couplings to the new shaft size.  everything else
just works.  limit switches are all there etc and all wired up already.  it
makes it so much nicer when all that stuff is all done already by the
machine manufacturer.

the first machine I did has a positional  accuracy of under 0.005mm and I
hope this next cnc mill to be even better as it almost mechanically brand
new.  it is the same size as a haas VF3

regards

Andrew



On Tue, Nov 17, 2020 at 2:14 AM Gene Heskett  wrote:

> On Monday 16 November 2020 04:12:02 andrew beck wrote:
>
> > Sweet.  I have 8 big servo drives for all my machines turning up
> > tomorrow I think finally.  Will be so good to get my cnc lathe and
> > second cnc mill working.
> >
> But Andrew, that will generate a lot of 4 letter words, called "work". At
> my age, I ration that to what I can do with a 30% pump.
>
> Unless it was originally built with motors. adapting it for servo motors
> will be a lot of work. I think the most work I did was on the Sheldon
> lathe, it was in bad shape, compound broken, spindle bent, crossfeed in
> tatters. I had to strip it down to the bed and build it back up with new
> designs at every aspect.  Finding the right ball screws was just a
> start. The only thing left of the original X drive today is the crank
> bearing screwed into the front of the carriage.  And its been machined
> to be the new X anchor point complete with roller bearings in both
> directions. None of the taper attachment that was the original X anchor
> is still on the machine. I sealed up the trench in the cross feed where
> the screw lives so swarf can't get into the new ball screw, and I
> covered the new ball type Z screw with pleated bellows to keep swarf out
> of it.
>
> I used some motors I had on the shelf which weren't that well suited for
> the job, and just this summer replaced both of them with the new 2 and 3
> newton, 3 phase steppers that think they are servo's, reducing the
> stepper rattle about 99%, its now Casper the ghost when moving at
> cutting speeds, those 3 phase motors are very low noise. The drivers are
> MUCH smaller.
>
> And alarmed. I can run z into a stopped chuck jaw with a chipped tool
> mounted at 5 ipm, it see's the stoppage, kills the motor enables which
> allows them to spring back to clear the chuck jaw about 10 thou, and
> cancels all homes. And does it w/o crushing the $15 chip in the tool. I
> made clamps for the rear of the faceplates that clamp the backing plate
> to the spindle flange, and put a retuned vfd on the spindle motor.
>
> I've made some hal code show how far it turns at overtravel, and If I do
> the gcode right, calculates the overtravel distance when motion issues a
> reverse when doing rigid tapping. With an 8" 4 jaw chuck mounted, a good
> 35 lbs, and turning 100 rpm, the overtravel is .245 turn.
>
> I made a new apron plate, and it has a pair of 100 ppr dials, that I can
> drive by hand since there are not any hand cranks left, at selectable
> speeds starting at .0002" per click.
>
> LinuxCNC lets me correct for bed wear, which is considerable right in
> front of the chuck, so I can run it from the chuck to the tail stock at
> a maximum uncorrected error in the .002" range.  The great unknown is
> the error in the 1.5 meter long, grade C7 Z screw. The X screw is a bit
> better, but its history is unk. Backlash is in the range of 1 to 2 thou,
> both ways. Pretty good for a nearly 80 yo lathe
>
> That's good enough for the girls I go with these days. :)
>
> > So I'll be asking a lot of questions about linuxcnc again soon I
> > think.
>
> Bring `em on. I've not quite done it yet, but I'll learn about servo's
> since that is what I am hanging on the side of a Chinese BS-1 clone to
> run it. Using a brushed 100 watt sliding estate gate motor, which has an
> encoder in it and is a worm drive output.
>
> > Regards
> >
> > Andrew
>
> 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)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page 
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Probe with PCB piece

[andy pugh]

On Mon, 16 Nov 2020 at 20:59, Alan Condit  wrote:
>
> However, when I read the instructions on G38.2 it talks about the switch 
> opening. Can I invert the probe signal and use it for switch closing?

Where are you reading? The G38 docs don't talk about opening or
closing, they talk about contact and loss of contact:
http://linuxcnc.org/docs/2.8/html/gcode/g-code.html#gcode:g38

The HAL pin probe-in should go high on contact. How that is achieved
electrically and HALogically is implementation dependent.

-- 
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, 1912


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users