Re: [Emc-users] Test of AC servo motors

[Bengt Sjölund]

Hi Jon,

Can not find any information but I assume they are PM.
These are Mavilor BL series with resolvers ( BLS )

Bengt


Den 2018-10-04 kl. 18:00, skrev Jon Elson:

On 10/04/2018 07:30 AM, Bengt Sjölund wrote:

Hi folks,

I have several AC servo motors but no drivers, I would like to test 
these to verify that they all work and are OK.


Can I use a VFD to do the testing or will I damage eiher motors or VFD?

All motors are 3-phase 220VAC and VFD is a single-phase 230VAC input 
so  0 to 230 3-phase output.


Are these induction motors or permanent magnet motors?  If induction, 
then any VFD should work fine.  If permanent magnet, then many VFDs 
will work fine, but some will complain.


Jon


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Re: [Emc-users] Test of AC servo motors

[Bengt Sjölund]

Hi Andy,

Well it is a bigIF for one STMBL ;) Do you have one to spare?
These are fitted with resolvers so STMBL would be nice.
I have 7 motors to be checked.

VFD test might reveal if there is some mechanical issues such as bearings.

Cheers
Bengt


Den 2018-10-04 kl. 15:26, skrev andy pugh:

On Thu, 4 Oct 2018 at 13:32, Bengt Sjölund  wrote:


I have several AC servo motors but no drivers, I would like to test
these to verify that they all work and are OK

What do you want to test?

The VFD probably won't do any harm but won't tell you much about the
encoder/resolver.

If you can get your hands on an STMBL drive then you can test properly
as it accepts most of the common feedback types (quadrature encoder,
resolver and a range of serial data formats)

The VFD test won't tell you very much more than you can determine by
shorting the power wires in pairs in all combinations and turning the
shaft by hand.
(tells you if the magnets work and if the coils are open-circuit)




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[Emc-users] Test of AC servo motors

[Bengt Sjölund]

Hi folks,

I have several AC servo motors but no drivers, I would like to test 
these to verify that they all work and are OK.


Can I use a VFD to do the testing or will I damage eiher motors or VFD?

All motors are 3-phase 220VAC and VFD is a single-phase 230VAC input so  
0 to 230 3-phase output.



Cheers
Bengt



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Re: [Emc-users] More on bed wear fix

[Bengt Sjölund]

6082 is a good candidate that machines well if you can get it to fair price.


Den 2018-09-25 kl. 16:51, skrev Gene Heskett:

On Tuesday 25 September 2018 07:19:12 andy pugh wrote:


On Tue, 25 Sep 2018 at 11:15, Gene Heskett 

wrote:

This is also true. But that test bar costs money too.

It can stay in stock as useful material. I am talking in terms of a
light cut on a stiff aluminium bar between centres.

What diameter would you consider as being stiff enough, Andy, in say 7075
alloy? (example 3'of2.5"=172 USD)

In 6061?(3'of3"=117.48 USD)

2024?(3'of2.5"=172USD)

6061 is cheaper, but its machinability sucks. Like bubble gum, it must be
kept cold to machine well. Or even to saw.

And I'd likely buy a larger dia just so I could make bigger stuff out of
it later. A 3' piece of 6" is 682 USD and at 100 lbs plus packing would
have to come by freight truck. I'd absolutely have to rig coolant on
everything too. Including buying a power hacksaw I don't have room for.

I have less than a foot left of a 40" long, nominally 6.25"x7" bar I
found at a scrap yard 20 years ago and bought for 50 cents a lb.

I've made lots of stuff out of it, but its packed the flutes full and
broken several hundred dollars worth of cutting tools too. No clue what
alloy, but it sure is difficult stuff to work with as its gummy at room
temps, getting nearly impossible to work long before its too hot to
touch.





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Re: [Emc-users] Scroll jaw G code?

[Bengt Sjölund]

https://a360.co/2vqj5lD

Here is my first test, will 3D print tomorrow and see if I'm close or not.

Bengt


Den 2018-08-07 kl. 23:02, skrev Gene Heskett:

On Tuesday 07 August 2018 16:48:47 jeremy youngs wrote:


This brings up an argument against doing it aligned with an axis but
s/b aligned at 45 degrees so there is never an axis direction
reversal while the tool is within the material. Its been my
experience, with the quality of machine and ball screws I can
afford, that one can never get a completely invisible axis reversal
although I do have bearings seated in such carvings, carved on a
micro-mill after very carefully setting the XY axis's backlash.
Sure, lay it out and generate the code aligned with an axis just
because its easier that way, but mount the jaw holding vise at
nominally 45 degrees, measure its angle with a touch probe and sci
calculator, and rotate the co-ord map to match. That will move any
direction reversals to outside of the workpiece. Voila! Perfect
curves w/o any backlash artifacts.


But is you mill good enough to cut a spiral?   Getting the g-code
is the easy part.


If you draw the spiral in cad, then choose a section of maximum
radius, and minimum radius that a jaw 'tooth' will traverse.

Now superimpose those two profiles and lop off any excess,
keeping only the intersecting area.
Repeat for all jaw 'teeth'
Then hand code the segment

Brilliant


Thanks for the flowers. :)

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Re: [Emc-users] Scroll jaw G code?

[Bengt Sjölund]

OK, managed to get me a spiral with 6mm pitch 3mm wide.
So now I have to try tracing out sutable parts from scroll and copy over 
the other, each trace from start and end of scroll.

Then make a 3D print to verify my doings.

Hints on tracing?


Den 2018-08-07 kl. 20:46, skrev Bengt Sjölund:
No go = FRUSTRATION 360 just shuts down, have been doing this for few 
days now.

Got an update today ut still behaving badly!

Will retry and report back if I succeed


Den 2018-08-07 kl. 20:22, skrev Chris Albertson:

try this

Create --> Coil.

The choose a flat coil with zero height.   In this case you want to 
use a
square cross section and then apply a 2-sided chamfer to the square 
to make
a taper.   But maybe you like square?   maybe some small fillets. to 
take

the sharp edges off.

But  the "trick" is the relish you can make a coil with zero 
elevation gain

per turn, kind of like the main spring in an old clock.

I just tested this out, take about 2 minutes after you think to try 
using

"coil"



On Tue, Aug 7, 2018 at 11:04 AM Bengt Sjölund  wrote:


Well Chris, I can not find a way to this in Frustration 360 ;)
Give me a hint what commands to use, and yes my mill is sturdy 
enough to

do the job.

/Bengt


Den 2018-08-07 kl. 19:33, skrev Chris Albertson:
Why not model it in Fusion 360?  The scroll is a constant spiral 
and most

3D modelers can do that.  I don't see any reason why I couldn't make a
chuck in Fusion.  Then once you have the model you can use some of
Fusion'stoolpath generators to create the g-code.  The software is 
free

but

the skill needed to use it take time.

On Tue, Aug 7, 2018 at 3:41 AM Bengt Sjölund  wrote:


Hi,
Looking for a g code generator for scroll jaws.
I have a Ø125mm 3-jaw chuck with 6mm scroll pitch and would like 
to be

able to mill my own soft jaws.
Have bee searching the web but I can not find anything. Any help
pointing me in right direction would be appreciated.

Cheers Bengt




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Re: [Emc-users] Scroll jaw G code?

[Bengt Sjölund]

No go = FRUSTRATION 360 just shuts down, have been doing this for few 
days now.

Got an update today ut still behaving badly!

Will retry and report back if I succeed


Den 2018-08-07 kl. 20:22, skrev Chris Albertson:

try this

Create --> Coil.

The choose a flat coil with zero height.   In this case you want to use a
square cross section and then apply a 2-sided chamfer to the square to make
a taper.   But maybe you like square?   maybe some small fillets. to take
the sharp edges off.

But  the "trick" is the relish you can make a coil with zero elevation gain
per turn, kind of like the main spring in an old clock.

I just tested this out, take about 2 minutes after you think to try using
"coil"



On Tue, Aug 7, 2018 at 11:04 AM Bengt Sjölund  wrote:


Well Chris, I can not find a way to this in Frustration 360 ;)
Give me a hint what commands to use, and yes my mill is sturdy enough to
do the job.

/Bengt


Den 2018-08-07 kl. 19:33, skrev Chris Albertson:

Why not model it in Fusion 360?  The scroll is a constant spiral and most
3D modelers can do that.  I don't see any reason why I couldn't make a
chuck in Fusion.  Then once you have the model you can use some of
Fusion'stoolpath generators to create the g-code.  The software is free

but

the skill needed to use it take time.

On Tue, Aug 7, 2018 at 3:41 AM Bengt Sjölund  wrote:


Hi,
Looking for a g code generator for scroll jaws.
I have a Ø125mm 3-jaw chuck with 6mm scroll pitch and would like to be
able to mill my own soft jaws.
Have bee searching the web but I can not find anything. Any help
pointing me in right direction would be appreciated.

Cheers Bengt





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Re: [Emc-users] Scroll jaw G code?

[Bengt Sjölund]

Well Chris, I can not find a way to this in Frustration 360 ;)
Give me a hint what commands to use, and yes my mill is sturdy enough to 
do the job.


/Bengt


Den 2018-08-07 kl. 19:33, skrev Chris Albertson:

Why not model it in Fusion 360?  The scroll is a constant spiral and most
3D modelers can do that.  I don't see any reason why I couldn't make a
chuck in Fusion.  Then once you have the model you can use some of
Fusion'stoolpath generators to create the g-code.  The software is free but
the skill needed to use it take time.

On Tue, Aug 7, 2018 at 3:41 AM Bengt Sjölund  wrote:


Hi,
Looking for a g code generator for scroll jaws.
I have a Ø125mm 3-jaw chuck with 6mm scroll pitch and would like to be
able to mill my own soft jaws.
Have bee searching the web but I can not find anything. Any help
pointing me in right direction would be appreciated.

Cheers Bengt



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Re: [Emc-users] Scroll jaw G code?

[Bengt Sjölund]

Here is it done *manually* with a jig. Interesting in just moving a pin 
for slots and other size of pin for jaw 2 and 3 slots for the offset.

http://homews.co.uk/page99a.html

The math is explained here ( this is way out of my league but might help 
you out there to be trivial ? )
Maybe SK.8 can be of help to do the math, I think that using a vise 
stops with different offsets would do.

http://homews.co.uk/SoftJawM02.pdf

/Bengt


Den 2018-08-07 kl. 16:21, skrev Gene Heskett:

On Tuesday 07 August 2018 09:40:39 andy pugh wrote:


On 7 August 2018 at 11:39, Bengt Sjölund  wrote:

Looking for a g code generator for scroll jaws.
I have a Ø125mm 3-jaw chuck with 6mm scroll pitch and would like to
be able to mill my own soft jaws.

This sounds interesting, and harder than you might think.

At first I thought it was just a set of curves at various radii, and
to an extent it is, but the centre moves.
In fact the curves are not constant-radius, but are probably close
enough for practical purposes.

Also, each jaw is different. Whether you handle this in the G-code or
with an alternate workpiece placement is another question.

The parts are easy to model in CAD. It might actually be easier to do
it that way and then CAM.
 Hmm, the parts are not trivial to model in CAD.
https://www.youtube.com/watch?v=EYBiWhxgHTo

(You could model a scroll, then intersect it with the three jaw
sections, then CAM each seperately.)

In parametric G-code I would suggest that the answer is to start with
the nominal mid-point of each inner and outer thread flank
(separately)

Then calculate how far the two edges of the jaw offset from that
nominal mid-point

No, wait, all this is utterly wrong!

Either of these approaches will lead to a jaw that is a perfect fit in
exactly one position and will bind in any other position.

The outer flanks want to be machined to be at least as small a radius
as the smallest part of the scroll that they can touch.
The inner flanks want to be the same radius as the absolute max of the
scroll radius.


Correct, determining the radii of the inner arc and the outer arc, then
step the center of the 2 fixed length arcs across the inner face of the
jaw. It might take a pretty small mill to plow that, and if the jaws are
wide, it might take a 3rd pass to clear the center of the cut at the
edge of the jaw. My guess is that not, a 125mm scroll with a 6mm step.
I'd cut a phenolic test piece to determine the near side/far side
diameter of the tool, then add another thou for tool flex when cutting
the metal. You should be able to use a 3mm tool as the narrowest part of
the groove is at the centerline of the jaw.

Put an offset of 2mm for the second jaw, and 4mm for the third.

That ought to boil down to less than 50 LOC unless I'm missing something.

One might need, because the scroll has a small slant, want to offset the
center point of the arc in order to more accurately place the actual
scroll to jaw contact point at the center of the jaw. That visualizes to
a 3mm offset from the centerline of the jaw for the arcs "anchor" point,
I think.


I doubt that they are typically cut with any "slope" across the face.

Thats what I'm referring to above, by compensating for that slope, the
jaw to scroll contact would be centered on the bottom of the jaw,
resulting it a stronger "tooth" on the jaw.  And all that is, is a 3mm
movement of the center point of the arc sideways, trivial to do in
gcode.


They can only ever half line-contact with the scroll.






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[Emc-users] Scroll jaw G code?

[Bengt Sjölund]

Hi,
Looking for a g code generator for scroll jaws.
I have a Ø125mm 3-jaw chuck with 6mm scroll pitch and would like to be 
able to mill my own soft jaws.
Have bee searching the web but I can not find anything. Any help 
pointing me in right direction would be appreciated.


Cheers Bengt


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Re: [Emc-users] Possibly useful keyboards

[Bengt Sjölund]

You always have to temper the PLEXI after using cutting tools to get rid 
of 'tensions' built up by the cutting! This is a MUST DO !!!


Have been doing domes for underwater photography 30-40 years back and 
for sure all my domes where fixed with screws and appropriate washers.



/Bengt


Den 2018-08-03 kl. 18:01, skrev Dave Cole:

>>screws are forbidden

You just have to be careful.  Don't over tighten the screws.  Use 
washers, etc.
They make drills specifically for plexiglass.    The tip angles are 
different than standard drills.
You must drill plexiglass with a backer board.  If not the backside 
will breakout and fracture the edges which will leak to cracks.
However, gluing it is easier than screwing it together.  So unless it 
needs to be able to come apart, why not glue it.


At one time, plexiglass was a lot cheaper than lexan.  But I don't 
think there is much of a cost difference now.  Maybe 25% or so.
Lexan is much more impact resistant, so why not use that... Unless you 
have sheets of Plexiglass lying around.  :-)


Dave


On 8/2/2018 11:58 PM, Peter Blodow wrote:
Gentlemen, treating transparent plastic material is tricky, but not 
hard to do. For instance, in my company's shop we sometimes had to 
make covers (hoods) for scientific laboratory equipment. 
Polycarbonate, whatever its trade name may be (Macrolon in Germany), 
can be bent cold like sheet metal if not too thick.


Plexiglass (PMMA, polymethyl methacrylate) can be bent warm and glued 
with pure acetone or acetone with a little PMMA dissolved in it. 
Straighten the sheet sides with a mill, no slits or chinks are 
allowed. Screws are forbidden. We made ourselves thin heating rods in 
different lenghts which were placed beneath the bending line for 
several minutes, then bended by hand. Fixing the angle until cold is 
necessary. If more covers of same type are to be produced, deep 
drawing might be useful. Make a plywood fixture consisting of a flat 
plate and a second plate lying on top of it with a hole of the 
desired shape cut out, all inside covered with velvet foil to avoid 
scratches. Then hang the PMMA sheet in a 200° C heating cabinet until 
soft enough, quickly clamp it between the plywood plates and blow the 
sheet up with compressed air. We once made bowler hats this way for 
the public at an exhibition.


Peter




Am 02.08.2018 um 20:28 schrieb Gene Heskett:

On Thursday 02 August 2018 13:55:54 Dave Cole wrote:


On 8/2/2018 1:32 PM, Gene Heskett wrote:

On Thursday 02 August 2018 12:37:36 Dave Cole wrote:

Why not put a standard keyboard into a plexiglass box with an open
side towards the operator?

You can still see the keys if needed if you make it out of clear
plexi.   A sheet of 1/4" plexi, a table saw, and some plexi glue is
all you need.
When it gets scratched up, make another one, or buff it out.

Dave

Thats a thought. But I'd probably use the bullet proof stuff. I'll
see if theres glue for it next time I get to Lowes.

Thanks Dave.

Are you thinking of Lexan/Polycarbonate?

I know that Menards sells plastic glue but its in small quantities. I
suppose one could be screwed together if the plastic was thick enough.

I know that drilling Plexiglass can be tricky as it tends to
fracture/shatter if you are not careful.

I think that Lexan is more forgiving but more costly.


Thats the stuff, but couldn't recall the name, (oldtimers?) what I do
know is that it drills a lot like stainless. Perfectly sharp drills and
lots of pressure on them. I can't recall ever shattering it though.

It can be bent but takes a surprising amount of heat to soften it 
enough

to bend.

thanks Dave.


Dave






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[Emc-users] Odd size Grub Screw

[Bengt Sjölund]

Hi,

I have a friend who has an old machine and needs to get hold of grub/set 
screws UNF 9/16" with a length of 3/4" 20mm with hex or torx head.

Have been poking around for a while and cannot find any supplier.

Do you guys in UK have any secret supplier that can help out with this? 
10-15 pcs would suffice a lifetime.


Cheers
Bengt


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Re: [Emc-users] 7i90 not listed in pnc

[Bengt Sjölund]

I have used ITR8307 succesfully.
http://www.93x57r.se/tecno-cnc/images/CNC3000/opto%20sp-speed%202.jpg
http://www.everlight.com/file/ProductFile/ITR8307.pdf


Den 2018-05-26 kl. 13:46, skrev andy pugh:

On 25 May 2018 at 13:47, jeremy youngs  wrote:


I have no idea what it is, I may just find out today .

It definitely looks like an Optek logo, part number and date code

https://uk.rs-online.com/web/p/reflective-optical-sensors/6424301/





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Re: [Emc-users] More on er-20 stuffs

[Bengt Sjölund]

Why not go for a proper tool?

https://www.aliexpress.com/item/J41-Tapping-chuck-J4124-R8/32434340752.html

Cheers

Bengt


Den 2018-05-10 kl. 15:19, skrev Gene Heskett:

On Thursday 10 May 2018 08:02:57 andy pugh wrote:


On 10 May 2018 at 12:22, Gene Heskett  wrote:

This would, if a 3/4" R8 collet could be found with a D shaped bore,
be yet another way to remove one potential slip point in trying to
hold a tap for rigid tapping.

Buy a small-bore R8 collet and have it wire spark-eroded to a D-shape,
perhaps?

(You could consider plunge-eroding it yourself, I suppose)

Shirley, you jest. ;-)  Yes, I could do it, but how would one go about
maintaining the concentricity in a home shop environment? Sounds fairly
impossible to me. With what I have for a psu, and the lack of suitable
pumping to keep the fluid clean enough to work well, it would take quite
some time to remove that much metal from 300 degrees of a bore. On that,
unless we can tie the feed into the achieved spark rate, and profile the
electrode movement to compensate for electrode wear...  lots of ellipses
there, not to mention days of runtime. I think I'll pass.





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Re: [Emc-users] Mesa choices

[Bengt Sjölund]

https://forum.linuxcnc.org/54-user-exchange/32824-mesa-parts-4-sale

Have some Mesa boards for sale.

Cheers
Bengt


Den 2018-04-17 kl. 09:33, skrev Gene Heskett:

On Monday 16 April 2018 23:41:51 jeremy youngs wrote:


I'm controlling+-10 v carotron rcp 205-000 DC brush drive 25 amps,
igbt isolated. At 180v .
So from mulling this over , I think the 5i90 seems my best choice .

There is not a 5i90, perhaps you mean the 7i90HD? With that, you'll need
3 each of the 7i42TA's to give the 7i90 surge protection, and you some
easy to connect to terminal strips. This is what I'm using on the 11x
Sheldon.

I
still yet have to get coming a USB wifi adapter , but work in the shop
has been steady so time for this project is whenever I can. But I have
money so I'll buy parts. Seems it's always time or money , but I've
made a lot of progress on it in the last few months.
Thank you

What are you going to use to run LinuxCNC on?




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Re: [Emc-users] Forum down?

[Bengt Sjölund]

Thanks for the update.

Hope you can find a solution to this annoying problem.
Keep up the fine work that is much appreciated.

Cheers
Bengt


Den 2017-05-24 kl. 22:48, skrev Sebastian Kuzminsky:
> On 05/24/2017 02:20 PM, Bengt Sjölund wrote:
>> And again forum is down, what is going on?
>>
>> Anybody having insight in what is happening?
>>
>>
>> Cheers
>>
>> Bengt
> The forum currently works for me.
>
> We've been monitoring the forum more closely lately, to try to track
> down the flakiness.  It seems to be caused by periods of
> higher-than-usual load on the machine that serves the forum.
>
> I see in the logs that there was a period of high web activity, starting
> about 15:09 EDT and ending just recently, at 16:40 EDT.  During that
> time the machine exhausted its 1 GB of RAM and went 2 GB into swap,
> which causes very high latency.  If this was a CNC machine it would have
> E-stopped with a following error.
>
> Debugging continues...
>
>


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Re: [Emc-users] Forum down?

[Bengt Sjölund]

And again forum is down, what is going on?

Anybody having insight in what is happening?


Cheers

Bengt


Den 2017-05-10 kl. 08:50, skrev Bengt Sjölund:
> And down again.
>
> Cheers
> Bengt
>
>
> Den 2017-05-09 kl. 15:58, skrev John Thornton:
>> I had to power cycle it this morning around 5am central time.
>>
>> JT
>>
>>
>> On 5/9/2017 7:24 AM, Sebastian Kuzminsky wrote:
>>> It's up from here.
>>>
>>> http://isup.me/forum.linuxcnc.org
>>>
>>>
>>> On May 9, 2017 1:49:45 AM MDT, "Bengt Sjölund" <beng...@tecno.se> wrote:
>>>> And down again!
>>>>
>>>> What is it with the forum that goes down very often?
>>>>
>>>> Cheers
>>>> Bengt
>>>>
>>>>
>>>> Den 2017-04-30 kl. 19:58, skrev Jon Elson:
>>>>> On 04/29/2017 04:26 PM, Jon Elson wrote:
>>>>> And, it seems to be back up!
>>>>>
>>>>>   Thanks,
>>>>>
>>>>> Jon
>>>>>
>>>>>
>>>> --
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Re: [Emc-users] Forum down?

[Bengt Sjölund]

And down again.

Cheers
Bengt


Den 2017-05-09 kl. 15:58, skrev John Thornton:
> I had to power cycle it this morning around 5am central time.
>
> JT
>
>
> On 5/9/2017 7:24 AM, Sebastian Kuzminsky wrote:
>> It's up from here.
>>
>> http://isup.me/forum.linuxcnc.org
>>
>>
>> On May 9, 2017 1:49:45 AM MDT, "Bengt Sjölund" <beng...@tecno.se> wrote:
>>> And down again!
>>>
>>> What is it with the forum that goes down very often?
>>>
>>> Cheers
>>> Bengt
>>>
>>>
>>> Den 2017-04-30 kl. 19:58, skrev Jon Elson:
>>>> On 04/29/2017 04:26 PM, Jon Elson wrote:
>>>> And, it seems to be back up!
>>>>
>>>>  Thanks,
>>>>
>>>> Jon
>>>>
>>>>
>>> --
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Re: [Emc-users] Forum down?

[Bengt Sjölund]

And down again!

What is it with the forum that goes down very often?

Cheers
Bengt


Den 2017-04-30 kl. 19:58, skrev Jon Elson:
> On 04/29/2017 04:26 PM, Jon Elson wrote:
> And, it seems to be back up!
>
>Thanks,
>
> Jon
>
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Re: [Emc-users] Something is sure odd, traffic is VERY SLOW

[Bengt Sjölund]

Noticed that too Gene,

List is slow and forum is down.

Cheers
Bengt


Den 2017-04-30 kl. 14:11, skrev Gene Heskett:
> Greetings folks;
>
> I'm getting about 5% of the usual traffic since early Friday afternoon.
> On any of the 40 or so lists I am subscribed to. At 8AM, 4 unread
> messages since about 20:00 last night.  Not counting the 10 or so
> messages from the system that it did this or that with the usual
> results.
>
> And no one has announced they are going fishing...
>
> Cheers, Gene Heskett


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Re: [Emc-users] Forum down?

[Bengt Sjölund]

Is it maybe so that the forum has been attacked by spam robots?

The Swedish elektronikforumet.com was attacked earlier this week by 2 
robots and managed
to spit out garbage messages every 10 seconds for couple of hours before 
sysadmin got hold of this.

I sincerely hope that this is not the case as it is a lot of work to put 
things right again.

Experiencing increased spam mail also to my private accounts last few days.


Cheers
Bengt



Den 2017-04-29 kl. 23:26, skrev Jon Elson:
> On 04/29/2017 03:40 PM, andy pugh wrote:
>> On 29 April 2017 at 21:24, Bengt Sjölund <beng...@tecno.se> wrote:
>>> unable to log since afternoon local time
>> http://downforeveryoneorjustme.com/forum.linuxcnc.org
>>
>> I also can't get in.
>>
> Ah, yes, the FORUM is down, the rest of the web site is up.
>
> Jon
>
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Re: [Emc-users] Forum down?

[Bengt Sjölund]

unable to log since afternoon local time


Den 2017-04-29 kl. 20:29, skrev Nicklas Karlsson:
> No it seems to be alive. I work on some software to dump data from the drive 
> and import into Octave so I could measure parameters but have not reason to 
> post anything yet.
>
>
>
> On Sat, 29 Apr 2017 18:19:30 +0200
> Bengt Sjölund <beng...@tecno.se> wrote:
>
>> Hmmm. have you done it again ;-)
>>
>> Cheers
>> Bengt
>>
>>
>> Den 2017-04-20 kl. 14:11, skrev Kurt Jacobson:
>>> I have only posted on the forum twice, and each time it has gone down
>>> shortly thereafter. The only reasonable conclusion is that I break the
>>> forum ;)
>>>
>>> Cheers,
>>> Kurt
>>>
>>> On Thu, Apr 20, 2017 at 7:33 AM, giorgio foga <giorgiof...@hotmail.it>
>>> wrote:
>>>
>>>> Some forum it has "donate" button .. In this way it is possible to fund a
>>>> more stable server service, especially in the case of sites with a lot of
>>>> memory consumption ... 2USD of annual donation is nothing to worry about
>>>> getting everyone in touch ... but it is not my intention to oppose Nobody
>>>> with this proposal.
>>>>
>>>>
>>>> regards
>>>>
>>>> giorgio
>>>>
>>>>
>>>> 
>>>> Da: Bengt Sjölund <beng...@tecno.se>
>>>> Inviato: giovedì 20 aprile 2017 12.35
>>>> A: Enhanced Machine Controller (EMC)
>>>> Oggetto: [Emc-users] Forum down?
>>>>
>>>> Forum down, anybody know what has happened?
>>>>
>>>> Cheers
>>>> Bengt
>>>>
>>>>
>>>> 
>>>> --
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>>>> listinfo/emc-users>
>>>> lists.sourceforge.net
>>>> This list is for users of the Enhanced Machine Controller (EMC). Topics
>>>> include how to obtain, install, configure, and use EMC, as well as other
>>>> general EMC related ...
>>>>
>>>>
>>>> 
>>>> --
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Re: [Emc-users] Forum down?

[Bengt Sjölund]

Hmmm. have you done it again ;-)

Cheers
Bengt


Den 2017-04-20 kl. 14:11, skrev Kurt Jacobson:
> I have only posted on the forum twice, and each time it has gone down
> shortly thereafter. The only reasonable conclusion is that I break the
> forum ;)
>
> Cheers,
> Kurt
>
> On Thu, Apr 20, 2017 at 7:33 AM, giorgio foga <giorgiof...@hotmail.it>
> wrote:
>
>> Some forum it has "donate" button .. In this way it is possible to fund a
>> more stable server service, especially in the case of sites with a lot of
>> memory consumption ... 2USD of annual donation is nothing to worry about
>> getting everyone in touch ... but it is not my intention to oppose Nobody
>> with this proposal.
>>
>>
>> regards
>>
>> giorgio
>>
>>
>> 
>> Da: Bengt Sjölund <beng...@tecno.se>
>> Inviato: giovedì 20 aprile 2017 12.35
>> A: Enhanced Machine Controller (EMC)
>> Oggetto: [Emc-users] Forum down?
>>
>> Forum down, anybody know what has happened?
>>
>> Cheers
>> Bengt
>>
>>
>> 
>> --
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>> listinfo/emc-users>
>> lists.sourceforge.net
>> This list is for users of the Enhanced Machine Controller (EMC). Topics
>> include how to obtain, install, configure, and use EMC, as well as other
>> general EMC related ...
>>
>>
>> 
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Re: [Emc-users] Whats a good visual displayer for a dxf?

[Bengt Sjölund]

https://www.google.se/search?q=dxf+viwer=dxf+viwer=chrome..69i57j0l5.4328j0j8=chrome=UTF-8#q=dxf+viewer&*



Den 2017-02-23 kl. 19:05, skrev Gene Heskett:
> I am not familiar with this format. And synaptics search only finds a
> library. No clue what editor/viewer uses it. clicking on it offers to
> open it with geany but it displays the text only as text.
>
> Cheers, Gene Heskett


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Re: [Emc-users] OT: What Is It?

[Bengt Sjölund]

Sparkgaps


Den 2017-02-17 kl. 19:17, skrev Kirk Wallace:
> I know what it is, but while cruising through my pictures I got the
> notion that these look like a "What Is It" kind of thing. I thought I'd
> post them just for fun.
>
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6901.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6906.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/dcp_6903.jpg
> http://www.wallacecompany.com/machine_shop/Hobart_Cyber-TIG/
>


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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

Jon, you do all op in one shot!

It mills the hole and cuts the thread in a helical motion with feed rate 
to suite material.

Works very well as intended in recommended materials, done some 
threading in steel but in pre-drilled holes with this tool.


/Bengt


Den 2017-02-04 kl. 03:57, skrev Jon Elson:
> On 02/03/2017 11:23 AM, Bengt Sjölund wrote:
>> Take a moment and think again ;)  It is a single row tool.
>> /Bengt
>>
>>
>> Den 2017-02-03 kl. 18:05, skrev Jon Elson:
>>> tool into a chunk of material at the thread pitch feedrate.
> OK, you drill it down the center of the hole at a slow feed,
> and the thread milling teeth open the diameter up quite a
> bit more than the shank diameter.  Then, you deflect to the
> side and thread mill coming back up.  I've never run into a
> tool of this type before. I've used single-row thread mills,
> and use combo drill-taps a lot. Always something new!
>
> Jon
>
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

Take a moment and think again ;)  It is a single row tool.
/Bengt


Den 2017-02-03 kl. 18:05, skrev Jon Elson:
> tool into a chunk of material at the thread pitch feedrate.


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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

Not OK for bottom threaded holes ;)
/Bengt


Den 2017-02-03 kl. 14:25, skrev TJoseph Powderly:
> well its a lot more than the old draps and dreamers
> http://www.dreamertool.com/drapreg.html
>
> tomp tjtr33


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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

https://shop.vhf.de/catalogs/Thread-cutters-W_GW.htm

https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm

I am very fond of the one above = 2 tools in 1

Cheers
Bengt


Den 2017-02-03 kl. 12:46, skrev Valerio Bellizzomi:
> On Fri, 2017-02-03 at 11:28 +, andy pugh wrote:
>> On 3 February 2017 at 11:19, Valerio Bellizzomi  wrote:
>>> With this interpolated motion there is no need for spindle reversal when
>>> tapping
>> Yes, but, unless there is something very clever going on in those
>> animations, you need a cutting tool with zero lead.
>> I am about 80% convinced that you can#t do it with a standard tap.
>>
>>
>>
>
> It needs a special tool
>
> http://www.infodelta.it/foto/Filettatura%20interpolata.jpg
>
>
>
>
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Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

[Bengt Sjölund]

Anybody interested, I have one Renishaw MI 14 MK3  for sale/trade. 
Condition unknown, was included in a package deal years ago.
Labeled: This a MK3 MI 14 use only with a MK3 RMP

Located in Sweden

Cheers
Bengt


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Re: [Emc-users] Lathe limit puzzle

[Bengt Sjölund]

http://93x57r.se/tecno-cnc/documents/CNC3000/Blomqvist-S%20CNC%20page4.pdf

This how it is done on my Lathe.

Fixed Limit at the far end from chuck, adjustable Home and movable Limit 
closest to chuck.
1 switch NC handles Limit and Home.

Bengt


Den 2016-05-07 kl. 18:43, skrev Dave Caroline:
> It mostly gets in the way so is usually off the bed.
>
> Dave
>
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Re: [Emc-users] PCB circuit board drill file

[Bengt Sjölund]

If you have proper EXCELLON drillfile format cut and paste that code in 
left column, after that see to it that you have correct input parameters 
for the EXCELLON file and then GENERATE G-CODE.

There are NO C chars in the generated G-code

/Bengt

Den 2016-04-25 kl. 20:11, skrev Nicklas Karlsson:
> On Mon, 25 Apr 2016 19:58:47 +0200
> Bengt Sjölund <beng...@tecno.se> wrote:
>
>> http://eng-serve.com/cnc/excellon_gcode.html
> Tried it and linuxcnc make complain about the "C" character on the first T 
> line.
>
> I have been able to build my own CNC machine but this is the first time I use 
> g-code. I simply can't find what C character on the T line should do.
>
>
> Regards Nicklas Karlsson
>
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Re: [Emc-users] PCB circuit board drill file

[Bengt Sjölund]

http://eng-serve.com/cnc/excellon_gcode.html

Den 2016-04-25 kl. 19:54, skrev Nicklas Karlsson:
> I get problem with tool table setup. I have to comment out "INCH" and are not 
> able to figure out the T commandd.
>
> M48
> INCH
> T73 C0.020
> T72 C0.058
> T71 C0.030
> T70 C0.210
> T69 C0.036
> T68 C0.050
> T67 C0.038
> T66 C0.040
> T65 C0.068
>
>
>> On 25 April 2016 at 17:56, Nicklas Karlsson
>>  wrote:
>>> Do anyone have any suggestions on how to attack it?
>> An input filter than replaces Tn with
>>
>> M6 Tn
>> G81 F50 R0.5 Z-3
>>
>> Then the X Y coordinate pairs will drill holes.
>>
>> -- 
>> 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] Lubrication, (Slideway wear)

[Bengt Sjölund]

  Do you happen to know how if wear are a common problem for slideways and 
proper lubrication is important to avoid wear?


oil should be oozing out from slideways, if not old oil can be clogged 
in the oil lines.

Cheers
Bengt

Den 2016-04-25 kl. 17:14, skrev Nicklas Karlsson:
> On Mon, 25 Apr 2016 15:43:16 +0100
> andy pugh  wrote:
>
>> On 25 April 2016 at 15:37, Nicklas Karlsson
>>  wrote:
>>> Yes these kind of bearing or whatever it is called used to move spindle or 
>>> table in CNC machines. High friction I will discover although then high 
>>> wear is discovered it is a little bit late.
>> For that application you want "slideway lubricant"
>> http://www.alexoil.co.uk/industrial-gear-and-slideway-lubricants_c80.aspx
>> for example
> Yes then I know the name it become easier. Do you happen to know how if wear 
> are a common problem for slideways and proper lubrication is important to 
> avoid wear?
>
> I have table top engraver with nipples and real machine with some kind of 
> centralized system. It is good to know what happen is lubrication is not good 
> enough. Increased friction will increase current in servo motors so if this 
> is common a meter for used current in servo motors would be good. I however 
> increased wear is a problem lubrication must be checked manually at regular 
> intervals.
>
>
> Nicklas Karlsson
>
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Re: [Emc-users] Copying G code files from PC to PC

[Bengt Sjölund]

Why not just use a memory stick?

Cheers
Bengt

Den 2016-03-24 kl. 17:53, skrev Craig Warnol:
> Not an answer to your permissions issue, but here is my solution for
> copying G code between PCs.
>
> I set up an ownCloud (https://owncloud.org/) instance on my
> server/primary desktop/workstation and run the client on my other
> machines. There is a CNC directory that is automatically synchronized
> across all my systems. This gives the added benefit of automatic
> replication, so all files are on all systems. No manual copying needed.
> Also, it keeps track of changes, so you can go back and get an older
> version of the file. Works like Dropbox, but it doesn't leave my network.
>
> Craig
>
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Re: [Emc-users] junk Drill chuck from Grizzly

[Bengt Sjölund]

Or look for RÖHM

Den 2016-03-02 kl. 11:03, skrev andy pugh:
> On 2 March 2016 at 02:22, Gene Heskett  wrote:
>> Prowling catalogs on the net tonight I can across an import 3-JT that
>> sounds usable, page 479 on Enco's online catalog, #290-1515 for a red
>> one under $65.  Plus ship I assume.
> Try prowling eBay for a second-hand Albrecht.
>


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Re: [Emc-users] Rigid tapping speed advice

[Bengt Sjölund]

Both yes and no depending of tool you have.

I use these from 
https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm
Easy to do flat bottom threaded holes.

Bengt

Den 2016-01-23 kl. 21:43, skrev Jon Elson:
> On 01/23/2016 02:27 AM, Gene Heskett wrote:
>> I would appreciate a PM'd copy of that, "just in case".
> It is online, at http://pico-systems.com/gcode.html
>
> Look near the bottom for "Thread Milling".  You need to bore
> the hole to about the minor diameter of the thread first.
>
> Jon
>
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Re: [Emc-users] Rigid tapping speed advice

[Bengt Sjölund]

M12, why bother with tapping? Go for single point and no power issues 
like with tapping.
Cheers
Bengt

Den 2016-01-22 kl. 19:12, skrev Sarah Armstrong:
> Horsepower is you biggest enemy here , you need as much as you can get .
>
> On 22 January 2016 at 17:58, Gene Heskett  wrote:
>
>> On Friday 22 January 2016 12:43:35 tom-...@bgp.nu wrote:
>>
>>> This is the tap I am using:
>>> http://www.mscdirect.com/product/details/58607482?rItem=58607482 The
>>> drill I am using is 10.5mm which is 0.875 of 12mm so I would say that
>>> seems fairly large.  The OSG online tool recommends a 27/64” (10.7mm)
>>> drill, so I am very close (0.008” difference).  Also, if I was using
>>> OSG's tap they recommend 23.8764 IPM which equates to a spindle speed
>>> of 400 RPM.  I can try that (I used 300 RPM), but I suspect I am going
>>> to have the same (torque) issue I had before.  And perhaps the answer
>>> is I just don’t have enough torque at low spindle speeds to do it in
>>> one pass…
>>>
>>> -Tom
>> Spinning a 12mm tap in my G0704, in low backgear, will likely require a
>> not more than 1/4 turn deeper per peck cycle. Its only a 1 horse.
>>
>> A 10mm tap made it do some serious belly dragging, but did get it done at
>> a turn per peck.  It also did a 3/8 USS tap into a slightly undersized
>> hole in a white ash jig base, but I used all the tap, at about a turn
>> per peck.  Made great threads in the wood, and for a change, the studs
>> stood dead straight up!
>>
 On Jan 22, 2016, at 12:00 PM, John Thornton  wrote:

 What kind of tap did you use? I use only ElectroLube coated taps
 from OSG. OSG has an online tool to select the correct tap and drill
 for each job. I once had to deep hole tap in some 7075 and my normal
 taps broke off. I used the tool and got the right tap and drill so
 the hole size was correct for the job. Tapping charts usually use
 75% thread depth which is usually OK for a depth = diameter, for
 deeper depths you need a bigger hole.

 JT
>>> --
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>>
>> Cheers, Gene Heskett
>> --
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>>   soap, ballot, jury, and ammo. Please use in that order."
>> -Ed Howdershelt (Author)
>> Genes Web page 
>>
>>
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>
>


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Re: [Emc-users] Probe

[Bengt Sjölund]

I got some probes for sale at 
http://forum.linuxcnc.org/forum/54-user-exchange/29826-some-cnc-related-parts-4-sale

Accepting reasonable offers ;)

Cheers
Bengt

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[Emc-users] Password issues

[Bengt Sjölund]

Hi,

I am new to this with LinuxCNC and just dowloaded latest ISO, do install 
OK but cannot login = get message = wrong password.

Tried install in Swedish and US = same problems.


Have since long time ago Ubuntu 10.04 /2.5.0 with dual boot W7 + Mach3 
and it works in this PC so I decided to install directly to SSD.
Comes to login windows and then = wrong password. Believe me I have 
tried several different PW's and still no dice.

So can somebody tell me what I am doing wrong with this straight forward 
install of 2.7


By the way I can not upgrade my old Ubuntu 10.04, update manager fails. 
Any hints on what to do?
The dualboot is a must as I need Mach3 to function until I get LinuxCNC 
working. 7i90HD + 7i48 are the boards I have for lathe Z/X+Spindle all 
servos.


Cheers from Sweden
Bengt

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Re: [Emc-users] Password issues

[Bengt Sjölund]

Tuché

This how it works in W7 = only PW ( hard to learn old dogs to sit ;) )

And I have been barking like hell all evening, burning several DVD's etc

Cheers
Bengt


Den 2015-10-21 kl. 22:20, skrev andy pugh:
> On 21 October 2015 at 20:58, Bengt Sjölund <beng...@tecno.se> wrote:
>> So can somebody tell me what I am doing wrong with this straight forward
>> install of 2.7
> Often the problem is typing the password at the username prompt. (I do
> this myself about 50% of the time)
>
>


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[Emc-users] 7i90HD + 7i48

[Bengt Sjölund]

Next questions,

How do I setup my Mesa Boards

7i90HD + 7i48

Cannot find these in pulldown menus


/Bengt


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