Re: [Emc-users] First test run on 3D printed CNC conversion

[Jon Elson]

On Tue, Jun 23, 2020, 2:38 PM Chris Albertson 
 wrote:

I shot an iPhone video of the first test with all three axes assembled.


https://youtu.be/wupYP2NNsXI


That looks a bit like my X-2 hack (although mine isn't a 
real X-2, it is the same machine.)

See http://pico-systems.com/minimill.html   for some photos.

I found one big problem was the Y axis handle assembly did 
not have a ball bearing, but just a bronze sleeve and the 
handle jam nuts would slowly tighten up until the axis bound 
up.  The X has a pair of ball bearings with the handle nuts 
preloading them.  So, I cut the Y axis handle bracket to 
work the same way.

You can just barely see it in one of the pictures.

I used to use this machine for demos at shows, but there 
haven't been too many shows lately.
I also put a spindle encoder on it first, as it was a lot 
easier to do than on a Bridgeport.


Jon


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Re: [Emc-users] First test run on 3D printed CNC conversion

[andrew beck]

Just watched the video Chris.  It's awesome.  Good job.



On Tue, Jun 23, 2020, 2:38 PM Chris Albertson 
wrote:

> I shot an iPhone video of the first test with all three axes assembled.
> Again, this CNC build is purposely the simplest and lowest cost build I
> could do.  I'm still using two 3D printed timing belts and all printed
> parts. and the z-axis is held together with clamps.   But as you can see it
> can now "cut" the "LinuxCNC" splash screen.
>
> It will eventually have home and limit switches, Mesa card, and glass
> linear encoders but I want to characterize and document a low-budget build
> first.
>
> This is working out about as I wanted. The budget is still holding about
> $350.  It seems to perform well enough to be useful.  My computer has
> 37,000 ns of jitter so I've limited step rate to 8 kHz on all axes.  Even
> so, I get a very reliable 30 mm/second movement on both X and Y.   I should
> be able to be better because I have the drivers set to limit current to 2.0
> amps with 4.2 amp motors. I think I can improve the 35,000 number.
>
> I'm working on setting up a gamepad  ( target.com/p/logitech-f310-gamepad
>  )  as a
> pendant.  It is looking like I will be able to do jogs, toutch-offs, and
> some manual milling operations with this $20 "pendant".
>
> https://youtu.be/wupYP2NNsXI
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
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Re: [Emc-users] First test run on 3D printed CNC conversion

[andy pugh]

On Tue, 23 Jun 2020 at 22:36, Chris Albertson  wrote:

> > Have you found the Wiki page on that subject?
> > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_Remote_Pendant
>
> Thanks,  I found other hints but not that Wiki page.  It is good.I'm
> doing it slightly differently.   I did not want the machine to jog if the
> thumbstick is accidentally bumped.  So the triggers on the front are going
> to be speed controls.

I think that page suggests that, but using the back buttons? I used
one for a while and liked it. If neither left back button was pressed
then jogging was disabled. Then top was slow, bottom medium, and both
fast jog.

-- 
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


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Re: [Emc-users] First test run on 3D printed CNC conversion

[Chris Albertson]

On Tue, Jun 23, 2020 at 4:49 AM andy pugh  wrote:

> On Tue, 23 Jun 2020 at 03:38, Chris Albertson 
> wrote:
>
> Have you found the Wiki page on that subject?
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_Remote_Pendant


Thanks,  I found other hints but not that Wiki page.  It is good.I'm
doing it slightly differently.   I did not want the machine to jog if the
thumbstick is accidentally bumped.  So the triggers on the front are going
to be speed controls.  With no trigger pulled the speed is zero but with
full trigger the jog speed is "fast".   I expect to be able to feather the
trigger and move slowly or fast as needed.

I might update the Wiki, With Debian "Stretch" there is an "input" group
that solves permissions problem.  I few other things I found too.

I want to be able to do simple milling with no g-code, just runng Axis and
the gamepad.   This will have to evolve over time.

I need to figure out some way to make nice looking button labels for the
gamepad, but masking tape and a sharpie works.

If I ever do build my own pendant I'll make it a USB HID device and it will
work the same way.


>
>
>

-- 

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] First test run on 3D printed CNC conversion

[andy pugh]

On Tue, 23 Jun 2020 at 03:38, Chris Albertson  wrote:

> I'm working on setting up a gamepad  ( target.com/p/logitech-f310-gamepad
>  )  as a
> pendant.  It is looking like I will be able to do jogs, toutch-offs, and
> some manual milling operations with this $20 "pendant"

Have you found the Wiki page on that subject?
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_Remote_Pendant

-- 
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


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Re: [Emc-users] max motor size that a 8i20 can control

[andrew beck]

Yes I know Greg.  But they are not worried someone has bought the land for
houses and I think they got some serious money for it.  Like probably 40
million nzd.

So they just want it gone.

And I'm happy as to get it!

I paid 5k nzd which is about 3000usd so got it for a song.

Just got home tonight.

Now to crane it in tomorrow and then start the retro.  Might do the cnc
lathe first though.

Regards

Andrew

On Tue, Jun 23, 2020, 7:28 PM Gregg Eshelman via Emc-users <
emc-users@lists.sourceforge.net> wrote:

> They could have spent a whole lot less than that doing a LCNC refit.
>
> On Monday, June 22, 2020, 9:52:42 AM MDT, andrew beck <
> andrewbeck0...@gmail.com> wrote:
>  Marcus.  Nah that s just how it was.  It is a very low hr machine.  With a
> heidenhain control.  They spent 25k trying to fix the control and then
> asked me if I wanted to buy it
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Re: [Emc-users] max motor size that a 8i20 can control

[Gregg Eshelman via Emc-users]

They could have spent a whole lot less than that doing a LCNC refit.

On Monday, June 22, 2020, 9:52:42 AM MDT, andrew beck 
 wrote:  
 Marcus.  Nah that s just how it was.  It is a very low hr machine.  With a
heidenhain control.  They spent 25k trying to fix the control and then
asked me if I wanted to buy it  
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