Re: [Emc-users] RFQ Response form. ; -) Re: Adjustable Kinnematics?

2013-06-02 Thread Gene Heskett
On Sunday 02 June 2013 05:00:02 Gregg Eshelman did opine:

 --- On Sat, 6/1/13, Gene Heskett ghesk...@wdtv.com wrote:
  This if it can be found again, and a fresh copy of that I'd
  love to post in my shop for the entertainment value.
  
  Cheers, Gene
 
 Found the version I did as an RTF from the HTML so I could print it
 without all the extra stuff the site had.
 
 http://partsbyemc.com/pub/RFQ_response.rtf
 
Thanks Gregg, first copy s/b on printer output tray now. :)  Any copyright 
issues?

Cheers, Gene
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Re: [Emc-users] BeagleBone + BeBoPr 3D Printing

2013-06-02 Thread Charles Steinkuehler
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 6/1/2013 7:20 PM, Ed Nisley wrote:
 On 06/01/2013 12:39 PM, Charles Steinkuehler wrote:
 I particularly like the acceleration control in LinuxCNC. It
 seems smoother than the Arduino code.
 
 At least on the Marlin firmware branch of the RepRap tree, the
 interrupt handler switches from one-step-per-interrupt to
 two/interrupt at 10 k step/s, then to four/interrupt at 20 k
 step/s, with abrupt step timing changes. These pictures show the
 step pulses to the X axis of my M2 during the ramp up to 450 mm/s
 at 5000 mm/s^2:
 
 https://www.dropbox.com/s/llrx2ik6vlq4ne9/X%20Axis%20450%20mm-s%2050%20mm%20-%20100%20us-div%2041.9%20ms%20dly.png

 
https://www.dropbox.com/s/z4w4mg6wklnhvpm/X%20Axis%20450%20mm-s%2050%20mm%20-%20200%20us-div%2019%20ms%20dly.png
 
 The top trace is the motor winding current, the bottom trace is the
 Step pulse from the Arduino to the driver chip. The pulse clusters
 on the right side show how a single interrupt produces multiple
 steps, with the *average* rate remaining constant. However, speeds
 over about 112 mm/s (on the M2, anyway) have irregularly spaced
 Step pulses.

I've captured some 'scope traces with the PRU doing a pretty good job
of generating a 40 KHz step rate (500 mm/s on my MendelMax), and
there's still some increase possible (on the PRU side, anyway...this
speed is a bit much for my printer currently).

Pics:
https://plus.google.com/106079792142766516843/posts/QXgP5ghn5Wf

Video:
http://www.youtube.com/watch?v=ZsjJOSWD2c8

- -- 
Charles Steinkuehler
char...@steinkuehler.net
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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Dave

I want to buy a pendant for use with a Bridgeport CNC mill I have 
converted to Linuxcnc.

I think I want an MPG with axes selection, but tell me if you disagree.

I don't want to make my own as I have way too much other work to do 
right now.  I am really looking for an off the shelf hardware solution.
If it requires some hal configuration, I am not worried about that.

What do you guys recommend?

If the pendant gets bumped, I don't want it fracture and fly apart, etc.

I've look at the CNC4PC pendants and I have looked at the pendants on Ebay.

How practical are USB joysticks for use as pendants on a milling machine?
If you are using a USB joystick as a pendant, which model are you using??

Thanks,

Dave

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[Emc-users] Set axis zero without homing

2013-06-02 Thread Bruce Klawiter
As well as running EMC2 I can us my mill manually. When using the mill manually 
I use the DRO in EMC2, how do I set each axis to zero without having to home 
the machine first. I get an error telling me It needs to be homed first.

Your help is greatly appreciated,
Bruce
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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Bruce Layne
I highly recommend the JogIt! pendant.  I bought four of them via a 
KickStarter campaign.  There's a Mach version and a LinuxCNC version.  
They're awesome.  I use the small Logitech K400 wireless keyboard and 
touchpad to load the program and I do everything else with the JogIt! 
pendant.  I could use the small K400 keyboard as a wireless pendant, but 
it's still a lot larger than the pendant and the JogIt! pendant has 
dedicated keys for everything.  It plugs into a USB port and is truly 
plug-n-play with LinuxCNC.

I know this sounds like a commercial, but I have no financial interest 
and am just a happy customer.  I have four, and I think I'm going to buy 
two more!

http://www.kickstarter.com/projects/1651082654/jog-it-open-source-controller-pendant-for-emc2-and



On 06/02/2013 03:16 PM, Dave wrote:
 I want to buy a pendant for use with a Bridgeport CNC mill I have
 converted to Linuxcnc.

 I think I want an MPG with axes selection, but tell me if you disagree.

 I don't want to make my own as I have way too much other work to do
 right now.  I am really looking for an off the shelf hardware solution.
 If it requires some hal configuration, I am not worried about that.

 What do you guys recommend?

 If the pendant gets bumped, I don't want it fracture and fly apart, etc.

 I've look at the CNC4PC pendants and I have looked at the pendants on Ebay.

 How practical are USB joysticks for use as pendants on a milling machine?
 If you are using a USB joystick as a pendant, which model are you using??

 Thanks,

 Dave


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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread sam sokolik
you really want a real jog wheel..(mpg)  Once you use one - you 
will  never want anything else...  (really - you do)  :)

sam

On 06/02/2013 02:34 PM, Bruce Layne wrote:
 I highly recommend the JogIt! pendant.  I bought four of them via a
 KickStarter campaign.  There's a Mach version and a LinuxCNC version.
 They're awesome.  I use the small Logitech K400 wireless keyboard and
 touchpad to load the program and I do everything else with the JogIt!
 pendant.  I could use the small K400 keyboard as a wireless pendant, but
 it's still a lot larger than the pendant and the JogIt! pendant has
 dedicated keys for everything.  It plugs into a USB port and is truly
 plug-n-play with LinuxCNC.

 I know this sounds like a commercial, but I have no financial interest
 and am just a happy customer.  I have four, and I think I'm going to buy
 two more!

 http://www.kickstarter.com/projects/1651082654/jog-it-open-source-controller-pendant-for-emc2-and



 On 06/02/2013 03:16 PM, Dave wrote:
 I want to buy a pendant for use with a Bridgeport CNC mill I have
 converted to Linuxcnc.

 I think I want an MPG with axes selection, but tell me if you disagree.

 I don't want to make my own as I have way too much other work to do
 right now.  I am really looking for an off the shelf hardware solution.
 If it requires some hal configuration, I am not worried about that.

 What do you guys recommend?

 If the pendant gets bumped, I don't want it fracture and fly apart, etc.

 I've look at the CNC4PC pendants and I have looked at the pendants on Ebay.

 How practical are USB joysticks for use as pendants on a milling machine?
 If you are using a USB joystick as a pendant, which model are you using??

 Thanks,

 Dave

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Re: [Emc-users] BeagleBone + BeBoPr 3D Printing

2013-06-02 Thread Karl Schmidt
With the improved speed, are you seeing improved surface finish on the plastic?

My intuition tells me that at higher speed - might put down thinner more 
consistent layers? that 
would result in a better model? - but I don't know.


Karl Schmidt  EMail k...@xtronics.com
Transtronics, Inc.  WEB 
http://secure.transtronics.com
3209 West 9th Street Ph (785) 841-3089
Lawrence, KS 66049  FAX (785) 841-0434

Truth is mighty and will prevail.
There is nothing wrong with this,
except that it ain't so.
--Mark Twain



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Re: [Emc-users] Set axis zero without homing

2013-06-02 Thread Michał Geszkiewicz
Hi

See NO_FORCE_HOMING
http://www.linuxcnc.org/docs/html/config/ini_config.html#sub:TRAJ-section

regards,
Michael



W dniu 02.06.2013 21:13, Bruce Klawiter pisze:
 As well as running EMC2 I can us my mill manually. When using the mill 
 manually I use the DRO in EMC2, how do I set each axis to zero without having 
 to home the machine first. I get an error telling me It needs to be homed 
 first.

 Your help is greatly appreciated,
 Bruce
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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Stephen Dubovsky
Haven't used it much but I have the CNC4PC MPG12.  Appears well made.  Im
pretty sure its the same as the ones on ebay at 1/2 the price (I didn't
know at the time.)  The difference between the 4 and 6 axis ones are the
pin in the selector switch is moved to allow more/less rotation.  So either
one could be converted to the other.  Im using the 5  6 'axis' as a feed
and spindle speed override.  The cable is fairly thick/heavy (trying to
pull it off the table if you just lay it somewhere non ferrous) but the
magnets are really strong.  It will stick to a vertical ferrous surface NO
problem.  I wired it into the mesa board and not a parallel port.  I would
buy another (but this time get it off ebay for less $)

Stephen


On Sun, Jun 2, 2013 at 3:16 PM, Dave e...@dc9.tzo.com wrote:


 I want to buy a pendant for use with a Bridgeport CNC mill I have
 converted to Linuxcnc.

 I think I want an MPG with axes selection, but tell me if you disagree.

 I don't want to make my own as I have way too much other work to do
 right now.  I am really looking for an off the shelf hardware solution.
 If it requires some hal configuration, I am not worried about that.

 What do you guys recommend?

 If the pendant gets bumped, I don't want it fracture and fly apart, etc.

 I've look at the CNC4PC pendants and I have looked at the pendants on Ebay.

 How practical are USB joysticks for use as pendants on a milling machine?
 If you are using a USB joystick as a pendant, which model are you using??

 Thanks,

 Dave


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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Erik Friesen
I use a universal xbox style gamepad with my cnc router.  The joysticks are
proportional, and I have three jog speeds set up on different buttons.
 Left joystick is XY and right is Z.  It is set up so that a second button
has to be pressed to enable jogging to prevent accidental jogging.  Is
there some equivalent safety feature on the Jog It! pendant?


On Sun, Jun 2, 2013 at 4:07 PM, Stephen Dubovsky smdubov...@gmail.comwrote:

 Haven't used it much but I have the CNC4PC MPG12.  Appears well made.  Im
 pretty sure its the same as the ones on ebay at 1/2 the price (I didn't
 know at the time.)  The difference between the 4 and 6 axis ones are the
 pin in the selector switch is moved to allow more/less rotation.  So either
 one could be converted to the other.  Im using the 5  6 'axis' as a feed
 and spindle speed override.  The cable is fairly thick/heavy (trying to
 pull it off the table if you just lay it somewhere non ferrous) but the
 magnets are really strong.  It will stick to a vertical ferrous surface NO
 problem.  I wired it into the mesa board and not a parallel port.  I would
 buy another (but this time get it off ebay for less $)

 Stephen


 On Sun, Jun 2, 2013 at 3:16 PM, Dave e...@dc9.tzo.com wrote:

 
  I want to buy a pendant for use with a Bridgeport CNC mill I have
  converted to Linuxcnc.
 
  I think I want an MPG with axes selection, but tell me if you disagree.
 
  I don't want to make my own as I have way too much other work to do
  right now.  I am really looking for an off the shelf hardware solution.
  If it requires some hal configuration, I am not worried about that.
 
  What do you guys recommend?
 
  If the pendant gets bumped, I don't want it fracture and fly apart, etc.
 
  I've look at the CNC4PC pendants and I have looked at the pendants on
 Ebay.
 
  How practical are USB joysticks for use as pendants on a milling machine?
  If you are using a USB joystick as a pendant, which model are you using??
 
  Thanks,
 
  Dave
 
 
 
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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Ed Nisley
On 06/02/2013 03:16 PM, Dave wrote:
 If you are using a USB joystick as a pendant, which model are you using??

At least for my Sherline, a Logitech Dual-Action gamepad works 
wonderfully well. Here's the initial description:

http://softsolder.com/2010/10/23/logitech-gamepad-as-emc2-pendant-eagle-schematics-for-the-joggy-thing/

It gives direct four-axis control: XY on the left, ZA on the right. The 
buttons along the top provide full-speed rapids and the joysticks go 
down to crawling speeds.

The HAL circuitry detects which joystick axis starts moving and locks 
out all the others, which prevents inadvertent motion along an axis that 
you've already lined up against an edge. The buttons don't have that 
lockout, so you can slew diagonally at high speed when that's appropriate.

More HAL wiring uses two of the four buttons on the cable side as an 
E-stop button: you must push both buttons to trigger the stop. Agreed, 
software should be in the E-stop loop, but this is a Sherline... and I 
haven't ever used those buttons, come to think of it, because shutting 
off the power to the motor driver box works even better.

 How practical are USB joysticks for use as pendants on a milling machine?

Probably not very, at least on a real milling machine that's spraying 
coolants and hot chips and piles of swarf all over. On the other hand, 
gamepads are cheap and easily replaceable, so you don't form a deep 
emotional attachment to them...

-- 
Ed
softsolder.com

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Re: [Emc-users] BeagleBone + BeBoPr 3D Printing

2013-06-02 Thread Ed Nisley
On 06/02/2013 03:50 PM, Karl Schmidt wrote:
 improved surface finish

Not really. The slicing software adjusts the extrusion speed to match 
the XY speed, so the printer lays down a consistent amount of plastic no 
matter what speed you choose.

That's the theory. In practice (and for my setup), higher speeds produce 
worse results. I think part of the problem is that the extruder must 
paste the current molten thread onto the previous layer, which requires 
enough dwell time to melt them firmly together; higher speeds work 
against that, so things don't stick nearly as well.

On the other hand, faster non-printing moves reduce the amount of time 
the printer spends *not* printing, which is generally a Good Thing... 
until something shakes loose.

-- 
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softsolder.com

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Gene Heskett
On Sunday 02 June 2013 17:28:20 Dave did opine:

 I want to buy a pendant for use with a Bridgeport CNC mill I have
 converted to Linuxcnc.
 
 I think I want an MPG with axes selection, but tell me if you disagree.
 
 I don't want to make my own as I have way too much other work to do
 right now.  I am really looking for an off the shelf hardware solution.
 If it requires some hal configuration, I am not worried about that.
 
 What do you guys recommend?
 
 If the pendant gets bumped, I don't want it fracture and fly apart, etc.
 
 I've look at the CNC4PC pendants and I have looked at the pendants on
 Ebay.
 
 How practical are USB joysticks for use as pendants on a milling
 machine? If you are using a USB joystick as a pendant, which model are
 you using??
 
 Thanks,
 
 Dave

I had a Saitek configured to run mine with, but it turned out to be useless 
because they have no position feedback, so you don't know when you are off 
centered and moving another axis when you THINK you are only moving one 
axis.  Possibly some other brand might give you a 'fence' you would have to 
overcome that would prevent moving an axis you didn't want to move, but the 
highly thought of Saitek isn't it.  I have many of the parts to cobble up a 
box with 4 encoders on it, derived from some 24 volt mini steppers driving 
comparators, one for each axis, but they are all still in the box.  
Interfacing that would of course require all of a 2nd parport on a 4 axis 
machine.  I lost my round tuit.
 
 
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Cheers, Gene
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 soap, ballot, jury, and ammo. Please use in that order.
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My web page: http://coyoteden.dyndns-free.com:85/gene is up!
My views 
http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml
All new:
Parts not interchangeable with previous model.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
 law-abiding citizens.

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Florian Rist
Hi,
I don't have a tested recomendation, but from time to time I'm looking
at these cheep wireless USB hand wheels:

  http://www.ebay.de/itm/170979265195
The only problem: it's wireless and I cant see how careful security
features were implemented (if at all). Each command sent from the
pendant should be echoed by the host and confirmed by the pendant. Ah,
and of course there are not Linux driver. But I guess the USB dongles is
a HID device, so it should not be too difficult.

See you
flo

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread andy pugh
On 2 June 2013 22:51, Florian Rist fr...@fs.tum.de wrote:

   http://www.ebay.de/itm/170979265195
  But I guess the USB dongles is
 a HID device, so it should not be too difficult.

Someone on the forum has one largely working with hal_input, but there
is as-yet no way to use the LCD.

I asked one of the manufacturers if they wanted to lend me one to
write a HAL driver, but they weren't interested.

The JogIt! is plug-and-play because it works entirely by keypress
emulation. This also means that you might not always be able to rely
on the key-up signal arriving when you expect.

My preference would be for an all-realtime pendant. The Mesa 7i73 is
the ideal thing for the interfacing, but is just a bare PCB so isn't
what the OP was after. It shouldn't be particularly difficult to put
one in one of these though: http://www.ebay.co.uk/itm/261182593565

-- 
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http://www.ifixit.com/Manifesto

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Re: [Emc-users] RFQ Response form. ; -) Re: Adjustable Kinnematics?

2013-06-02 Thread Gregg Eshelman
--- On Sun, 6/2/13, Gene Heskett ghesk...@wdtv.com wrote:

  Found the version I did as an RTF from the HTML so I
 could print it
  without all the extra stuff the site had.
  
  http://partsbyemc.com/pub/RFQ_response.rtf
  
 Thanks Gregg, first copy s/b on printer output tray now.
 :)  Any copyright issues?

Not that I know of.

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Re: [Emc-users] RFQ Response form. ; -) Re: Adjustable Kinnematics?

2013-06-02 Thread jeremy youngs
thanx greg i will post this to my boss , it should help alleviate some of
our issues :)



On Sun, Jun 2, 2013 at 7:39 PM, Gregg Eshelman g_ala...@yahoo.com wrote:

 --- On Sun, 6/2/13, Gene Heskett ghesk...@wdtv.com wrote:

   Found the version I did as an RTF from the HTML so I
  could print it
   without all the extra stuff the site had.
  
   http://partsbyemc.com/pub/RFQ_response.rtf
 
  Thanks Gregg, first copy s/b on printer output tray now.
  :)  Any copyright issues?

 Not that I know of.


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We conclude that the Second Amendment protects an individual right to keep
and bear arms. That right existed prior to the formation of the new
government under the Constitution and was premised on the private use of
arms for activities such as hunting and self-defense, the latter being
understood as resistance to either private lawlessness or the depredations
of a tyrannical government. - U.S. Court of Appeals, D.C. Circuit, March
9, 2007



jeremy youngs
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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Florian Rist
Hi Andy

 My preference would be for an all-realtime pendant. The Mesa 7i73 is
 the ideal thing for the interfacing, 

Thanks for the hint. This looks good and its cheep.

cu
Flo

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Re: [Emc-users] Set axis zero without homing

2013-06-02 Thread Jon Elson
Bruce Klawiter wrote:
 As well as running EMC2 I can us my mill manually. When using the mill 
 manually I use the DRO in EMC2, how do I set each axis to zero without having 
 to home the machine first. I get an error telling me It needs to be homed 
 first.
   
You can set it to home where it is, then home each axis aligned with a
visible mark.  But, automatic homing, even to simple switches is
really helpful.  It allows you to set the machine limits of travel, then
when you load a G-code program, it immediately tells you that
the program exceeds some axis at line # so and so.  This allows
you to reposition the part so it won't run out of travel in the middle
of the job.  Saved me time and materials a couple times when I
had the part too close to the edge.

Jon

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Jon Elson
Dave wrote:
 I've look at the CNC4PC pendants and I have looked at the pendants on Ebay.
   
I think the CNC4PC is a pretty good design, and should be reasonably robust.
I have basically duplicated the function of that unit myself.  The only 
change
I made was to reverse the polarity of the white button, so it is 
normally open.
This enabled the MPG when pushed.  When not pushed, the MPG has
no effect of the machine.  The only reason I made my own is the CNC4PC
is a bit expensive for what is in it.  I also added a diode encoder so I
could control 4 axes plus spindle override and feed override with only
3 wires to 3 digital inputs.  (Another 2 for the rate select switch.)

Jon

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread andy pugh
On 3 June 2013 01:18, Florian Rist fr...@fs.tum.de wrote:

  Mesa 7i73

 Thanks for the hint. This looks good and its cheep.

It is less cheap if you need an interface board for it, but if you
have the smart-serial port free on a 7i76 or 7i77 then it's perfect.

-- 
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Re: [Emc-users] RFQ Response form. ; -) Re: Adjustable Kinnematics?

2013-06-02 Thread Gene Heskett
On Sunday 02 June 2013 21:06:17 Gregg Eshelman did opine:
regg, first copy s/b on printer output tray now.
  
  :)  Any copyright issues?
 
 Not that I know of.
 
Goody  thanks for finding it for us.

Cheers, Gene
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 soap, ballot, jury, and ammo. Please use in that order.
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My views 
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dangerous than 200 million guns in the hands of
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Re: [Emc-users] BeagleBone + BeBoPr 3D Printing

2013-06-02 Thread Charles Steinkuehler
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

I've gotten enough of a response from my BeagleBone + LinuxCNC videos
that I've created a blog to track the progress and post answers to
questions so everyone can benefit (and I hopefully have less e-mail to
respond to!):

  http://bb-lcnc.blogspot.com/

...I'll still post here when I reach a major milestones, but check the
blog if you want to track intermediate progress.

- -- 
Charles Steinkuehler
char...@steinkuehler.net
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.11 (MingW32)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iEYEARECAAYFAlGr8Y0ACgkQLywbqEHdNFw93wCfaVVAwpbcz6aYo+8KRHvKiXqK
BnsAn1PJPdE0gGQnStjZ6cYSNZiC+3z4
=TzCD
-END PGP SIGNATURE-

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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Dave
Thanks everyone for the feedback.

I'm hesitant to do a USB interface with an MPG wheel so I think I will 
stick to an LPT port interface for this machine and give that a go.
That should be simple and reliable.

I ordered one of the CNC4PC like units off of Ebay.   $92 including 
shipping.

Dave





On 6/2/2013 6:34 PM, andy pugh wrote:
 On 2 June 2013 22:51, Florian Ristfr...@fs.tum.de  wrote:


http://www.ebay.de/itm/170979265195
   But I guess the USB dongles is
 a HID device, so it should not be too difficult.
  
 Someone on the forum has one largely working with hal_input, but there
 is as-yet no way to use the LCD.

 I asked one of the manufacturers if they wanted to lend me one to
 write a HAL driver, but they weren't interested.

 The JogIt! is plug-and-play because it works entirely by keypress
 emulation. This also means that you might not always be able to rely
 on the key-up signal arriving when you expect.

 My preference would be for an all-realtime pendant. The Mesa 7i73 is
 the ideal thing for the interfacing, but is just a bare PCB so isn't
 what the OP was after. It shouldn't be particularly difficult to put
 one in one of these though: http://www.ebay.co.uk/itm/261182593565




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Re: [Emc-users] Pendant recommendations

2013-06-02 Thread Marius Liebenberg
Jon
Do you care to elaborate on the diode encoder?

On 2013/06/03 02:42 AM, Jon Elson wrote:
 Dave wrote:
 I've look at the CNC4PC pendants and I have looked at the pendants on 
 Ebay.
 I think the CNC4PC is a pretty good design, and should be reasonably 
 robust.
 I have basically duplicated the function of that unit myself.  The 
 only change
 I made was to reverse the polarity of the white button, so it is 
 normally open.
 This enabled the MPG when pushed.  When not pushed, the MPG has
 no effect of the machine.  The only reason I made my own is the CNC4PC
 is a bit expensive for what is in it.  I also added a diode encoder so I
 could control 4 axes plus spindle override and feed override with only
 3 wires to 3 digital inputs.  (Another 2 for the rate select switch.)

 Jon



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MasterCut cc
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Tel: +27 12 743 6064
Fax: +27 86 551 8029
Skype: marius_d.liebenberg



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