Re: [Emc-users] Touch off in gcode

2010-02-28 Thread Jeff Epler
For the specific purpose of measured tool lengths, use G43.1 I- K-
dynamic tool compensation instead of coordinate system offsets.
http://linuxcnc.org/docs/2.3/html/gcode_main.html#sub:G43,-G49:-Tool

In v2.4 the gcode will be incompatibly changed because tool length
offsets can apply to all axes, not just X and Z or W.  The new code is
G43.1 X- Y- Z- ...  and the old I- K- will be rejected as an error.
http://linuxcnc.org/docs/2.3/html/gcode_main.html#sub:G43,-G49:-Tool

Jeff

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Re: [Emc-users] Linear Scales

2010-02-28 Thread BRIAN GLACKIN
Thanks for the replies.

Based on your comments, I am backing away from these for the time being.
Your comments led me to realize this is beyond my focus at this time.  While
I certainly could attack this project, family, travel and home renovations
are trumping my efforts at this time.

As an aside.  The three scales are all Mitutoyo, AT2 with 10, 17 and 36
lengths and are series 529.  These are certainly older scales since all I
could find information on Mitutoyo's were 539 series.  They guy has em
listed for $130 for all with mounting brackets and the like (no box
however).  The price seemed reasonable.

If anyone is interested in chasing them, search Reading PA craigslist and
Mitutoyo and they will pop up.  This is the second relisting (that I am
aware of) by the seller so its not like they are flying off the shelf.

Brian
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Re: [Emc-users] Linear Scales

2010-02-28 Thread Kirk Wallace
On Sun, 2010-02-28 at 12:36 -0500, BRIAN GLACKIN wrote:
... snip
 If anyone is interested in chasing them, search Reading PA craigslist and
 Mitutoyo and they will pop up.  This is the second relisting (that I am
 aware of) by the seller so its not like they are flying off the shelf.
 
 Brian

Thanks for sharing Brian. I think these could make someone with a manual
machine and a DRO very happy.

Just in case it might be handy to someone:
http://www.wallacecompany.com/machine_shop/EMC2/dro_vfd/

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] Touch off in gcode

2010-02-28 Thread Andy Pugh
On 27 February 2010 23:33, Frank Tkalcevic fr...@franksworkshop.com.au wrote:

 Can this be done in Gcode?  I can't see how to get the current machine
 position in gcode.

I found a clunky way to do it by using G92 X0 Z0 then reading the
offsets stored in #5211 and #5213.

This assumes you want the current relative (working) coordinates. If
the absolute coordinates are better then you can use G28.1 to store
the current position in #5161-#5166.

It might be possible to connect some HAL variables to a pair of
analogue input virtual pins to read them with M6. I haven't looked
into that as currently the G92 way works well enough for my purposes.

-- 
atp

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[Emc-users] (no subject)

2010-02-28 Thread Cathrine Hribar


Hi All:

I have a problem with my stepper driver board.  The board is made by 
Stepmaster. Board # SOP-1 ver. 1.2

I need steplen, stepspace, dirsetup, and dirhold.

Can't get steppers to be reliable faster than Max. Vol. .3

Anyone help?

Thanks:

Bill


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Re: [Emc-users] (no subject)

2010-02-28 Thread Kirk Wallace
On Sun, 2010-02-28 at 11:32 -0700, Cathrine Hribar wrote:
 Hi All:
 I have a problem with my stepper driver board.  The board is made by 
 Stepmaster. Board # SOP-1 ver. 1.2
 
 I need steplen, stepspace, dirsetup, and dirhold.
 Can't get steppers to be reliable faster than Max. Vol. .3
 
 Anyone help?
 Thanks:
 Bill

Googleing stepmasternc brought up some interesting links.

This one:
http://www.cnczone.com/forums/showthread.php?t=41957 

seems to indicate that the Alegro datasheet for the chip on your board
might shed some light on how to use the chip. There is a hint that you
may need a buffered break-out-board on your parallel port end of the
input cable, especially if you have a low voltage parallel port. You may
need to get creative to get this stepper controller/driver working well.
Posting some close up pictures of the board may help.

The board's datasheet:
http://www.machsupport.com/forum/index.php?action=dlattach;topic=1754.0;attach=1234
 

doesn't seem to help much.

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] Linear Scales

2010-02-28 Thread RogerN
- Original Message - 
From: BRIAN GLACKIN glackin.br...@gmail.com
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Sunday, February 28, 2010 11:36 AM
Subject: Re: [Emc-users] Linear Scales


 Thanks for the replies.

 Based on your comments, I am backing away from these for the time being.
 Your comments led me to realize this is beyond my focus at this time. 
 While
 I certainly could attack this project, family, travel and home renovations
 are trumping my efforts at this time.

 As an aside.  The three scales are all Mitutoyo, AT2 with 10, 17 and 36
 lengths and are series 529.  These are certainly older scales since all I
 could find information on Mitutoyo's were 539 series.  They guy has em
 listed for $130 for all with mounting brackets and the like (no box
 however).  The price seemed reasonable.

 If anyone is interested in chasing them, search Reading PA craigslist and
 Mitutoyo and they will pop up.  This is the second relisting (that I am
 aware of) by the seller so its not like they are flying off the shelf.

 Brian
 --

I have a CNC lathe and CNC mill that both use a setup like you are referring 
to.  It is set up so feedback from the servo motors themselves go to the 
servo amplifier, and the feedback from the linear scales goes to the CNC 
controller.  That way the servo motor to amplifier is stable independent of 
backlash between the motor and linear scale.  These were both Anilam 
systems, I converted the lathe to EMC2, plan to convert the mill some day.

Roger Neal
 


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[Emc-users] Magnetic Encoder

2010-02-28 Thread Kirk Wallace
Does anyone have a source for these?:
http://www.avagotech.com/docs/AV02-0188EN

Mouser wants to sell me 204 of these. Digikey says it's a non-stock
item.

One nice thing about these is the SPI like output.
-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] Magnetic Encoder

2010-02-28 Thread Flying Electron Inc
www.avnet.com looks like they sell the AEAT-6010 and AEAT-6012 in single
unit quantities.

Lawrence

On Sun, Feb 28, 2010 at 12:14 PM, Kirk Wallace
kwall...@wallacecompany.comwrote:

 Does anyone have a source for these?:
 http://www.avagotech.com/docs/AV02-0188EN

 Mouser wants to sell me 204 of these. Digikey says it's a non-stock
 item.

 One nice thing about these is the SPI like output.
 --
 Kirk Wallace
 http://www.wallacecompany.com/machine_shop/
 http://www.wallacecompany.com/E45/index.html
 California, USA



 --
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 proactively, and fine-tune applications for parallel performance.
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Re: [Emc-users] dwg to dxf converter Linux

2010-02-28 Thread Ormund Williams
On Sat, 2010-02-27 at 19:17 -0500, ad...@mmri.us wrote:
 CORRECTION: Ignore previous mail
 
 Any dwg to dxf converter for Linux available yet ?
 Qcad, graphite and Dia do not support dwg.
 
The only Linux program that I know of that opens dwg files is VariCAD
and only 2D, it will export a dxf.  VariCAD is not a free program.

Regards.

__
Ormund



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Re: [Emc-users] (no subject)

2010-02-28 Thread Gene Heskett
On Sunday 28 February 2010, Cathrine Hribar wrote:
Hi All:

I have a problem with my stepper driver board.  The board is made by
Stepmaster. Board # SOP-1 ver. 1.2

I need steplen, stepspace, dirsetup, and dirhold.

Can't get steppers to be reliable faster than Max. Vol. .3

The first link I found on Google doesn't bode well for making use of the 
device, it will not stand up to the music seems to be the general consensus 
of the postings I read on linuxcnc.  The Xylotex boards have far better 
support and are much more convenient to use as they have their own B.O.B.

I have 2 myself, abide by the rules and my machine can move 25 ipm with a 
27.5 volt supply.

They are I believe the same allegro chip used on the xylotex boards, but 
xylotex puts heat sinks on them and recommends plenty of air flow for full 
output.  And they Just Work(TM).

Anyone help?

Thanks:

Bill


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There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
-Ed Howdershelt (Author)

You're out of memory

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Re: [Emc-users] Magnetic Encoder

2010-02-28 Thread John Harris
All,
Be cautious about fitting magnetic encoders to the back of NEMA34 or 
larger step motors. The magnetic field in the area where the encoder is to 
be installed is strong enough to screw up the encoder readings.

The effect shows up as noise on the position reading.

John (The hard way)

- Original Message - 
From: Kirk Wallace kwall...@wallacecompany.com
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Sunday, February 28, 2010 1:14 PM
Subject: [Emc-users] Magnetic Encoder


 Does anyone have a source for these?:
 http://www.avagotech.com/docs/AV02-0188EN

 Mouser wants to sell me 204 of these. Digikey says it's a non-stock
 item.

 One nice thing about these is the SPI like output.
 -- 
 Kirk Wallace
 http://www.wallacecompany.com/machine_shop/
 http://www.wallacecompany.com/E45/index.html
 California, USA


 --
 Download Intel#174; Parallel Studio Eval
 Try the new software tools for yourself. Speed compiling, find bugs
 proactively, and fine-tune applications for parallel performance.
 See why Intel Parallel Studio got high marks during beta.
 http://p.sf.net/sfu/intel-sw-dev
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 Emc-users@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/emc-users
 


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Re: [Emc-users] Stepper controller setup

2010-02-28 Thread Cathrine Hribar



On Sun, 28 Feb 2010 16:23:48 -0500
  Gene Heskett gene.hesk...@gmail.com wrote:
 On Sunday 28 February 2010, Cathrine Hribar wrote:
Hi All:

I have a problem with my stepper driver board.  The board is made by
Stepmaster. Board # SOP-1 ver. 1.2

I need steplen, stepspace, dirsetup, and dirhold.

Can't get steppers to be reliable faster than Max. Vol. .3

 The first link I found on Google doesn't bode well for making use of the 
 device, it will not stand up to the music seems to be the general consensus 
 of the postings I read on linuxcnc.  The Xylotex boards have far better 
 support and are much more convenient to use as they have their own B.O.B.
 
 I have 2 myself, abide by the rules and my machine can move 25 ipm with a 
 27.5 volt supply.
 
 They are I believe the same allegro chip used on the xylotex boards, but 
 xylotex puts heat sinks on them and recommends plenty of air flow for full 
 output.  And they Just Work(TM).
 
Anyone help?

Thanks:

Bill


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 -- 
 Cheers, Gene


Hi Gene:

Thanks for the reply

yes I guess I should have used the Xylotex board, but now I have to work with 
what I have within reason.  If I do upgrade I will change to servos as I want 
to be sure that what I ask my cnc to do it will do it!!!

I made a index plate for a guy last summer and some of the holes were as much 
as .020 off!  Can't buy that.

Bill
 There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
 -Ed Howdershelt (Author)
 
 You're out of memory
 
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Re: [Emc-users] Magnetic Encoder

2010-02-28 Thread Kirk Wallace
On Sun, 2010-02-28 at 14:48 -0700, John Harris wrote:
 All,
 Be cautious about fitting magnetic encoders to the back of NEMA34 or 
 larger step motors. The magnetic field in the area where the encoder is to 
 be installed is strong enough to screw up the encoder readings.
 
 The effect shows up as noise on the position reading.
 
 John (The hard way)

I was thinking of using them for feed and spindle overrides. I don't
need a lot of resolution and the low wire count to hook them up is
attractive.

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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Re: [Emc-users] (no subject)

2010-02-28 Thread Steve Blackmore
On Sun, 28 Feb 2010 16:23:48 -0500, you wrote:


I have 2 myself, abide by the rules and my machine can move 25 ipm with a 
27.5 volt supply.

They are I believe the same allegro chip used on the xylotex boards, but 
xylotex puts heat sinks on them and recommends plenty of air flow for full 
output.  And they Just Work(TM).

Yea - just being the operative word :)

The Allegro chip looks good at a glance, it's quick with 1us pulse times
but exceed around 32V at your peril. They have a nasty (and regular)
habit of going pop. With the right steppers you can get reasonably good
performance, but they need to be low impedance to get the best at such
low voltages. 

Steve Blackmore
--

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Re: [Emc-users] Stepper controller setup

2010-02-28 Thread Gene Heskett
On Sunday 28 February 2010, Cathrine Hribar wrote:
On Sun, 28 Feb 2010 16:23:48 -0500

  Gene Heskett gene.hesk...@gmail.com wrote:
 On Sunday 28 February 2010, Cathrine Hribar wrote:
Hi All:

I have a problem with my stepper driver board.  The board is made by
Stepmaster. Board # SOP-1 ver. 1.2

I need steplen, stepspace, dirsetup, and dirhold.

Can't get steppers to be reliable faster than Max. Vol. .3

 The first link I found on Google doesn't bode well for making use of the
 device, it will not stand up to the music seems to be the general
 consensus of the postings I read on linuxcnc.  The Xylotex boards have
 far better support and are much more convenient to use as they have their
 own B.O.B.

 I have 2 myself, abide by the rules and my machine can move 25 ipm with a
 27.5 volt supply.

 They are I believe the same allegro chip used on the xylotex boards, but
 xylotex puts heat sinks on them and recommends plenty of air flow for
 full output.  And they Just Work(TM).

Anyone help?

Thanks:

Bill


-
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Hi Gene:

Thanks for the reply

yes I guess I should have used the Xylotex board, but now I have to work
 with what I have within reason.  If I do upgrade I will change to servos
 as I want to be sure that what I ask my cnc to do it will do it!!!

I made a index plate for a guy last summer and some of the holes were as
 much as .020 off!  Can't buy that.

Bill

Nope, never fly.  See if superglueing some heat sinks to them might help, and 
in my case, I have a pair of old psu fans running on about 18 volts to they 
really sing to you, one in each end of a box with the xylotex board in it, 
the box just fitting the outside dimensions of the fans, one blowing in one 
one end of the box, the other sucking out the other end, so I probably have a 
20 mph breeze flowing across both sides of the pcb itself. I've had one fan 
fail in about 5 years, so if you start with decent computer psu pulls that 
claim to be ball bearing models, and it lasts 10 minutes at the higher 
voltage, it should last 5-10 years.  I used 18 volts basically because that 
was the only lower tap I had on the motor psu I built from an old Ampex 2 
videotape machine's drum motor power supply.  Its a boat anchor if it ever 
fails...

Watch the electrolytic caps, the things in alu cans with plastic wrappers but 
bare tops.  If you see even a hint of bulging of the top of one of those, 
replace them last week if not before.  I haven't read any horror stories 
about those, yet.  But I am a retired C.E.T. and have been seeing problems 
with those ever since switching power supplies, with their light weight and 
high efficiencies causing a wholesale shift to their use for nearly 
everything.

Switching power supplies however are _not_ good power supplies for this use, 
they cannot absorb the energy recycling currents that flow in these chopper 
stabilized drives without either letting the output voltages soar out of 
spec, or seeing it as an error and doing a protective shutdown, usually in 
the middle of the most intricate cut of the job.  Been there, done that, 
built the linear, unregulated but huge output capacitance (75,000 uf, it was 
handy in my junk box) rig I now use in self defense.  It hasn't even gotten 
warm in 5 years of running 4 motors on my mill, sometimes for several days 
straight.

In any event, I don't think I would, even with heat sinks and fans, push 
those at above 2.0 amps/motor.  That limit will only effect, generally 
speaking, the amount of force available at slow speeds.  Only more voltage 
can get you above something like 20 a minute, and that will probably need 
dampers on the motors to achieve that.  I'm at about 27.5, so I can go a wee 
bit faster than the std 24 volt supply will get you to.  30 is pushing the 
envelope and may let the smoke out of these chips.  I run at 2.5 amps, but 
you could say I have extreme cooling too.

For motor dampers, there are several designs extant.  Mine are big fender 
washers with sheet rubber between them in loose stacks, others have used 
weighted skate wheels and such effectively too.  You can see mine, and I'm 
sure others here will also give links to their designs, on the back ends of 
the motors you can see in my mess at http://gene.homelinux.net:85/gene/emc, 
that bypasses the front page but only shows you filenames, click to see in 
most browsers.  Or you can take off the 'emc' and see me  the missus and 
some smaller web sized pix.

Good luck. ;)

-- 
Cheers, Gene
There are 

Re: [Emc-users] (no subject)

2010-02-28 Thread Gene Heskett
On Sunday 28 February 2010, Steve Blackmore wrote:
On Sun, 28 Feb 2010 16:23:48 -0500, you wrote:
I have 2 myself, abide by the rules and my machine can move 25 ipm with a
27.5 volt supply.

They are I believe the same allegro chip used on the xylotex boards, but
xylotex puts heat sinks on them and recommends plenty of air flow for full
output.  And they Just Work(TM).

Yea - just being the operative word :)

The Allegro chip looks good at a glance, it's quick with 1us pulse times
but exceed around 32V at your peril. They have a nasty (and regular)
habit of going pop. With the right steppers you can get reasonably good
performance, but they need to be low impedance to get the best at such
low voltages.

Steve Blackmore

I can't argue that Steve, having blown one.  And that is the reason the 
output filter cap in my linear motor power supply is 75,000 uf.  Yessiree 
Bob, gobble up them overvoltage spikes. ;-)

And because of the limited out cap size in switcher power supplies, they are 
bound to be trouble.  The simpler the better, but build it out of bulletproof 
stuff, pure analog.
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Cheers, Gene
There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
-Ed Howdershelt (Author)

Air is water with holes in it.

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Re: [Emc-users] EMC2 and cylindrical / OD grinding

2010-02-28 Thread a
Hi
I run cylindrical grinder Okuma and i know that there will be problem to
run cylindrical grinder with EMC2.
Problem is that cylindrical grinder will use special and unique for
cylindrical grinders cycle code and EMC2 doesn't have that. I grind
ceramics with diamond wheel and material removal per pass 0.0003. so,
without special cycle code it will be difficult to write point to point
program ( program  will be very long in compare to standard grinding cycle
)
maybe CAD/CAM can help but i never used CAD/CAM for grinding.

thanks
aram



 Hello everyone,

 Can anyone share any experiences they've had retrofitting a cylindrical
 / OD grinder with EMC/EMC2 or an equivalent? Or even a surface grinder?

 I'm mainly interested in controlling X and Y with 'G code' programs.
 Other machine control would be nice, but not important to start with.

 Donor machine would be either manual or hydraulically actuated, so at
 this time an assumption is ball screws would need to be fitted.

 Thanks for any info!

 Phil(f)
 WI, USA

 --
 Download Intel#174; Parallel Studio Eval
 Try the new software tools for yourself. Speed compiling, find bugs
 proactively, and fine-tune applications for parallel performance.
 See why Intel Parallel Studio got high marks during beta.
 http://p.sf.net/sfu/intel-sw-dev
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 Emc-users@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/emc-users




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proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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[Emc-users] UBUNTU and USB mouse?

2010-02-28 Thread a
Hi
I try to load UBUNTU on computer that has USB type mouse. During
installation mouse did not work.
Is the problem between USB mouse and UBUNTU?
should i only use mouse that plug directly into mother board?

thanks
aram



--
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Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
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Re: [Emc-users] EMC2 and cylindrical / OD grinding

2010-02-28 Thread Gene Heskett
On Sunday 28 February 2010, a...@conceptmachinery.com wrote:
Hi
I run cylindrical grinder Okuma and i know that there will be problem to
run cylindrical grinder with EMC2.
Problem is that cylindrical grinder will use special and unique for
cylindrical grinders cycle code and EMC2 doesn't have that. I grind
ceramics with diamond wheel and material removal per pass 0.0003. so,
without special cycle code it will be difficult to write point to point
program ( program  will be very long in compare to standard grinding cycle
)
maybe CAD/CAM can help but i never used CAD/CAM for grinding.

Subroutines that can increment the variable by .00025 a pass are well within 
emc's capabilities.  I have one 90 line program that sharpens table saw 
blades, takes it around 3 days to run.  Generally, I am not in a hurry as 
long as it gets done before I fall over, and I'm 75 now...

-- 
Cheers, Gene
There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
-Ed Howdershelt (Author)

diplomacy, n:
Lying in state.

--
Download Intel#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
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Re: [Emc-users] Parallel port issue

2010-02-28 Thread Rudy du Preez

 Hello!
 I have NetMos Technology PCI 9835 Multi I/O Controller with 1parallel an 2
 serial ports. When I configuring it to work in out-mode - it works fine,
 12 outputs and 5 inputs(i have checked outs with multimeter and ins by
 wire
 with the 470 R ). When I configuring it to work in in-mode, in hal
 configuration window I see that pin names have changed, but it works
 exectly
 as in out-mode, e.g. pin 2 named pin-02-in - but it does not in, 0V
 between it and ground. What is the matter? May it be non-bidirection
 controller?
 

Eugene

I had a similar problem over the weekend. I tried to assign an integrated
Parallel port 0 as cfg=0x378 in, and it would not be accepted. Eventually
I tried it as port 1, ie. 0xd000 out 0x378 in, with the d000 port a dummy
port, and it works!

Perhaps it will work for you as well.

Rudy


 

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database 4903 (20100228) __

The message was checked by ESET Smart Security.

http://www.eset.com
 


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Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
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http://p.sf.net/sfu/intel-sw-dev
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