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Author Topic: Pins 2 & 3 dont work.  (Read 6331 times)

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Offline geast

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Pins 2 & 3 dont work.
« on: April 10, 2010, 04:41:55 PM »
Hi everybody.
I can't get the output pins 2 & 3 make them work.
I try to set them in the port and pins menu, as motor X pulse & direction outputs but nothing happens.
If i try the same at pins 4 and 5 or 6 and 7 everything works fine.
What is so special with this to pins 2&3 that they don't operate?
Has anyone any ideas?
Re: Pins 2 & 3 dont work.
« Reply #1 on: April 10, 2010, 05:05:43 PM »
Maybe you have them duplicated, or maybe disabled, or your port may have those pins damaged

Offline geast

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Re: Pins 2 & 3 dont work.
« Reply #2 on: April 11, 2010, 10:08:38 AM »
What do you mean with disabled?
I enable them in the menu pins & ports, as i did with pins 4&5 or do i have to enable them somewhere else?

Offline Tweakie.CNC

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Re: Pins 2 & 3 dont work.
« Reply #3 on: April 11, 2010, 11:32:02 AM »
Just a suggestion.

If you download and run Parmon http://www.geekhideout.com/parmon.shtml
Then you can visually see if pins 1 and 2 are changing state from your GCode program or jog buttons.
Assuming they are changing state then you may have a defective LPT cable, bad connection or bad stepper driver.
Assuming they do not change state then you almost certainly have a damaged port if these pins are enabled and the correct port selected etc.

Hope this helps,

Tweakie.
KEEP SAFE !

Offline geast

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Re: Pins 2 & 3 dont work.
« Reply #4 on: April 12, 2010, 01:56:12 PM »
Thank you tweake very much for the utility, but it just show me exactly what is happen at the port.
It does not matter if i program 2 & 3 pins it just keep pulsing only pins 4 & 5 and 6 & 7, although i program axis X 2 & 3 pins, port 1 and for axis Y 4 & 5 pins port 1. There is now way i can make the pins 2 & 3 work.

Offline Tweakie.CNC

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Re: Pins 2 & 3 dont work.
« Reply #5 on: April 13, 2010, 02:35:23 AM »
In that case there is more than a good chance that your port is damaged.
Assuming the rest of the PC is running OK you need to obtain a PCI parallel port card or get another PC motherboard.

Tweakie.
KEEP SAFE !

Offline geast

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Re: Pins 2 & 3 dont work.
« Reply #6 on: May 01, 2010, 05:00:08 AM »
I try another motherboard,same brand, same P/N and i get the same results.
No mater how i program the motor pins for the X axis or Y the keep pulsing at the output pins 4,5.
When i program this at the second parallel port everything is ok.
Should i program at the bios setup level the parallel port somehow else?
I just set it as a normal and not EPP, or bidirectional.
For the history the motherboard is a Kontron 886LCD/ATX(GV), but i already try three of them and i always get the same results.
Any help will be appreciated.
Re: Pins 2 & 3 dont work.
« Reply #7 on: May 01, 2010, 07:26:58 AM »
Try a fresh installation of a previous mach3 version, probably .036.  ftp://machsupport.com/Mach/.

Make sure to start with a fresh xml.

Please send return feedback.

Arturo Duncan
http://cnc4pc.com
Re: Pins 2 & 3 dont work.
« Reply #8 on: May 02, 2010, 04:42:00 AM »
Hi there I had a similar problem only mine was pins 4 & 5 tried swapping cables to different drive no change .
Put a meter across the pins and pressed the jog I could only see 0.5 volt change .
Changed the cable to pins 8 & 9 corrected the pinouts in config and all worked well so I could have a problem in the cable or the breakout board or out bound from the computer this I will look at later when I get round to changing the PC

Paul
If it can't be fixed with a hammer then it must be an electrical fault

Offline Sweep

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Re: Pins 2 & 3 dont work.
« Reply #9 on: May 02, 2010, 11:24:27 AM »
Hi all,

It's been a while since I was on here as I only seem to come on when I have problems. Thanks in advance  ;)

I have got a similar problem that is driving me nuts so thought I would tag it to this post due to the similarity.

I have just started connecting up my axis stepper motors and (pwm controlled) spindle motor to the PC. To make sure everthing worked ok I decided to do one at once.
Configuring pin1 to spindle the oscilloscope shows a nice square wave pattern which changes as I shift motor rpm. If I reconfigure the same pin1 to Xstep nothing happens?
Changing from pin1 to pin4 has the same effect; spindle works, Xstep doesn't?
Besides that, when looking at the diagnostics screen the matrix of 'LEDs' that show the state of the pins always have the middle four illuminated no matter what I do. Considering I have no inputs or outputs connected, besides the one which I am testing, how can this be?

...Sweep