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Author Topic: HELP! no lpt output. (advanced)  (Read 3096 times)

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HELP! no lpt output. (advanced)
« on: December 31, 2010, 08:08:27 PM »
im new here, and to mach. been doing my research for a while tho. really good with computers and electronics.

here is the problem.

i get no output from the parallel port (lpt). when i try to jog the axis (x,y,z,a). i have verified this with a multi meter directly at the port on the motherboard.



HERE IS WHAT I HAVE DONE.

i am running the latest version of mach. Mach3 R3.042.040

ran the mach3 driver test. (it works perfectly)

i uninstall ed and re installed the mach driver (per the manual, meaning i deleted all traces of the driver from my system)

i uninstall ed and re installed mach (with a new download)

i uninstall ed and re installed the parallel port driver (windows)

i tried installing a pci parallel port add on card.

i verified and tried different ports and pins for everything.

the parallel port addresses are correct.

i tried changing the different bios settings for the parallel port


im at a loss right now.  there is no output coming from the axis ports. i DO get a charge pump signal. it seems to work fine. but nothing else does.

if you have read the above and can think of anything else for me to try please let me know.


Offline Hood

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Re: HELP! no lpt output. (advanced)
« Reply #1 on: December 31, 2010, 08:12:10 PM »
Attach your xml and someone will have a look and see if there is a config error.
Hood
Re: HELP! no lpt output. (advanced)
« Reply #2 on: December 31, 2010, 08:23:49 PM »
xml

Offline Hood

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Re: HELP! no lpt output. (advanced)
« Reply #3 on: January 01, 2011, 03:42:21 AM »
Ok first thing I see id your X axis is set to Port 3 for both Step and Dir, that is not correct.
I also see you have the E-Stop set to port 0 which I will presume means you dont have an E-Stop switch connected, if thats the case then you will probably need to set it Active Low so that when you press the Reset button it will stop flashing.


Hood
Re: HELP! no lpt output. (advanced)
« Reply #4 on: January 01, 2011, 04:20:10 PM »
I got it working!

the problem was with the cable. i bought a "lap link" cable. which swaps pins from one end to the other. = not good.

x axis on port 3 was due to my testing the secondary lpt port card that i added on.

and yes no e stop yet. i will change it when i get one hooked up.


thanks for your help.

Offline Hood

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Re: HELP! no lpt output. (advanced)
« Reply #5 on: January 01, 2011, 04:24:19 PM »
Just for your reference, if using the parallel port for outputs you will never have an output to port 3 as even if you have two ports they are still either port 1 or port 2.

Hood
Re: HELP! no lpt output. (advanced)
« Reply #6 on: January 01, 2011, 05:03:50 PM »
I know, I was just "trying everything" as the port on the computer was lpt 3. I tried port 2 previously.

Again. Thanks for the help

Offline Hood

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Re: HELP! no lpt output. (advanced)
« Reply #7 on: January 01, 2011, 05:05:18 PM »
No probs, was just in case you had not realised and it got you stumped in the future :)
Hood