Startech PEX1P parallel port card problems
15 Feb 2019 00:39 #126511
by kborsum
Replied by kborsum on topic Startech PEX1P parallel port card problems
Been there, done that. Regardless of the voltage on the input pin (GND or V+5) to the parallel port card (NOT the bob), LinuxCNC treats the input as asserted. SO if the PEX1P card IS working, then LinuxCNC isn't.
Not being a Linux or LinuxCNC guru, I've got no way to check the input status other than with the LinuxCNC response. If there is a linux command line command that will read and display the input, please tell me!
Not being a Linux or LinuxCNC guru, I've got no way to check the input status other than with the LinuxCNC response. If there is a linux command line command that will read and display the input, please tell me!
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- Todd Zuercher
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15 Feb 2019 04:03 #126522
by Todd Zuercher
Replied by Todd Zuercher on topic Startech PEX1P parallel port card problems
The C10 boards from cnc4pc are usually pretty good.
To test an input on the parallel port, a 450ohm resistor from an output pin to an input. Then toggle the output on/off and watch to see if the input changes.
To test an input on the parallel port, a 450ohm resistor from an output pin to an input. Then toggle the output on/off and watch to see if the input changes.
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15 Feb 2019 09:46 #126526
by andypugh
If outputs work then LinuxCNC is working too.
It is possible to have the parallel port "write" function running and not the "read" function, but you have to set up the HAL file that way deliberately.
Just to check, with LinuxCNC running, open a terminal and type "halcmd show funct"
Replied by andypugh on topic Startech PEX1P parallel port card problems
SO if the PEX1P card IS working, then LinuxCNC isn't.
If outputs work then LinuxCNC is working too.
It is possible to have the parallel port "write" function running and not the "read" function, but you have to set up the HAL file that way deliberately.
Just to check, with LinuxCNC running, open a terminal and type "halcmd show funct"
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17 Feb 2019 00:19 #126635
by kborsum
Replied by kborsum on topic Startech PEX1P parallel port card problems
Got one on order...looks like a Model-T...just the basics, which is excellent for testing.
I'll try your method of testing as soon as the replacement PPT cards I have on order show up.
Have you used the C11G card from cnc4pc? With linuxCNC in particular??? I like the selectable pullup or pulldown on the inputs!
I'll try your method of testing as soon as the replacement PPT cards I have on order show up.
Have you used the C11G card from cnc4pc? With linuxCNC in particular??? I like the selectable pullup or pulldown on the inputs!
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17 Feb 2019 00:22 #126636
by kborsum
Replied by kborsum on topic Startech PEX1P parallel port card problems
This is the basic installation for LinuxCNC, and I have not messed with any of the HAL files, yet.
I'll try your command suggestions as soon as I get a new PPT card delivered this week.
I'll try your command suggestions as soon as I get a new PPT card delivered this week.
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