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Need help setting up parallel port on new build

CNCApples
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29 Aug 2021 06:01 #219070 by CNCApples

Replied by CNCApples on topic Need help setting up parallel port on new build

The LinuxCNC home page suggests that 2.7 is generally a better choice for software stepping using a parallel port.
I'm still at the beginning of my project anyhow so I will install 2.8 and report back

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phillc54
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29 Aug 2021 06:56 - 29 Aug 2021 06:57 #219073 by phillc54

Replied by phillc54 on topic Need help setting up parallel port on new build

The error you are getting is in the hal file, lut5.0.in-4 is used twice (in the first and last lines).

net all-limit-home => lut5.0.in-4
net all-limit <= lut5.0.out
net homing-x <= axis.0.homing => lut5.0.in-0
net homing-y <= axis.1.homing => lut5.0.in-1
net homing-z <= axis.2.homing => lut5.0.in-2
net homing-a <= axis.3.homing => lut5.0.in-3
net homing-b <= axis.4.homing => lut5.0.in-4

The lut5 component only has 5 inputs. Changing it to the following may work:

net all-limit-home => lut5.0.in-4
net all-limit <= lut5.0.out
net homing-x <= axis.0.homing => lut5.0.in-0
net homing-y <= axis.1.homing => lut5.0.in-1
net homing-z <= axis.2.homing => lut5.0.in-2
loadrt or2
addf or2.0 servo thread
net homing-a <= axis.3.homing => or2.0.in0
net homing-b <= axis.4.homing => or2.0.in1
net homing-ab <= or2.0.out    => lut5.0.in-3

Last edit: 29 Aug 2021 06:57 by phillc54.

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CNCApples
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29 Aug 2021 09:35 #219079 by CNCApples

Replied by CNCApples on topic Need help setting up parallel port on new build

So after a bit of trouble I was able to install 2.8 and made the changes to the HAL and INI file, included here.
However I am now getting another issue but still relating to homing.
I've done a fair bit of reading regarding HAL and INI but am having difficulty here, do you know of any more resources I could look into?

Debug file information:
Note: Using POSIX realtime
./demo_machine.hal:47: Pin 'axis.0.homing' does not exist
1521
stopping realtime threads
Unloading hal components
Note: Using POSIX realtime.

File Attachment:

File Name: demo_machi...8-29.hal
File Size:5 KB

File Attachment:

File Name: demo_machi...8-29.ini
File Size:3 KB

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phillc54
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29 Aug 2021 09:42 #219081 by phillc54

Replied by phillc54 on topic Need help setting up parallel port on new build

Now that you are on 2.8 it will be joint.0 rather than axis.0 for the changes.

The standard docs are quite reasonable.
linuxcnc.org/docs/2.8/html/

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CNCApples
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29 Aug 2021 09:56 #219082 by CNCApples

Replied by CNCApples on topic Need help setting up parallel port on new build

Thank you, I've gone ahead and made the changes from axis to joint but now I'm getting another issue with regards to the changes made earlier.

HAL: ERROR: bad position: 0
./demo_machine.hal:51: addf failed
2241

Cheers for the link, I think I may take a day or two off this to have a read through

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phillc54
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29 Aug 2021 10:00 - 29 Aug 2021 10:01 #219084 by phillc54

Replied by phillc54 on topic Need help setting up parallel port on new build

Sorry, that line should be:

addf or2 servo-thread

Last edit: 29 Aug 2021 10:01 by phillc54.

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CNCApples
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29 Aug 2021 10:24 #219085 by CNCApples

Replied by CNCApples on topic Need help setting up parallel port on new build

I was able to fix that issue and a couple others further down on line 122 where I'd copied 'a' axis info and did not replace with 'u'. And now I have another one but this one really has me stumped.

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phillc54
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29 Aug 2021 10:29 #219086 by phillc54

Replied by phillc54 on topic Need help setting up parallel port on new build

You will need a 'U' here as well.

KINEMATICS = trivkins coordinates=XYZA

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CNCApples
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29 Aug 2021 10:58 #219089 by CNCApples

Replied by CNCApples on topic Need help setting up parallel port on new build

It Runs. Thank you so much for all your help!
I am indebted to you!

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phillc54
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29 Aug 2021 11:03 #219090 by phillc54

Replied by phillc54 on topic Need help setting up parallel port on new build

You are welcome.
Enjoy...

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Need help setting up parallel port on new build

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