1. Configuring LinuxCNC
  3. Basic Configuration
  5. How to. 2 or more motors on one axis. Gantry

How to. 2 or more motors on one axis. Gantry

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17 Feb 2020 15:20 #157623 by ikkuh
Replied by ikkuh on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master

I turned off the "require homing " before movement option in pncconf before I modified the files.


You should always home, else you will wreck your gantry (I know cuz I did once)

I went back a created a very generic config and I can jog the motors from the Linuxcnc home page.


Try Big John's tool, you will be amazed!

I have a lot to learn still. I am reading everything can but some of it is confusing because it is not my controller/ setup and it takes me down a path that does not work for me.


That's how we all learned, maybe you could take notes so you can help the next poor soul who wants to try this out?
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17 Feb 2020 15:23 #157624 by J Crowder
Replied by J Crowder on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
Thanks. I will check out your files to see if I can see any obvious deltas. I appreciate everyone's input as I am slowly picking this up.

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17 Feb 2020 15:26 #157625 by ikkuh
Replied by ikkuh on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master

I do but I am sure it is not wired correctly. I really need to find some good schematics on how others have wired e-stop, limit switches, etc. .


What about:
# This file was created with the 7i96 Wizard on Apr 19 2019 14:51:58
# If you make changes to this file your screwed

net home-joint-0 joint.0.home-sw-in <= hm2_7i96.0.gpio.000.in
net home-joint-1 joint.1.home-sw-in <= hm2_7i96.0.gpio.001.in
net home-joint-2 joint.2.home-sw-in <= hm2_7i96.0.gpio.002.in
net home-joint-3 joint.3.home-sw-in <= hm2_7i96.0.gpio.003.in

#probe
net probe-input motion.probe-input <= hm2_7i96.0.gpio.009.in

Straight from the io.hal file

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17 Feb 2020 15:30 #157627 by J Crowder
Replied by J Crowder on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
When I go to install the tool from github I get the following error,
"joe@LinuxCNC:~$ pip3 install git+https://github.com/jethornton/7i96.git
Collecting git+https://github.com/jethornton/7i96.git
Cloning github.com/jethornton/7i96.git to /tmp/pip-_77qnkxs-build
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'setuptools'
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-_77qnkxs-build/

I am running Mint 19.2 mate, don't know if that matters.

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17 Feb 2020 15:50 - 17 Feb 2020 15:51 #157629 by ikkuh
Replied by ikkuh on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
(we better make this a new thread)

Did you skip this step?
Depends on python3-pyqt5 and python3-setuptools and libpci


I use Debian 9 and I do not have any troubles at all setting this up.

(Example from my virtual machine at home)

Attachments:
Last edit: 17 Feb 2020 15:51 by ikkuh.

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17 Feb 2020 15:54 - 17 Feb 2020 15:55 #157631 by ikkuh
Replied by ikkuh on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
github.com/jethornton/7i96/issues/8

packaging.python.org/tutorials/installin...wheel-are-up-to-date
python -m pip install --upgrade pip setuptools wheel

Debian is the way to go :)
Last edit: 17 Feb 2020 15:55 by ikkuh.

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17 Feb 2020 16:23 #157634 by J Crowder
Replied by J Crowder on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
I did the first two steps but I get this:
Attachments:

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17 Feb 2020 16:44 #157636 by J Crowder
Replied by J Crowder on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
I am dropping this on this thread. I will rethink my options and maybe start over with Debian. Thanks for your help.
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18 Feb 2020 11:30 - 18 Feb 2020 12:06 #157708 by ikkuh
Replied by ikkuh on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master

maybe start over with Debian.


If you do be sure to follow the instructions at
http://buildbot.linuxcnc.org/

I have been using the master branch for a while now. Rarely there are problems with that version. I highly recommend to use the latest version so you are set for the future.
Last edit: 18 Feb 2020 12:06 by ikkuh.
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19 Feb 2020 03:52 - 19 Feb 2020 03:54 #157809 by J Crowder
Replied by J Crowder on topic How to. 2 or more motors on one axis. Gantry LinuxCNC 2.8 Master
Thank you. I have a working program that turns all 4 motors in the correct order! I did get the Debian Stretch working and upgraded LinuxCNC to 2.9. I think I like Mint more but at this point I am just using the OS to get to the CNC program so I don't think I will change it back. BTW, Big John's tool did not work for me. I got it working with pncconf and the tandem axis setting for the Y2 joint.
Last edit: 19 Feb 2020 03:54 by J Crowder.

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  1. Configuring LinuxCNC
  3. Basic Configuration
  5. How to. 2 or more motors on one axis. Gantry
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