Problem with MESA 7i76e and DQ542MA drivers

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02 Aug 2018 21:23 #115446 by rodw
It will be related to the changes to support joint axes.

Your joints need HOME_SEQUENCE= to be set and for Y to be equal to -1 on both axes.

See linuxcnc.org/docs/devel/html/config/ini-homing.html

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02 Aug 2018 21:33 #115447 by jmonteiro

rodw wrote: It will be related to the changes to support joint axes.

Your joints need HOME_SEQUENCE= to be set and for Y to be equal to -1 on both axes.

See linuxcnc.org/docs/devel/html/config/ini-homing.html


I just tried that but then I cannot move at all... let me try again, Will let you know in 15 minutes or so.

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02 Aug 2018 21:36 #115449 by rodw
There is a complete working config for a 7i76e here. Review the config against yours.
forum.linuxcnc.org/47-hal-examples/34072...antry-example#106523

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02 Aug 2018 22:04 #115454 by jmonteiro
This is what I get:

"Homing is REQUIRED to jog requested coordinate because joint (1) in home_sequence is negative (-1)"

And I cannot seem to be able to Home Y at all, it is not even on my UI. I see the Home X and Home Z but no Home Y. And the "Home Axis" does not unblock it, still get the same message.

I guess I need to compare my config with the one you posted and see if I notice any differences.

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02 Aug 2018 22:25 #115459 by jmonteiro
Ok, I figured it out, I was missing a line on the HAL file, I used to have:

net z-is-homed halui.joint.2.is-homed

but I needed to have:

net y2-is-homed halui.joint.2.is-homed
net z-is-homed halui.joint.3.is-homed

Now I can home the 2 Y Axis and it moves both motors. Thank you so much Rod :)

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02 Aug 2018 22:53 #115467 by rodw

jmonteiro wrote: Ok, I figured it out, I was missing a line on the HAL file, I used to have:

net z-is-homed halui.joint.2.is-homed

but I needed to have:

net y2-is-homed halui.joint.2.is-homed
net z-is-homed halui.joint.3.is-homed

Now I can home the 2 Y Axis and it moves both motors. Thank you so much Rod :)


Cool!

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05 Nov 2018 00:06 - 05 Nov 2018 01:16 #119952 by jmonteiro
Another issue I'm having that you masters might be able to help me quickly :)

I added proximity switches to my CNC and I can home the machine fine on both X and Z using the proximity switch but not on Y. I have 2 axis in parallel, so both Y0 and Y1 are part of my Y, both have a proximity switch on the zero but I can't seem to be able to use them at all. I don't even have a "Home Y" on my user inter
face :(

I found out the problem, it is working now :)

Attached are my ini and hal files.

File Attachment:

File Name: my_new_cnc.ini
File Size:5 KB

File Attachment:

File Name: my_new_cnc.hal
File Size:12 KB
Attachments:
Last edit: 05 Nov 2018 01:16 by jmonteiro.

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05 Nov 2018 00:54 #119955 by rodw
Its expected behaviour you can't home Y.
Try Home All instead

Until you home all, you are in joint mode and you don't have a Y axis due to the dual motors (joints) and you can't move them on their own

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05 Nov 2018 01:18 - 05 Nov 2018 01:19 #119956 by jmonteiro
Quick reply Rod :) you are correct "Home All" is now working fine and it even squares it off fine :)

Now I just need to get my Delta VFD-E and spindle working with LinuxCNC, after that I can finally use it.
Last edit: 05 Nov 2018 01:19 by jmonteiro.

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05 Nov 2018 01:39 - 05 Nov 2018 01:45 #119958 by dgarrett

Until you home all, you are in joint mode and you don't
have a Y axis due to the dual motors (joints) and you can't
move them on their own

Use of the "Home All" button itself is not required as one can home
individual joints or synchronized joints as groups. Coordinated (axis)
movement is not available until ALL joints are homed whether you use
"Home All" or home joints (or joint groups) individually.

NOTE:

By default, the synchronization provisions disallow joint jogging prior
to homing in order to prevent joint jogs that could misalign the machine (gantry
racking for example).

Ref: linuxcnc.org/docs/master/html/config/ini...l#_inhibiting_homing

The above reference illustrates a method to move individual joints prior to homing
but it is not likely appropriate for a gantry with a racking liability.

Properly specified synchronized joints home together.
As an example, try the simulation config
configs/sim/axis/gantry.ini.
(No special hardware is required for sim configs)

This sim config uses joints 1 and 3 for the y coordinate:
[KINS]
JOINTS=4
KINEMATICS = trivkins coordinates=XYZY kinstype=BOTH
...
[TRAJ]
COORDINATES = XYZY
...
[JOINT_0]
HOME_SEQUENCE      = 0

[JOINT_1]
HOME_SEQUENCE      = -1

[JOINT_2]
HOME_SEQUENCE      = 2

[JOINT_3]
HOME_SEQUENCE      = -1

(kinstype=BOTH is useful and recommended as it clarifies the transition
from joint mode to cartesian mode once all joints are homed)

The axis gui provices dropdowns that allow homing of indivdual joints
or grouped joints when they are configured for synchronization.

Example:



For more info on homing, see:
Ref: linuxcnc.org/docs/master/html/config/ini-homing.html
Attachments:
Last edit: 05 Nov 2018 01:45 by dgarrett.

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