Gantry with Dual Y-Motors mos-assigning signals

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12 Jun 2019 03:19 - 12 Jun 2019 16:37 #136688 by naja452
I'm setting up a router with dual Y Motors. I've followed this guide on how to setup multiple joints on a single axes.

forum.linuxcnc.org/49-basic-configuratio...-linuxcnc-2-8-master

motors setup as such:
joint0 - X
joint1 - Y
joint2 - YY
joint3 - Z

I've done it to a T, and get no errors, but when I jog the z axis, it jogs joint 2 instead of 3 as it should.

My configs are attached, thanks!

File Attachment:

File Name: Platform_CNC.ini
File Size:3 KB
Attachments:
Last edit: 12 Jun 2019 16:37 by naja452.

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12 Jun 2019 03:41 - 12 Jun 2019 03:55 #136690 by dgarrett
[TRAJ]
AXES = 3
COORDINATES = X Y Z
...
[KINS]
JOINTS = 4
KINEMATICS = trivkins coordinates=XYYZ

Your ini file sections that specify coordinates not consistent.
Try:
[TRAJ]
COORDINATES = XYYZ

See:
linuxcnc.org/docs/master/html/getting-st..._axes_specifications

Notes:
1) [TRAJ]AXES= item is not used in this 2.8~pre nor in master branch
2) Problems like this are easier to see/understand/debug by specifying
kinstype=both to clarify distinctions of joints (pre-homing) and
axes coordinates (post-homing):
[KINS]
JOINTS = 4
KINEMATICS = trivkins coordinates=XYYZ kinstype=both

3) there may be other problems but not visibile without seeing all hal files
Last edit: 12 Jun 2019 03:55 by dgarrett.

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12 Jun 2019 16:38 #136758 by naja452
That doesn't jive with that other guide, but it does make sense, I'll try that this afternoon!

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12 Jun 2019 17:09 #136764 by pl7i92
please post also the HAL file so we can see hoe the pins are conneced

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