Configuring endstops in series - Error troubleshooting
13 Mar 2022 23:08 #237157
by MacLaddy
It worked! Z now homes. I appreciate the help, really. My brain doesn't work in code. Unfortunately, after Z-homed it started homing only Y1. It should have done Y1 and Y2 together. After I manually triggered Y1 it threw this error:
Cannot home while shared home switch is closed J=2.
I'm regretting trying to wire these in series without knowing what I'm doing. Would it be worth it for me to start over and use four pins for four sensors, or would that be like swimming halfway and turning back?
Replied by MacLaddy on topic Configuring endstops in series - Error troubleshooting
The shared home signal names don't match so there
is no connection from your hardware to LinuxCNC:
net home-x-y1 <= parport.0.pin-10-in-not
net home-z-y2 <= parport.0.pin-11-in-not
...
net home-x => joint.0.home-sw-in
net home-y1 => joint.1.home-sw-in
net home-y2 => joint.2.home-sw-in
net home-z => joint.3.home-sw-in
should be something like:
net home-x-y1 => joint.0.home-sw-in
net home-x-y1 => joint.1.home-sw-in
net home-z-y2 => joint.2.home-sw-in
net home-z-y2 => joint.3.home-sw-in
It worked! Z now homes. I appreciate the help, really. My brain doesn't work in code. Unfortunately, after Z-homed it started homing only Y1. It should have done Y1 and Y2 together. After I manually triggered Y1 it threw this error:
Cannot home while shared home switch is closed J=2.
I'm regretting trying to wire these in series without knowing what I'm doing. Would it be worth it for me to start over and use four pins for four sensors, or would that be like swimming halfway and turning back?
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- tommylight
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13 Mar 2022 23:46 #237166
by tommylight
Replied by tommylight on topic Configuring endstops in series - Error troubleshooting
That last thing you said... ![:) :)](/media/kunena/emoticons/smile.png)
From the J2 error, the joint 2 switch was triggered and since booth joints are the same axis, it will not do it.
Make sure the Home_sequence is -1 for both Y joints, the Z is 0 and X is 1.
Also do add some Home_offset to all joints/axis so they do back up a bit after homing and release the switch. This might require a bit of testing with adding or removing a - in front of the value to get the direction right. 2 to 3mm should be enough.
After everything is working properly, adjust the home_offset for Y joints to get the gantry squared after homing.
![:) :)](/media/kunena/emoticons/smile.png)
From the J2 error, the joint 2 switch was triggered and since booth joints are the same axis, it will not do it.
Make sure the Home_sequence is -1 for both Y joints, the Z is 0 and X is 1.
Also do add some Home_offset to all joints/axis so they do back up a bit after homing and release the switch. This might require a bit of testing with adding or removing a - in front of the value to get the direction right. 2 to 3mm should be enough.
After everything is working properly, adjust the home_offset for Y joints to get the gantry squared after homing.
The following user(s) said Thank You: MacLaddy
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14 Mar 2022 00:20 #237170
by MacLaddy
Replied by MacLaddy on topic Configuring endstops in series - Error troubleshooting
Getting closer. It now homes z with a small offset. But then goes on to try and home X, Y1 and Y2 at the same time. This can't work, because X and Y1 share a pin. If X triggers, it also triggers Y1 which racks the machine.
I've tried using Home_Is_Shared = 1 on all four joints. It didn't like it, so I changed it to just the Y joints, then just the X & Y1 joints, etc. It doesn't seem to like anything.
I've tried using Home_Is_Shared = 1 on all four joints. It didn't like it, so I changed it to just the Y joints, then just the X & Y1 joints, etc. It doesn't seem to like anything.
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14 Mar 2022 00:30 #237171
by PCW
Replied by PCW on topic Configuring endstops in series - Error troubleshooting
I would think that the joint 1 and 2 (Y1 and Y2) should be -2 so its done last
The following user(s) said Thank You: tommylight, MacLaddy
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14 Mar 2022 00:42 #237173
by MacLaddy
Still things to figure out, like homing velocities, directions, and offsets. But at least now I know I won't wrack the machine while testing.
Replied by MacLaddy on topic Configuring endstops in series - Error troubleshooting
It worked! I didn't realize I could use the number two. The documentation said I could use 0, -1, & 1. I also added Home_Is_Shared to only the X & Z axis. This configuration works!I would think that the joint 1 and 2 (Y1 and Y2) should be -2 so its done last
Still things to figure out, like homing velocities, directions, and offsets. But at least now I know I won't wrack the machine while testing.
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14 Mar 2022 09:47 #237199
by tommylight
Thanks PCW.
Replied by tommylight on topic Configuring endstops in series - Error troubleshooting
That is correct, sorry for the confusion.I would think that the joint 1 and 2 (Y1 and Y2) should be -2 so its done last
Thanks PCW.
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