Home switches stopping machine but not latching fully

More
11 Sep 2026 23:45 #349586 by RMJ fabrication
Greetings everyone, I call for help on a new issue with my plasma table. So basically when I go to press home all the homing sequence begins. The z axis homes successfully 90% of the time, the x axis homes successfully half the time, and the y axis gantry does not successfully home. I get these errors with the x and y axis.   
Attachments:

Please Log in or Create an account to join the conversation.

More
12 Sep 2026 02:49 #349588 by PCW
Sounds like either an electrical noise issue or maybe contact bounce.

What type of switches are used and what are they connected to?

Please Log in or Create an account to join the conversation.

More
12 Sep 2026 12:39 #349597 by rodw
Just checking you know, home switches need to stay triggered to end of travel.
Also be sure to add a home-offset to move off the home switch trigger
 

Please Log in or Create an account to join the conversation.

More
14 Sep 2026 05:26 #349625 by RMJ fabrication
Replied by RMJ fabrication on topic Home switches stopping machine but not latching fully
These are the limit switches I am using I believe they are connected to tb5 on the mesa 7i76e.   
And here are my latch positions and velocities   
Attachments:

Please Log in or Create an account to join the conversation.

More
15 Sep 2026 11:16 #349646 by rodw
Please share your hal and ini files.

Please Log in or Create an account to join the conversation.

More
16 Sep 2026 17:35 #349680 by RMJ fabrication
Replied by RMJ fabrication on topic Home switches stopping machine but not latching fully
Here is my HAL and INI files.
 

File Attachment:

File Name: my_LinuxCN...9-16.hal
File Size:11 KB

 

File Attachment:

File Name: my_LinuxCN...9-16.ini
File Size:5 KB
Attachments:

Please Log in or Create an account to join the conversation.

More
16 Sep 2026 19:16 #349685 by PCW
You might plot the switch  hal signals with halscope when homing to get a better
idea of whats going on.

(it might be contact bounce or EMI)

 

Please Log in or Create an account to join the conversation.

More
17 Sep 2026 06:52 #349695 by rodw
Please  try using a HOME_OFFSET of 0.1 inch. You want the axis to be off the home switch after homing. Not sure whether this should be positive or negative. If it fails, change the sign and try again...

Please Log in or Create an account to join the conversation.

More
18 Sep 2026 05:36 #349701 by RMJ fabrication
Replied by RMJ fabrication on topic Home switches stopping machine but not latching fully
I ordered new switches and replaced them and now the homing sequence is working and latching fully. Now homing works all the time with no errors and I did not change any settings in the configuration.
 
The old switches are at least two years old so it could have been contact bounce. Big thank you to everyone for your resourceful feedback and kind help.
Attachments:

Please Log in or Create an account to join the conversation.

Moderators: snowgoer540
Time to create page: 0.219 seconds
Powered by Kunena Forum