New user, just got the machine going

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17 Mar 2021 21:59 #202656 by desertmoose
I just got my home made router going. Have Linuxcnc running it. The electronics is an OLD hobbyCNC kit I put together. The router has ball screws on all axis. Travel is x-28", y-18", z-4.38"

I put power to it for the first time today. All axis move correctly in the test this axis portion of the stepconfig? window. However the z axis will not move continuous with the manual command on the axis screen. It jumps a few thousands and quits and I get the following error:

END OF MOVE IN HOME STATE 5.

Another problem is the z axis will not enable homed. I can set the x and y to home, but z will not.

I have the home switch at the top of the travel, and set the travel range both from 0 to -4.38 and then tried from -4.38 to 0
Both of these gives the same error.
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17 Mar 2021 22:56 #202670 by Clive S

I just got my home made router going. Have Linuxcnc running it. The electronics is an OLD hobbyCNC kit I put together. The router has ball screws on all axis. Travel is x-28", y-18", z-4.38"

I put power to it for the first time today. All axis move correctly in the test this axis portion of the stepconfig? window. However the z axis will not move continuous with the manual command on the axis screen. It jumps a few thousands and quits and I get the following error:

END OF MOVE IN HOME STATE 5.

Another problem is the z axis will not enable homed. I can set the x and y to home, but z will not.

I have the home switch at the top of the travel, and set the travel range both from 0 to -4.38 and then tried from -4.38 to 0
Both of these gives the same error.


It would be good if you could post the hal and ini files from the machine config folder

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17 Mar 2021 23:11 #202675 by desertmoose
OK, I'll see if I can get them onto a thumb drive so I can bring them up to my internet connected computer.

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17 Mar 2021 23:23 #202679 by desertmoose
Hope they come thru OK. Are these the files generated by the stepconf wizard?
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19 Mar 2021 00:17 #202785 by andypugh
You have homing configured for Z, but not for X or Y. So X and Y will home where they are, without moving. Z will search for the home switch.
However, the search and latch velocities for Z seem _very_ slow.

Also, the Z axis has almost no range, in the INI posted.
MIN_LIMIT = -0.01
MAX_LIMIT = 0.01

0.02" total travel seems very small.

Also, i think that your home search velocities are wrong for a top-of-travel switch.

And, also, there is a HOME_OFFSET of zero but no HOME_POSITION so the axis will still be on the swtich when homing finishes (this is probably the error that you are seeing)

Have you found this page in the docs?
linuxcnc.org/docs/2.8/html/config/ini-homing.html

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19 Mar 2021 14:05 #202834 by desertmoose
I am brand new to Linux and LinuxCnc. I didn't even know the Hal and ini files existed until you guys asked for them. I looked at the files after I posted them and spotted the limit on Z was different from X and Y. I changed Z to -4.38, and 0.01, and the error went away! Having only the homing enabled on Z was while I was troubleshooting Z homing not working. Turns out my soldering skills on the dinky pins in the 8 pin DIN connector provided in the kit leave a lot to be desired. The only axis I successfully hooked up was X. Both Y and Z home and Limit all have opens. Thanks for the link to the homing info. I'll be checking it out after I get the wiring redone. Also, I noticed that the homing speed was REAL slow. I just used the wizard to set it up, and that's what it gave me. Any recommendations for a better setting on this? Thanks again for the help.

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19 Mar 2021 14:30 #202836 by andypugh

Also, I noticed that the homing speed was REAL slow. I just used the wizard to set it up, and that's what it gave me. Any recommendations for a better setting on this?


Often you will use something close to max velocity for search, and something rather slower for latch.

But that does depend on the switches, there needs to be enough over-travel to stop from the search velocity inside the switch travel. And that depends on the axis acceleration settings.

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