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Author Topic: Home Off Error X Axis  (Read 3209 times)

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Offline c30232

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Home Off Error X Axis
« on: December 31, 2014, 02:44:44 AM »
When homing X with the home-off set to 0.800" the home-off sets to approximately 7.995".  Set at .010" the result is approximately 0.070"   Any ideas why?  Additionally, homing triggers a reset.  The only other axis, A, works fine.  I swapped limit switches with the same result.   

Offline Hood

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Re: Home Off Error X Axis
« Reply #1 on: December 31, 2014, 05:14:50 PM »
If the limit is triggering when homing then it is almost certainly bounce.
You could try setting a debounce interval (in General config) of 2000.
Hood

Offline c30232

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Re: Home Off Error X Axis
« Reply #2 on: December 31, 2014, 05:27:31 PM »
Thanks,

It seems to be unique to just the A axis and occurs when switches are swapped around.  It is also resetting the home-off int the home screen.  Is the reset an indication of bounce?     

Offline c30232

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Re: Home Off Error X Axis
« Reply #3 on: December 31, 2014, 06:00:41 PM »
The debounce seems to have fixed the rest issue. However the home-off remains off.  Not by much, but still off.  The X axis is on, the A is off.   

Offline Hood

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Re: Home Off Error X Axis
« Reply #4 on: January 01, 2015, 04:58:16 AM »
Are you looking at machine coords when reading the Home Off value?

Hood

Offline c30232

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Re: Home Off Error X Axis
« Reply #5 on: January 01, 2015, 05:29:08 AM »
Yes, positively.  I did make an error in reporting.  It is the A axis which has an issue.  All was fine and then we changed stepper drives.  That is when the issue surfaced.  Just t to eliminate the drive as the ghost we re-installed the old drives . . . same issue.  We swapped switches . . . same issue.  We swapped computers . . . same issue.  We rerouted the BOB . . . same issue.

The debounce was set at zero and changing it to 2000 seems to have solved the RESET issue.  However, the A axis home-off is in error and the field in the home screen changes to match the error number.  For example, if 1.00 is set and the resulting offset is .950 then the 1.00 is  automatically changed in the home screen to .950 inches

We have a number of scripts that rely on machine zero to sync with other offset movements.  Therefor it is important that all zeros actually represent zero.
   

Offline Hood

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Re: Home Off Error X Axis
« Reply #6 on: January 01, 2015, 05:33:13 AM »
If you attach your xml I will take a look and see if I can find the problem.
Hood

Offline c30232

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Re: Home Off Error X Axis
« Reply #7 on: January 01, 2015, 05:49:22 AM »
Thanks,

It will be several hours.  The Sun isn't due in for a bit.

Offline c30232

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Re: Home Off Error X Axis
« Reply #8 on: January 01, 2015, 12:40:24 PM »
Attached is the xml

Offline Hood

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Re: Home Off Error X Axis
« Reply #9 on: January 02, 2015, 07:35:54 AM »
Seems to be working fine here.
I have tried two ways to simulat it, first I set up hot keys to simulate the home switch inputs and used them to simulate the home inputs and when viewing machine coords the X homed to 2.1800 and the A to 2.1711.
I then disabled the home switches for X and A and then jogged the axes and again pressed RefAll and again they were set to the above values.

So afraid I am not seeing your problem here and dont know what to suggest.
Hood