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Author Topic: Always need to zero "Z" a 2nd time, Why?  (Read 2001 times)

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Always need to zero "Z" a 2nd time, Why?
« on: July 13, 2012, 03:52:12 PM »
Hey guys,  Mach 3 runs great for me with 1 exception.  It does this every time.  I always need to zero the Z axis a 2nd time.  For example, when I touch off the top of my work piece, zero out Z on the DRO, then start the run cycle, Z will go from about 100.000 or so instead of from its relative location from where I touched it off.  I repeat the whole process again,  touch off, zero out DRO....etc..  and it's fine.  Always takes that 2nd time.

Any ideas on why?

Offline Hood

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Re: Always need to zero "Z" a 2nd time, Why?
« Reply #1 on: July 13, 2012, 04:15:04 PM »
Tool offset being called? Work offset being called?
Hood
Re: Always need to zero "Z" a 2nd time, Why?
« Reply #2 on: July 13, 2012, 04:21:15 PM »
Hello Hood,

Thanks for your quickness.  I will check those tonight after work.  If any value is in there, I'm assuming I want it zero.  I don't want offsets.   I place a thin piece of paper under the tooling, lower Z until I can't move the paper and zero it out. Just tedious when I have to do it twice.

Will post back later.

Offline Hood

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Re: Always need to zero "Z" a 2nd time, Why?
« Reply #3 on: July 13, 2012, 04:49:46 PM »
It could be for example you have a tool offset in the tool table and your code is calling the tool with the offset. For example you may have an offset for tool 1 in the table and your code is calling G43H1.
Likewise it could be a work offset, Mach usually defaults to G54 when you start but your code may be calling a G55 offset.
Hood
Re: Always need to zero "Z" a 2nd time, Why?
« Reply #4 on: July 13, 2012, 07:57:14 PM »
Well Hood, that's exactly what it was.  A tool offset.  It was at exactly 100.000.  I must have done this awhile back by accident.  I have no idea why it would be there otherwise.  All is good!

Thanks for the help.

Offline Hood

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Re: Always need to zero "Z" a 2nd time, Why?
« Reply #5 on: July 14, 2012, 03:53:57 AM »
Good you found it :)
Hood