[billsnogo]

First off, new to the fadal control. I have set my tools that seems the most common with touching off the top of the part, and leaving the fixture z offset blank.

Decided to try and set my tool lengths off the table, and put in a fixture offset for the Z location. All worked out fine until the end of the program.
G00 Z1.25
Z1.255
M5 M9
G90 H0 Z0
E0 X0. Y7.
M2
%
I over travel on the z on the g90 h0 z0 line.
Then I decided to change it closer to the code to how my haas at work ends,
g91 g28 z0
g90
e0 x0 y7
m2
%

and it bringz the z up to home, but then comes back down on the e0 x0 y7??? Not sure what the heck is going on there.

I really don't care to set my tool lengths off the top of a part and have to change it with every op, or change of part, I much rather change the part offset.

Is there a way to do this without jamming into the end of z travel like it did for me? I know about the mass modify for tool lengths, and will do it that way if I have to, but really rather not.

thanks to anyone who can help

ps, machine setup to run format 2

[kla64]

Try this..

g49 g28 z0
M2

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[Techman]

Try shutting off z and fixture offsets all on the same line.
This works for me:
G0 Z2.0 M5 M9 (just above clamps and part)
X0 Y0 Z0 E0 H0 (turns off fixture and tool length offsets)
M2
I don't know if you can get away with a Y move on this line or not. We set up our machine in a similar fashion. a
All tool lengths are established from a tool length probe. The Z value in the fixture offset is usually the difference in distance from the probe to the top of my part.
Hope this long winded explanation helps!!
Jim

[billsnogo]

Try shutting off z and fixture offsets all on the same line.
This works for me:
G0 Z2.0 M5 M9 (just above clamps and part)
X0 Y0 Z0 E0 H0 (turns off fixture and tool length offsets)
M2
I don't know if you can get away with a Y move on this line or not. We set up our machine in a similar fashion. a
All tool lengths are established from a tool length probe. The Z value in the fixture offset is usually the difference in distance from the probe to the top of my part.
Hope this long winded explanation helps!!
Jim

Thank you. I tried your way and now it works without doing an overtravel. Very happy to program my tool lengths off the table and give the fixture z an offset, and now that has made it easier.

thanks again guys

[DareBee]

I had the same stupid brain buster a bunch of years back when i decided to start using Z offsets as well