Fanuc tool offset behaviour

[cdmurphy]

Hello all,
I'm trying to find out if there is any way to change the tool offset behavior of a Fanuc 10M based milling machine. As it is now, every time I command a G43 Hxx, the head instantly moves to correct the position by the offset amount. As you can imagine, this significantly increases the pucker factor when working on this machine. It doesn't matter if I'm in G90 or G91, or whether I also give it a Z value. What I want is for the offset amount to simply shift the coordinate position, or wait until a z move is commanded. I've looked all over the parameter manual for this control, and I can't find anything that seems to address this. There are two parameters, LGT and LWT, #60000 bit 2 and 3 that seem apparently address this, but the manual says they are only for the 10T/11T/12T series of lathe controls. I've tried setting them anyway, but they didn't have any apparent effect.

Anyone know what I'm missing? or is this just not possible on this vintage of control?

Thanks,

Cameron

[dcoupar]

You should double check your manual. My 10MA manual shows that LGT and LWT are in 6001, not 6000. They are listed the same in the 10TA manual.

As a last resort, always include a Z coordinate when you command a G43 Hxx.

[stevo1]

I have never seen a parameter setting to eliminate this. What you have to do is use a Z value in the G43 line that will stop the tool from moving. Because you will have to use variables I like to put the G43 in the tool change macro if you have one. This also helps from having to put it in the hard code and eliminates any fat fingering of the proper H().

You first need to capture what your tool geometry is for the tool that you are calling. So if you are calling T5M6 then #4120 will be equal to 5 because #4120 is the variable for the modal T. #2000 and #2200 are your geometry and wear for your tools. #2005 is tool 5. I set all of these to a variable. #5043 is your current machine position in Z
#100=#[2000+#4120]+#[2200+#4120]—sets #100= to the geometry + wear of the tool being called
G43Z[#5043-#100]H#4120---activates tool length with no tool movement

Stevo

[sinha_nsit]

Can also use #10000 and #11000 series for 400 offset numbers.