unwanted g43 in nc file

[sgault]

i'm unfamiliar with editing posts so i'm not sure if i'm in the right area or not. i'm using mastercam x3 and the generic fanuc post. the problem is the nc file ends up using g43 for tool offset and i don't want it there, (it doesn't work for my machine) is this a post issue or a setting in mastercam that needs changed? and where do i look for and what do i change in the post or mastercam, whichever is the culprit. thanks for any help.

[Superman]

What Gcode do you use for taking up the tool length offset ?
Does your machine alarm if it (G43) is used by itself ?

G43 on it's own should error, Fanucs do use G43 H ( Htable # )
ie G43 H5 Z1. ( add tool length in Z, from table H#5 , and rapid the tool point to Z1.0 (mm or inch-depending on your programming units) above the Z datum ), a Z(value) is not required on this line but will be taken up on the next Z move, G43 also forces rapid motion.

The value in that Htable # is added to the reference tool length to enable you to use tools set to different lengths

Along the same lines is the Dtable # holding different radius compensation values for each tool syntax is G41 or G42 D# and both are cancelled by a G40

Most programmers use a standard config of utilising the same # as the tool number for length and radius comp.
ie Tool #1 uses H1 for tool length and D1 holds the tool radius comp.

this is not set in concrete, but it is good to know what to expect from the programmers if you were the toolsetter or operator

imagine the confusion
if T11 uses H15 and D43
and T51 uses H21 and D11

[sgault]

i don't have to use tool length offset for my machine. i have to set Z depth with every tool change. as for cutter compensation i am using mastercam and it is all taken care of in the program. i don't remember for sure if it causes an alarm when i run it because i always take a look at my g code looking for problems before i run it. What i don't want is for my machine to use the tool length offset and gouge the part. you are right also, it is a "g43 H "
After i posted my question i got to thinking, i was using mastercam X and had this problem cured so i think i will try substituting the post i used with it for mastercam X3. should work i think. thanks for the help. if it works i'll post it later in this thread to maybe help others later.
thanks again

[Superman]

Yuo could still use a program with G43 H in it but the values would all need to be set to ZERO (ie. nothing to add or subtract would be the same as actually deleting the code )

Your programs would still be functional on someone else's machine that do use the tool length offset function

I would guess to say that if you changed tools, you have to re-post the program ??

[sgault]

for anyone that may look at this trying to solve the same problem here is what i did. since i had a post from mastercam x that worked as i wanted (i think i had someone tell me what to remove before) i just opened both posts and compared them, removing all references to g43 in the new post that wern't in the old post. then i saved my work. i tried reposting my g code and all references to g43 were gone. if you try this make sure to save a copy of your post so if you run into problems you aren't totally without.