cutter offset

[mjb41847]

Is it always good pactice to use offsets for G54

or the G43 H1. Referance: when cutter to part are so close that offsets are compromised what is a good practice (according to the BOOK)use offset know matter what or us G54 and don't use G43H1. Can anybody give me a answer and tell me what book to read.

[Flycut]

You need both.

G54 is your part location and G43 is your cutter length offset.

[Bruce Caulley]

I have a confession to make:

 

I used to run an Arix 3 axis machine where I did my apprenticeship. It had no tool changer and instead had a bridgeport style head with a power draw bar. Since a lot of the work was semi manual I never used G43 height offsets as the Z value in the DRO only displayed H1 values. I used G54-G59 for my tool offsets so the Z in the DRO was relative to the actual tool I was using.

 

MJB, using the G43H? values is considered proper. Any time I have seen something else done it was due to machine/operator/job quirks as above. Using the G54-G59 only gives you 6 tools anyway.

 

What machine are you using?

 

Bruce

[mjb41847]

Nomura

my boss corrected the way I did it with G59 0.000

and G43 H1 -1.565 I left out the G43 h1. Just wanted to know the right way to do it. Just because he is the boss doesn't make it right.

 

thanks for the help but you here of any good books let me know.

[Guest CNC Apps Guy 1]

A good practice is to touch off your tools to a common place/height that does not change, like a gage block off the table, the fixed part of the vise jaw (not moving side), vise bed, tool setter, etc.... Then your G5x is the distance from the fixed point where you touched off your tools to wherever your part Z origin is (+ or -). This allows you the most flexibility and the ability to run multiple tools in different jobs on different fixtures.

 

HTH