About Z accuracy when changing bits

[bonmotwang]

Still waiting for my machine. But while I was reading the posts in this forum, one question came up, after roughing, what is the best way to make sure the finer bit I put on will match the center point of the roughing bit?

[CNC Lurker]

Will your machine be running Mach 3? If so, you can get the Mach 2010 Screenset which will let you easily recalibrate the Z axis after a tool change YouTube - Mach3 2010 Auto-Zero

Not only is this a beautiful screenset, you can't beat the $20 price: Mach3 2010 Screenset LINK

[Boltz]

The center point will always line up! If the diameter of the finishing bit is different, an offset or cutter compensation will need to be made.

And of course, the end of the cutter needs to be zeroed, as previously mentioned.

-Jim Hart

Originally Posted by bonmotwang Still waiting for my machine. But while I was reading the posts in this forum, one question came up, after roughing, what is the best way to make sure the finer bit I put on will match the center point of the roughing bit?

[bonmotwang]

Nice. I thought they could have made up a piece of hardware linked to the computer using a pressure sensor :-D
I am an embedded system designer, so always thinking about being lazy :-D

[CNC Lurker]

With the post titled "About Z accuracy when changing bits", I was under the impression you were asking about Z height after changing bits.

Is your question about making sure the Z height is correct, or is your question about making sure your X & Y axis remain the same?

[bonmotwang]

I wanted to make sure X, Y and Z. :-D