[Path]

I am justing beginning to learn G code for a Haas mill.

I'm using a .4375" HSS reamer, speed 700 rpms at a feed rate of 5"/min., material is 12L14.

Code is

N10 G01 Z-0.7 F5.
N20 G00 Z.1

In manual reaming the method it's slow in and slow out (as I recall).
It seems to me that the G00 Z.1 will bring the reamer out at rapid rate.

So the question is ... should the code really be:

N20 G01 Z.1

I don't have the machine right now so I can't run a quick test.

Also are the RPMs and Feed rate about right?


Thanks in advance.


Pat H

[Mitsui Seiki]

Do it like this.

N10 G01 Z-0.7 F5.
N20 Z.1

[theemudracer]

If you have a decent tolerance you can rapid out of the hole, assuming everything is rigid and you have no part flex. We do it all the time.

[M-man]

yes, rapid on the way out, if the tool will leave a mark, it would leave the mark with g1 too, so then fix that problem instead.. TIR and so on..

[cnc-king]

why don't you use a G85 or G86 command instead
G98 G85 Z-.7 F5.
G80

[Path]

Thanks for the help....

I tried it several ways and in my application it doesn't seem to matter.

The holes look good ... no marks.

Pat H

[sluggo]

I'm with CNC-King use a can cycle. If your new to programming read a little about them in your manual, they will save you a bunch of time.