G91 G28 Z0. M5

[1320feet]

I have an fanuc 0i-mb control that stops the spindle while traveling to Z0 for a tool change. I also have a fanuc 18i control that does not stop the spindle until Z0 is reached.  Is there a parameter for this?

 

Thanks

Howard

[Reko]

Actually, it is strange that the Oi-mb stops the spindle while traveling to Z0 for the tool change.

 

If you have all of that  code on one line...

 

G00 G91 G28 Z0 M05

 

...a Fanuc will always read the M code last... that is why it gets to tool change position before the spindle turns off last.

 

So, if you want to turn the spindle off prior to it reaching tool change position then change your post to output this:

 

M05

G00 G91 G28 Z0

[djstedman]

If this is a Fanuc thing I don't think its the same on all Fanuc's, we used to have Robodrill's at one place I worked and we have a Daewoo where I am now and we always had the M5 in the same line to keep from waiting for it to spool down to zero before going home - which is what we got with code like the second example you posted.

 

That said I have no idea why different machines would have different behavior.

[1320feet]

I like that the spindle is slowing down on its way for a tool change, saves a few seconds on a tool change.

[1320feet]

Actually, it is strange that the Oi-mb stops the spindle while traveling to Z0 for the tool change.

 

If you have all of that  code on one line...

 

G00 G91 G28 Z0 M05

 

...a Fanuc will always read the M code last... that is why it gets to tool change position before the spindle turns off last.

 

So, if you want to turn the spindle off prior to it reaching tool change position then change your post to output this:

 

M05

G00 G91 G28 Z0

Both of these controls will start the spindle and move x and y at the same time. G0 G90 G54 X6.665 Y-.529 S5800 M3

[Rstewart]

Actually, it is strange that the Oi-mb stops the spindle while traveling to Z0 for the tool change.

 

If you have all of that  code on one line...

 

G00 G91 G28 Z0 M05

 

...a Fanuc will always read the M code last... that is why it gets to tool change position before the spindle turns off last.

 

So, if you want to turn the spindle off prior to it reaching tool change position then change your post to output this:

 

M05

G00 G91 G28 Z0

 

That isn't what I get...

 

G91 G28 Z0.0 M05 on my Haas will retract to home and Then stop the spindle.

 

G91 G28 Z0.0 M05 on my Mori will execute the spindle stop as the spindle retracts simultaneously.

 

Saves a Little bit of time on the mori, and just looks funny on the haas.

[AMCNitro]

My old boss used to jump on the machines while we were running them(I used to HATE that, hes not a machinist) and delete the M05s on the Haas, and that saves some time, and the machine works fine.  The way our post was set up it would put the M05 BEFORE the G91 line.  Ive never tried it with the M05 on the G91 line, but now I will.

[mkd]

My old boss used to jump on the machines while we were running them(I used to HATE that, hes not a machinist) and delete the M05s on the Haas, and that saves some time, and the machine works fine.  The way our post was set up it would put the M05 BEFORE the G91 line.  Ive never tried it with the M05 on the G91 line, but now I will.

same thing with the m09. Haas will automatically shut off, just before the change, and re-activate after.