FANUC O-M CONTROL

[ARP]

Just wondering if anyone can tell me what parameters to set/check on a Fanuc O-M control to do rigid tapping (if it is possible?). We don't have any tapping heads for the CNC so I would have to put the tap in an endmill holder. I have done some trial runs without a tap and everything SEEMS o.k. but any help is appreciated before I sacrifice a tap and/or block.

 

ARP

[Guest CNC Apps Guy 1]

Sorry, don't have a parameter book for the O control.

[T_MALENA]

ARP,

WE HAVE A EXCEL MILL WITH A FANUC O-M CONTROL. WE DO RIGID TAP ON THIS MILL ALL THE TIME. I DID LOOK IN THE PARAMETER MANUAL & DIDN'T SEE ANY REFERENCES TO SETTING PARAMETERS TO RIGID TAP. THIS MAY BE A SETTING THAT THE MACHINE TOOL COMPANY SET(MAYBE SOLD AS A OPTION). I WOULD THINK IF YOUR MILL IS NEWER IT WOULD HAVE RIGID TAP ON IT. SO GO FOR BROKE AND TRY RUNNING A TAP. TRY A 3/8 TAP AT APX. 300RPM. I'M SAYING THIS BECAUSE A GENIUS IN THE SHOP

TRIED TO TAP A HOLE ON A MILL WITHOUT RIGID TAPPING, ALL THAT HAPPENED WAS THE THREADS WERE LOOSE. UNFORTUNATELY HE RAN ALL THE PARTS THAT WAY.

SO TRY A COUPLE HOLES & DEPTHS. GOOD LUCK.

[jeff]

set parameter #076 bit 3 to a 1.

Use a G84 for the cycle and specify an M29 on the line before the G84.

Hope this helps.

I use this alot,but have to go slow on the rpm's because the spindle doesn't slow down fast enough when it reaches Z zero.

I would shy away from taps smaller than 1/4".

Unless you are feeling brave.

[HEAVY METAL]

We have a Tree mill with this control and the spindle revs up at end of g84 cycle before it reverses. The tap coasts another three to four threads. So for this reason we use floating holders. I dont think this machine is rigid tap enabled. Just started playing around with this new(used) machine.

[Threept82]

I had a Miyano with a 0M control.

and to rigid tap i had to add the rpm to the M29

line as well as the M3 line.

 

G0 X__ Y__ S400 M3

G43 Z__ H__

M8

M29S400

G84.............

[ARP]

What does the M29 do?

 

ARP

[Lathe-Mill]

move to location through g28 ref.point

[Guest CNC Apps Guy 1]

M29 probably turns on Synchronus feed if I had to guess.

[SLJ]

M29 specifys rigid tap.