Need Help!- Disable adjustable feedrate on 0M controller?

[walshsimmons]

Hello,

Is there a G or M code that can disable the adjustable feedrate on a 0M controller? The operators slow the programs down to a snails pace.

Thanks,[/

[cnc2149]

FANUC doesn't provide an M/G code to disable the feedrate override but there are a couple of methods to implement it.

1. PMC Ladder
Define an M code to activate the OVC (G126.4) bit in the PMC Ladder to disable the feedrate override. You would probably want to define an additional M code to release the OVC bit. This method requires implementation by someone with the knowledge and equipment to edit the existing ladder and burn new EPROMs.

2. #3004 System Variable
You can define an unused G or M code to manipulate system variable #3004 to disable the feedrate override. A shrewd operator can get around this. Also, #3004 is automatically reset to 0 at every power up.

The following are example macro programs to allow M50 to disable the feedrate override and M51 to enable the feedrate override. You can use other unused M codes as these are just for illustration.

Assign the M codes to macro programs:

par 0230 = 50 (M code to disable FRO)
par 0231 = 51 (M code to enable FRO)


O9020 (M50 DISABLE FRO)
#3004 = 2
M99

O9021 (M51 ENABLE FRO)
#3004 = 0
M99

[sinha_nsit]

Can just insert #3004 = 2 in the beginning of the program, assuming this variable is available on this control. And lock the program-edit function.
A value of 3 would disable feedhold also.