[Febo00]

I'm having problems with tool radius compensation on a Fadal 4020FX with a Fanuc 0I MC control.

The machine wasn't used for some time and when I turned it on Error 306 of low battery an 300 of nth Axis ZRN were shown on the screen, which meant home position was lost. I changed the battery and proceeded position the machine and, changing bits of 1815 parameter and such. I mention this because it may be relevant to the cutter compensation issue.

Basically, the machine acts as if G42 and G41 were not present.
To be sure my code wasnt wrong, I made a simpler one to test if compensation was working. I placed a 140*140mm stock on the table and ran this:

%
N0010   G17 G80 G90 G43
N0020   G54
N0030   T9.9 (MILLING)
N0040   F1000 S800
N0050   M6
N0060   M3
N0070   G00 Z40.
N0080   G01 X-100. Y150.
N0090   G01 Z0
N0100   X0 Y80.
N0110   G01 G41 Y0. D9
N0120   M30
%

This is what simulation looks like:




Instead of a diagonal cut as expected, I get a straight cut. Exact same thing happenswhen replacing G41 with G42 or simply working without compensation.


I've tried everything and have not been able to reach a solution. Also searched for a paramater related to G41/G42 that might have been resetted when the battery depleted but there doesn't seem to be one.

I'm out of ideas!

[Riddersholm]

Your code looks off? The simulation is what you want correct?

I dont see any height comp or a D value to tell the G41 and G42 where to get its comp value from, have you run this machine with this type of code before and been all right?

[Febo00]

Yeah sorry about that,

Here is the whole code

%
O8067
G40 G43 G80 G17 G90
G54
T9 M6
H9
S800 F1000
M3
G00 Z40.
G01 X-100. Y150.
G01 Z0
X0 Y80.
G01 G41 Y0. D9
G00 Z100.
M30
%

All I want is the machine to compensate radius via G42/G41. And the fact that in reality I'm getting a straight, centered cut means its not doing it.

Also tried adding 2 o 3 more movements and made it go to X0 Y70
like this:

%
O8067
G40 G43 G80 G17 G90
G54
T9 M6
H9
S800 F1000
M3
G00 Z40.
G01 X-200. Y200.
G01 Z0
G41 G01 X-100 Y100 D9
X0Y70
G00 Z100.
M30
%

And instead of barely touching the outside of the 140x140mm workpiece, it enters with the radius, again meaning it didn't compensate.