Turning Center G40 G41 and G42

[jorgehrr]

Please help.

Is there any rule to apply when programming Tool Nose Radius Compensation on Turning Centers to avoid alarms in the beginning and when turning compensation off.

Thank you in advance.

George

[theemudracer]

Originally Posted by jorgehrr Please help. Is there any rule to apply when programming Tool Nose Radius Compensation on Turning Centers to avoid alarms in the beginning and when turning compensation off. Thank you in advance. George

Turn it on with a G01 move to the start point of the cut.

After you are done you have to feed out of the part on a G01, and turn it off on the same line.

For example
G0X2.1
G01 X-.03F.006
G0W.05X1.75
G42G01Z0.
G3X2.0Z-.125R.125
G40G01X2.1
G28U0.

[dcoupar]

... And be sure your linear move is larger than the R value in your offset.

[jorgehrr]

Thank you guys -

Nice and Simple.

[kolodok]

N10G0G90T1
M6
M1
M53 (rotary table unclamp)
N100G0G90G54X-.04Y1.04A0.S300M3T2(T2 next Tool)(We are running imperial only, so machine ist set)
M54(rotary table clamp)
(T1=1.0 CARBIDE ENDMILL OR INSERT CUTTER W/.250 RAD.)
(D40=1/2 TOOL DIA.)
G43H1Z2.5M8
Z1.34
G1Z.735F20.
G41D40Y.49F1.1(Problem in this line machine moves both axis x&Y,did not do it befor)
X13.11
G40Y1.04
G0Z2.5

We did run the program for 2 weeks,it was fine.But then the control started to comp. in two axis y&z, so we crashed the Machine,So called Fanuc support,they told as to wipe out the control(s-ram*****)We did that, it did fixed problem with z axis,but it still comp.x&y(did not do it before) we did try to add g40 in line n100 and it seemed like it took care of it,but not for long(for 3parts)The only thing fanuc guys told me(your prog. is wrong).Control we using is fanuc io-mc on Amera-Seiki machine.we have 3 machines same brand, same control hte other two doing ok. Any help would be great. Thanks

[jackson]

Originally Posted by kolodok N10G0G90T1 M6 M1 M53 (rotary table unclamp) N100G0G90G54X-.04Y1.04A0.S300M3T2 M54(rotary table clamp) (T1=1.0 CARBIDE ENDMILL OR INSERT CUTTER W/.250 RAD.) (D40=1/2 TOOL DIA.) G43H1Z2.5M8 Z1.34 G1Z.735F20. G41D1Y.49F1.1 X13.11 G40Y1.04 G0Z2.5 We did run the program for 2 weeks,it was fine.But then the control started to comp. in two axis y&z, so we crashed the Machine,So called Fanuc support,they told as to wipe out the control(s-ram*****)We did that, it did fixed problem with z axis,but it still comp.x&y(did not do it before) we did try to add g40 in line n100 and it seemed like it took care of it,but not for long(for 3parts)The only thing fanuc guys told me(your prog. is wrong).Control we using is fanuc io-mc on Amera-Seiki machine.we have 3 machines same brand, same control hte other two doing ok. Any help would be great. Thanks

Have you tried a G42 instead of the G41 not sure maybe that has some thing to do with it not real sure. The program looks ok, are you sure your indexer is not the cause????

[jmagnuson]

Originally Posted by kolodok N10G0G90T1 M6 M1 M53 (rotary table unclamp) N100G0G90G54X-.04Y1.04A0.S300M3T2 M54(rotary table clamp) (T1=1.0 CARBIDE ENDMILL OR INSERT CUTTER W/.250 RAD.) (D40=1/2 TOOL DIA.) G43H1Z2.5M8 Z1.34 G1Z.735F20. G41D40Y.49F1.1 X13.11 G40Y1.04 G0Z2.5

If this really is the beginning of your program, you never specify metric or inch (G21 or G20). (.735 mm is a whole lot less than .735 inches) Whatever is left over from the previous program it will still be stored.

Another thing noticed, what's that T2 hanging out on N100? It won't do anything without M06, but just curious if it was supposed to be used.

And another note, you need a G40 before an M30 or you'll get an error. Not sure if any of that helped you.

[jackson]

Originally Posted by jmagnuson If this really is the beginning of your program, you never specify metric or inch (G21 or G20). (.735 mm is a whole lot less than .735 inches) Whatever is left over from the previous program it will still be stored. Another thing noticed, what's that T2 hanging out on N100? It won't do anything without M06, but just curious if it was supposed to be used. And another note, you need a G40 before an M30 or you'll get an error. Not sure if any of that helped you.

i set my machine to inches one time so i dont have to tell it every program. and the T2 is just calling the tool up and getting it ready for the tool chang at the end of that tool. and i think you can have the G40 wear it is "i cant realy remember" i put it in the first line of the tool if i use it.

[jmagnuson]

Originally Posted by jackson i set my machine to inches one time so i dont have to tell it every program. and the T2 is just calling the tool up and getting it ready for the tool chang at the end of that tool. and i think you can have the G40 wear it is "i cant realy remember" i put it in the first line of the tool if i use it.

I only mentioned inches and metric thinking maybe you had done another job in between in metric which would explain why the other machines were working.

The program seems fine then. I'm used to Haas where it looks ahead for the next tool and changes the tool turret accordingly.

[jackson]

is your Haas a side mount tool changer????

[dcoupar]

Comped in Y&Z? Sounds like G19 might have been active. I don't see a G17 in your program anywhere...

[kolodok]

Question is does it have to comp. x&y in this case?