last turret position Fanuc

[duenasg]

Good day. Is there a way to know what was the last turret tool position used? I am trying to write a macro to know which way I have to turn the turret based on the last turret index position. For instance, if the last tool on the turret used was on index 5 I need to go back to index 3 clockwise but if the last tool used was on index 7 I cannot go counterclockwise to turret index 3, I have to go clockwise in order not to damage my work piece setup. I am installing a tool on turret index 7 that will retrieve the work piece, if I go counterclockwise it will feed the piece in the wrong position and if I go clockwise it will do the job. I have tried doing it via calling the two prior tools manually so it feeds correctly when I physically see or know the last tool in the program but if I let the machine select the direction of the rotation it goes either way so I loose control of the piece position. Thank you in advance for your help.

[drdos]

This can be done easily in the ladder. It is possible by modifying the ladder to only rotate the turret in one direction Can you post the ladder?

[deadlykitten]

hy duenasg ain't it possible to use a more distant home position, where to index the turret safe ?

i don't know fanuc codes for cw, ccw or shoterts path, as for that i think drdos can help you

few years ago i created an okuma code for colision proof dynamic indexing, and is able to detect in-between indexing posts, with a particular case for opposed ones (those located at 180*), but that should not be a worry if your turret is odd

if you wish, i will share it, you could get the idea and implement it for fanuc

whatever you do ( macro or ladder ), you will not be covered at the 1st index within the program, as for that you will need a system variable for current turret position, or visual inspection before pressing cycle start / kindly

[servtech]

Good day. Is there a way to know what was the last turret tool position used? I am trying to write a macro to know which way I have to turn the turret based on the last turret index position. For instance, if the last tool on the turret used was on index 5 I need to go back to index 3 clockwise but if the last tool used was on index 7 I cannot go counterclockwise to turret index 3, I have to go clockwise in order not to damage my work piece setup. I am installing a tool on turret index 7 that will retrieve the work piece, if I go counterclockwise it will feed the piece in the wrong position and if I go clockwise it will do the job. I have tried doing it via calling the two prior tools manually so it feeds correctly when I physically see or know the last tool in the program but if I let the machine select the direction of the rotation it goes either way so I loose control of the piece position. Thank you in advance for your help.

Pretty sure there is an M code to prevent shortest path to the next turret tool position. Older Fanuc used M17 and M18.

If that doesn't work, you may find there is a "bit select" you can set for omnidirectional or bidirectional control.

If M codes works just use it as required before the next tool call. Bit select may need a different tool call.

[duenasg]

Thank you all for your assistance. I will provide code if necessary but I will try M17 and M18.