DOOSAN Z290SM TWIN TURRET LATHE

[CHAD LAWSON]

I HAVE A DOOSAN Z290SM TWIN TURRET LATHE WITH A FANUC 18TC CONTROL. THE PROBLEM WE ARE HAVEING IS WE NEED TO SYNC THE MAIN SPINDLE WITH THE SUB SPINDLE AND WE TAKE HEAVY CUTS AT THE SAME TIME FROM BOTH TURRETS AT ONCE. THE LOAD ON THE MAIN SPINDLE REMAINS VERY LOW BUT THE SUB SPINDLE RUNS AROUND 180%. THE MACHINE HAS MCODES M62 AND M63 WHICH DICTATE WHICH SPINDLE IS HEAD ONE BUT THIS DOES NOT ALLOW ONE TO CARRY MORE OF THE LOAD. I WANT TO SYNC THE SPINDLE BUT MAKE THE LARGER MAIN SPINDLE TAKE THE TORQUE DURING THE CUT. WE WOULD NOT SYNC THEM BUT WE BAR FEED THE PARTS AND WHEN WE PART OF WE IMMEDIATLY CONTINUE PROFILING THE PART ON THE SUB SPINDLE WHILE PERFORMING A BORING OPERATION ON THE MAIN SPINDLE.