Trouble shooting (DRV / DRX / DRZ / DRX) Toolholder DRX Trouble shooting (DRV / DRS / DRZ / DRX) Trouble condition Condition Cause Countermeasures There is no problem for inlet, Chip jam Change the cutting conditions A (Inlet side) however gradually hole diameter (External or internal edge chip stuck) · Increase the cutting speed is getting smaller at the bottom. · Lower the feed rate Hole diameter becomes smaller (At hole bottom) A>B B (Bottom side) There is no problem for inlet, Internal edge chip jam. Change the cutting conditions A (Inlet side) however gradually hole diameter · Increase the cutting speed is getting larger at the bottom. · Lower the feed rate Hole diameter becomes larger (At hole bottom) A