1. Check for a bent Drill.
2. Be sure the drill does not extend from the Drill Collet any further than necessary to create the correct depth of the hole.
3. Check the length of the cutting edges of the Drill at the drill point to be sure they are the same length.
4. Be sure the Feedrate is not too high causing the drill to deflect or bend.
1. Check the Spot Drill which precedes the Drill to be sure it is not broken, chipped or dull.
2. Check the Drill collet to be sure it is not dirty, broken or has burrs.
3. Make sure the Drill Collet Nut is securely tightened.
4. Make sure that no CRC value is active.
5. Check the programmed coordinates for each drill.