G81 Spindle Reversal Between Each Hole

@Aciera
Pecking too small takes too long but I'mma give it a try, my setting was about 1.5 diameter first peck then reduce 2-3 mm till reach 0.25 diameter

Darium wrote:

@Aciera
Pecking too small takes too long but I'mma give it a try, my setting was about 1.5 diameter first peck then reduce 2-3 mm till reach 0.25 diameter

Sounds like a good idea, it's amazing how often eyeballed numbers lead to good results.

But make sure you test it just to ensure it workswell in reality.

Pecking in tiny increments may be slow, but so is reversing the spindle all the time.

A combination of reversing and pecking is probably the best solution, though the peck/reverse ratio will have to be determined based on speed.

When we had a similar problem with stringy chips, drilling holes with carbide drill with trough coolant in CrMo4, a modified G83 cycle solved that. Only retracting by 0.2mm after 2mm. Continue this 2.2mm / retract 0.2mm  steps until 
final depth, we made all the 120 holes without interruption and big loss of time. I think feed was about 0.12/rev