PCB drilling question

[[email protected]]

In commercial CNC setups, is the drill motor powered during the entire
drilling operation (except tool changes) or is it cycled on/off at each
hole location?

 

[Larry Brasfield]

In commercial CNC setups, is the drill motor powered during the entire
drilling operation (except tool changes) or is it cycled on/off at each
hole location?

When I saw that operation at a local board house, the
drill spent as about much time in the stack as out. There
was no pause to let the motor spin down and back up,
and I doubt any shop would do it that way.

 

[[email protected]]

I doubt any shop would do it that way

Me too. I foolishly went and bought a SSR with zero-crossing and
snubber circuitry for motor control in my CNC setup then realized that
even though X and Y speeds are slow at 20 IPM, it still probably didn't
justify cycling the power on/off at hole locations.