Hello All,

Had really an awful day machining yesterday. Long story short, I was running an HSM toolpath; 1/2 Carbide 3-Flute; .5" DOC, .075" WOC, 50 ipm (I forgot what I calculated, so i'm off on this particular feed). Beautiful chips, low noise...great material removal rate. That is until I made an error in the amount of stock and forgot about the last depth of pass when the end-mill drove the 6000 Carbide Endmill into at least 1/2 of stock, full slot.

Needless to say, the Spindle bogged down, and before the tool broke in half...the Servo driven table continued moving to the point where my Spindle Head shifted due to the force.

If the Head didn't rotate, maybe something else would have broke.


My question, is anyone using a specific torque for the two bolts that hold the Spindle Head Assembly to the Z-axis column. If something like this happens again, I would ideally like for the Head to rotate in such a situation (which it did) though I am surprised my x-axis servo did not overload and trigger the E-Stop.

Was a bad day, but could have been worse.

Regards,

-Jason