Hey cnc gurus. I have a graziano sag-12 that I am converting over to cnc control. I plan on running mach 3 for the software and either servos or closed loop steppers for the z and x axes. I am wanting to fabricate a 6 or 8 position tool changer. I was looking to go with either a pneumatic locking with a hirth coupling with a cl stepper or servo or a harmonic drive with a cl stepper or servo.
My question is: Would a harmonic drive hold up to the pressures exerted on the tools without any movement? Any insight would be appreciated.

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