position the linear feedthrough rod 16 including the teflon u00ae coated steel probe tip uses only horizontal motion to process the packed precursor powder eject the empty cartridge and load a new packed cartridge into position in theory the probe can complete all of the required actions by cyclically traversing a distance that is just slightly longer than the length of the cartridge the cutting means can be a grinder assembly centered around a tiny steel cube attached to the end of horizontal arm 14 as the linear feedthrough rod 16 pushes the packed precursor powder from the packed cartridge into the grinder assembly the packed powder is ground into fine sub micron powder particles by a pair of steel blades revolving inside the steel cube at approximately 3000 rpm the blades are secured to the shaft of a high speed rotary motion feedthrough by two halves of a cylindrical blade holder assembly the shaft of a brushless dc motor is attached to the feedthrough via standard flexible shaft coupler and set screws while the body of the motor is supported by an adjustable l bracket motor mount rotational speed is controlled through a potentiometer built into the body of a outboard driver box powder particles are.