Barranca Diamond FIREBALL 2 AXLE SPHERE MACHINE - Manual (Page 8)

Barranca Diamond Fireball Sphere Machine Manual Effective Date 9/28/06 
PRE-START INSPECTION
Once the Fireball sphere machine has been uncrated and the caster wheels installed on the frame legs,
position the machine in a level work area. Prior to attaching the desired set of sphere diamond grinding cups
to the fixed and moveable heads determine which size cups to use based on the rock material diameter to
be ground into a sphere shape. The preparation of the rock material can be performed by slab sawing a
cube into a 26 faced pre-formed block shape or diamond drilling (core drilling) a cube 3 to 4 cuts to remove
material prior to grinding the 8 high points on a bench grinder or angle grinder to as close a sphere shape as
possible.
A pre-start power test should be performed before attaching the sphere grinding cups by attaching a power
cord (extension 14 gauge) to the male plug attached to the aluminum ON/OFF lever switch box. Turn ON/OFF
lever to the ON position and open the power Baldor Adjustable Speed Drive controller cover to access the
front panel of the drive controller. The button marked FWD (forward) should be pushed first to engage power
to the grinding cups through the motor to gear box to grinding heads.
Drive Controller & Switch Box Drive Controller Front Panel
Press the button marked (UP arrow) to increase the grinding head rotational speed from a low of
50 RPM incrementally in steps to 115 RPM. The use of the button (DOWN arrow) will incrementally
decrease the grinding head rotational speed as well. Because of the 10 to 1 gear reduction and 33% pulley
reduction the actual shaft RPM is as follows: Display RPM x 0.1 (gear reduction) x 0.33 (pulley reduction). For
example, 1249 RPM on the display will result in a shaft RPM of 41.2. To shut off power and rotational speed
to the grinding heads push the button marked STOP and this will reduce the grinding head rotational speed
to zero at which time the power toggle switch ON/OFF lever should be turned to the OFF position. Once the
lever on the aluminum power box is put in the OFF position all power to both the Baldor Adjustable Speed
Drive-Motor-Grinding Heads and submersible pump (if hooked up to the auxiliary plug receptacle) will be shut
off.