Model GPX.DC Dual Chamber
Disc Style Coffee Grinder
H:\DATA\WORD\MANUALS\Coffee\GPX-DC Manual Revised 05-25-07.doc
OVERVIEW
The Model GPX.DC Dual Chamber Disc Style Coffee Grinder has two
grinding heads, driven by a common motor, to produce different flavors, blends, or
roasts of coffee without the need to clean out the grinder between runs. Each head
utilizes a pair of precision cut "diamond hard" grinding plates to produce up to 400
lbs per hour of a full range of coffee grinds. The grinder utilizes a 5 HP (1200 RPM)
motor to drive dual rotors, each with an auger feeder and a rotating grinding disc.
The rotor also incorporates turbo vanes to maximize throughput and minimize
product accumulation within the grinding head.
The gap between the rotating grinding disc and the stationary grinding disc
(mounted directly opposite the rotating disc, on the grinder housing) determines the
type of coffee grind produced. Turning the grind adjustment knob sets the gap
between the grinding discs and provides the capability of "dialing in" any one of a
full range of coffee grinds, from drip to espresso.
On "American" style coffees, it may be necessary to utilize the dechaffer on
the GPX grinder. By utilizing the weight on the dechaffing arm, back pressure is
exerted on the coffee being expelled from the grinder, thereby breaking up the
"chaff" (broken coffee skin) which is released when the bean is ground. By moving
the weight outward on the dechaffing arm, the back pressure and the resulting level
of dechaffing is increased. When producing very fine coffees (melitta, espresso,
turkish), the dechaffing level should be minimized or, in some cases, eliminated by
removing the weight.
Each grinding head is operated separately; it is not possible to grind using
both heads at the same time. Automatic feed gates are included on each grinding
head, the gates open and close automatically to supply coffee to the grinding head
that is in use.
PRIOR TO OPERATION FOR THE FIRST TIME
Motor rotation should be checked prior to operation for the first time.
1. Open head #1 gate using the switch on the control panel.
2. Press the “Head 1 Grinder Start” button.
3. The head should rotate clockwise as viewed from the head #1
discharge end. The rotor can be seen by looking down through the
open slide gate.
