GPX Manual - Modern Process Equipment

Model GPX Precision Disc Style Coffee Grinder
Model GPX
Precision Disc Style Coffee Grinder
Modern Process Equipment, Inc.
Chicago, Illinois
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
OVERVIEW
The Model GPX Disc Style Coffee Grinder utilizes 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 3 HP (1800 RPM) motor to drive a rotor, which
incorporates an auger feeder and a rotating grinding disc. The rotor also
incorporates turbo vanes to maximize throughput and minimize product
accumulation within the unit.
The gap between the rotating grinding disc and a stationary grinding disc,
which is mounted directly opposite on the grinder housing, determines the type of
coffee grind produced. The machine’s grind adjustment knob utilizes a screw
assembly and thrust bearing to vary the position of the rotor on the motor shaft and,
consequently, adjust the gap between the grinding discs. This disc gap variance
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
your 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.
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
OPERATION AND MAINTENANCE
Because of its uncomplicated design, the GPX grinder is relatively simple to
operate. Prior to starting the grinder, ensure that the coffee bean control gate is
fully closed. To grind coffee, simply start the grinder, fill the hopper with the desired
amount of beans, set the dechaffer arm weight, "dial in" the desired grind on the
grind adjustment knob, and open the bean control gate. As a starting point, the
dechaffer arm weight should be set at 1/2 the arm distance for medium to coarse
grinds, and at the bottom of the arm (fully toward the machine) for finer grinds.
When the grinding run is complete, close the control gate, lift the dechaffer arm to
remove any excess coffee, and shut down the grinder.
NOTE
TO REMOVE ANY COFFEE BUILDUP ABOVE DECHAFFING GATE, SWING
THE DECHAFFING ARM UPWARD UNTIL IT IMPACTS ON THE “KNOCKER”,
AS SHOWN IN THE DRAWING BELOW.
DO NOT PUSH OR FORCE HANDLE DOWN
DECHAFFING
GATE
DECHAFFING
ARM
DECHAFFING
GATE
DECHAFFING
ARM
KNOCKER
KNOCKER
NORMAL OPERATING POSITION
CLEANING POSITION
To change the grind range on the grind adjustment knob, loosen the knob
set screws, rotate the adjusting screw in the middle of the knob (Clockwise=Finer)
to the desired point, and retighten the knob set screws.
CAUTION!
LOCK OUT OR DISCONNECT MOTOR PRIOR TO ATTEMPTING WORK,
REPAIR OR REMOVAL OF COVER FROM THIS UNIT.
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
On occasion, the grinder will require disassembly for cleaning and/or
grinding disc replacement. To disassemble, remove the front cover after first
removing the (3) front cover screw knobs. After the front cover has been removed,
the rotor can be pulled out either by hand or by utilizing "ejector screws" on the
rotor insert (part #4 on drawing SG-1206-B) which, when screwed in, act against
the motor shaft to force the rotor out. Refer to drawing SG-1206-B for further
details on the internal construction of the grinder.
NOTE
PRIOR TO OPERATING THIS UNIT, ASCERTAIN THAT THE (3 PHASE) DRIVE
MOTOR IS OPERATING IN A CLOCKWISE DIRECTION (FROM THE MOTOR
SHAFT END).
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Drawings
GPX Store Grinder on Stand
GPX-B Store Grinder Bench Model
Model GPX Disc Style Grinder Parts List
5-10 HP, Starter/Wiring for GP-140/GPX Grinder
Single Phase 230V Diagram, GPX 3 HP. Starter
Three Phase Full Voltage, GPX 3 HP. Starter
Model GPX Disc Style Coffee Grinder With Parts List
Rev. 10/01/02
SG-1204B
SG-1205B
SG-1206B
EL-1520D
EL-1521B
EL-1522B
SG-2520C
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Rev. 10/01/02
Model GPX Precision Disc Style Coffee Grinder
Burr Installations
When installing reconditioned burrs
add one shim to back of each burr.
Rotating Burr
Stationary
Burr
When installing new or
reconditioned burrs make
sure the mounting surfaces
are clean
If rotor is stuck on the motor
shaft, insert two threaded
rods to break the rotor loose.
Zero Adjust Procedure
GRINDER SETTINGS
DECAL
ACTIVE GRIND RANGE
CO
SE
AR
3
4
5
6
7
FI
NE
10
1
9
2
8
ADJUSTING
KNOB
ADJUSTING
SCREW
LOCKING
SCREWS
Rev. 10/01/02
1. After fully assembling grinder, turn
grinder on.
2. Loosen locking screws
3. Rotate the knob to grind setting No. 10.
4. With a screwdriver turn adjusting screw
clockwise until burrs touch lightly.
5. Tighten locking screws.
6. For GPX grinders turn knob
counterclockwise to grind setting No. 8,
For GPC grinders turn knob
counterclockwise to grind setting No. 9.
7. With a screw driver hold the position
of the adjusting screw, then loosen
the locking screws.
8. While still holding the position of the
adjusting screw, turn the knob to grind
setting No. 10.
9. Tighten locking screw.
10. The grinder is now adjusted to the
original factory settings.
Download PDF
Similar pages