Trojan GP-2000A is an automated grinder and polisher designed for metallographic specimen preparation. It features variable speed control for both the polishing head (0-200 rpm) and the base wheel (20-1000 rpm), allowing for precise adjustment to suit different materials and applications. The head can be operated independently or in conjunction with the base, providing flexibility for various tasks. Additionally, it has a built-in lubricant dispenser and high-flow water valve for wet grinding and polishing.
Trojan GP-2000A is an automated grinder and polisher designed for metallographic specimen preparation. It features variable speed control for both the polishing head (0-200 rpm) and the base wheel (20-1000 rpm), allowing for precise adjustment to suit different materials and applications. The head can be operated independently or in conjunction with the base, providing flexibility for various tasks. Additionally, it has a built-in lubricant dispenser and high-flow water valve for wet grinding and polishing.
GP-2000A Automatic Grinder and Polisher
User Manual
1
1. Product Description
The GP-2000A is a variable speed polishing head (0-200 rpm) for use with the
grinding/ polishing base machine for automated metallographic specimen
preparation. It can also run either automatically with the polishing base or in a
manual mode with independent control.
Polishing Head
Head Control Panel
Dispenser unit
Water Valve
Working Wheel
E-Stop Button
Base Control Panel
Polishing Base
Head Locked Lever
Sample Holder
2
1.2 Technical Specifications
Electrical specifications: 110V single-phase ,60 Hz
Number of specimens: 1-6 samples (less than 1-1/2inch diameter). 1-3 samples
（2-inch diameter）
Diameter of specimens: 1-1/4 inch
Force application: Individual piston
Force adjustment: 0.1~0.5MPa （with an air pressure regulating valve）
Head motor power: 125 W
Base motor power: 750 W
Base working wheel: 10 inch
Head speed: 0 to 200 rpm variable speed
Base wheel speed: 20 to 1000 rpm variable speed
Weight: Approx. 85 kg (187LBs)
Dimensions (WxHxD): Approx. 27.5 inch x 29.5 inch x 27.5 inch (700 mm x 750
mm x 700 mm)
3
1.3 Features and Benefits
The GP-2000A is equipped with a 125 W variable 0-200 rpm speed motor. The
drive mechanism is connected to the motor via a maintenance-free anti-slip
polychain.
The GP-2000A also has a lubricant dispenser in addition to a high flow water valve
for hands free wet grinding with abrasive papers and lubrication for polishing.
In addition, the GP-2000A can be operated either automatically or independently
of the polishing base.
4
2. Installation
Install unit carefully! The GP-2000A should be placed on a flat stable surface.
Requires air, water supply, drain and electrical connections. After connecting air,
water, drain and electrical supplies the system is ready for operation by activating
the main power switches on both the polisher and head for automatic operation.
After connecting air, switch the locked lever to “a” position, the head will lift up,
then you can swing the head to the left or right side. Move the lever slightly away
from “a”position, the head will fall down. Continue to push the lever to
“b”position by force, then the head will be locked.
In order to achieve better effects, the height from the sample holder to the
working wheel should be around 2mm. If the distance is not good, lift up the head,
then release the M5 screw on the Height Adjust Ring, and move the ring up or
5
down to get the proper height.
2.1 Backside connections
External air supply: It is recommended that the air supply be clean, filtered and
lubricated to extend the life and performance of the systems.
Electrical connection: Connect electrical power cable and communications
cable.
6
3. Heads Operation
Start / stop buttons: Start or stops the head in the manual mode.
Auto/ manual: Manual mode operates the head independent of the polisher. Auto
mode operates head in conjunction with the polisher.
Pistons control: UP/DOWN controls the pistons in the manual mode.
Head speed control: UP/DOWN arrows for increasing or decreasing the speed.
Head speed indicator: Displays the motor speed (0-200 rpm).
Pressure adjustment: Controls the pressure applied to the pistons.
Head Speed Indicator
Pressure Gauge
Pressure Regulating Valve
Piston Control
Head Speed Control
Start/Stop
Auto/Manual Mode
7
4. Base Polisher Control Panel
: Function key, press to display the function setting menu.
：Display the menu forward in turn, or increase the number.
：Display the menu in reverse order, or decrease the number.
：When setting the value, switch the number of digits.
：Enter button. When the function setting menu is displayed, press to display the
corresponding parameter value, and press to save the set value after modifying the
parameter.
8
：Control the water on and off.
：The operation mode of the working panel is auto mode, that is, there can be 8
sections of variable speed and the running time can be set.
：The operating speed of the working disk is the preset value of parameter SL.
：The operating speed of the working disk is the preset value of parameter SN.
：The operating speed of the working disk is the preset value of parameter sh.
：Set the operating direction of the working wheel to counter clockwise
：Set the working wheel running direction to clockwise.
：Speed up.
：Speed down.
：Start / stop.
9
5. Function menu description
Menu name
Description
Remarks
SP1
Speed 1. Unit: RPM
SP1 ~ Sp8, T1 ~ T8 are called
"8-stage speed" in this manual.
When t is set to 0, the
corresponding speed segment will
skip and not run.
To set the speed, press and
to increase and decrease the
speed value. Set the running
direction by pressing and
t1
Running time for speed 1. Unit: Second
SP2
Speed 2
t2
Running time of speed 2
SP3
Speed 3
t3
Running time of speed 3
SP4
Speed 4
t4
Running time of speed 4
SP5
Speed 5
t5
Running time of speed 5
SP6
Speed 6
t6
Running time of speed 6
SP7
Speed 7
t7
Running time of speed 7
SP8
Speed 8
t8
Running time of speed 8
Cn
Set the operation times of 8-stage speed. The operation
from SP1 to Sp8 is one time.
When this parameter is set to 0, it
will run until the stop key is pressed.
SL
Speed SPL. Low speed section
SPL, SPM and SPH are referred to as
3-stage speed in this manual. When
the operating mode of the working
disk is 3-stage speed, the speed in
operation can be changed
(increased or decreased) by pressing
and .
SLt
Timer for SPL. Unit: second. If set 0, it will keep running
until press the stop button.
Sn
Speed SPM. Medium speed section
Snt
Timer for SPM. Unit: second. If set 0, it will keep running
until press the stop button.
SH
Speed SPH. High speed section
SHt
Timer for SPH. Unit: second. If set 0, it will keep running
until press the stop button.
Sr
Set the transmission ratio between the motor and the
working disk.
This parameter can not be modified
at will, otherwise the speed display
will be inaccurate. Password is
required to modify this parameter
dF
Restore all parameters to factory default values.
U
Set the input voltage (110 / 220 V).
This parameter can not be modified
at will, otherwise the circuit board
will be damaged. Password is
required to modify this parameter
St
Set the protection temperature of frequency converter,
when it exceeds the temperature, it will stop
automatically.
10
Ct
Displays the current temperature of the inverter
nS
The number of poles of the motor.
Password is required to modify this
parameter
CD1
Set the start / stop control mode
0: through the panel.
1: It is controlled by inputting an
external signal. Password is required
to modify this parameter
CD2
Set the display content of LED tube.
10: Display speed.
1: Display frequency.
It is currently set to display only the
speed.
6. Trouble Shooting
Problem
Cause
Solution
No power or function
Unit is disconnected from main electrical
power supply.
Main power switch is off.
Blown fuse
1.Verify electrical source
and connection.
2.Turn on main power
switch.
3. Replace fuse
No air supply
Air regulator blocked
Clean air connections
Specimens not polished
evenly across sample
Specimen not breaking down grinding
paper uniformly.
Relative velocity of base and head does
not match.
Position specimen holder so
that specimen tracks over
the entire radius of the
grinding paper.
Match head and base speed
11
7. Electrical Drawings
Drawings of the head.
12
Drawings of the base
13
8. Schematics and Part list
14
15
16
17
9. Packing List
NO.
Name
Unit
Quality
Remark
1
Working wheels
Pc
2
2
Abrasive Disc
Pc
2
3
Polish cloth
Pc
1
4
PU 8, water inlet
Pc
1
5
1-inch ID water outlet
Pc
1
6
Power line
Pc
1
7
Instruction Manual
Pc
1
8
Packing list
Pc
1
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
Trojan GP-2000A is an automated grinder and polisher designed for metallographic specimen preparation. It features variable speed control for both the polishing head (0-200 rpm) and the base wheel (20-1000 rpm), allowing for precise adjustment to suit different materials and applications. The head can be operated independently or in conjunction with the base, providing flexibility for various tasks. Additionally, it has a built-in lubricant dispenser and high-flow water valve for wet grinding and polishing.
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