Trojan GP-2000A User manual

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.

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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.

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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

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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.

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：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.

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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

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7. Electrical Drawings

Drawings of the head.

12

Drawings of the base

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8. Schematics and Part list

14

15

16

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9. Packing List

NO.

Name

Unit

Quality

Remark

1

Working wheels

Pc

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

Trojan GP-2000A User manual

Trojan GP-2000A User manual

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