Jet Tools J-7040, J-7020 Introduction, Operating Instructions, Controls, Setting Blade Speed

Introduction

This manual includes the operating and maintenance instructions for the JET 10-inch by 16-inch Cut Off Band Saw, Models J-7020/J-7040. This manual also includes parts listings and illustrations of replaceable parts.

Operating Instructions

Controls

The operating controls for the saw are provided in a control panel on the left side of the machine. The con- trol panel is mounted on a pivoting tube. The pivoting tube allows the operator to position the control panel in a convenient location.

Power-on

Light

Motor

Pushbutton

Emergency

Reset

Button

Saw Head

Pushbutton

Figure 1: Control panel

1.A power-on light is provided on the left side of the control panel. The power-on light indicates when power is connected to the machine.

2.A n emergency stop button is provided on the control panel. The emergency stop button pro- vides a means to rapidly cut off electrical power.

3.The saw motor pushbutton switch starts the saw motor and the E-stop button stops the saw motor.

4.A green pushbutton switch is provided to the right of the emergency stop pushbutton. The pushbutton

opens an electro-magnetic valve in the hydraulic cylinder circuit. Opening the valves allows the saw head to move downward and put the saw blade in contact with the workpiece.

5.A red release button on the electro-magnetic valve provides a means to lower the saw head when power to the machine has been discon- nected (see figure 4).

6.The rate at which the saw head moves downward is controlled by a hydraulic feed rate control located on the top, rear of the saw head (see figure 3).

7.A coolant pump switch is provided on the electri- cal equipment box on the back of the machine (see figure 2).

Setting Blade Speed

1.The blade speed is controlled by an adjustment mechanism on the right end of the saw. Speed increases when the adjustment knob is turned counterclockwise. Speed decreases when the

knob is turned clockwise.

2.A placard on the drive belt guard provides recom mended speeds for various materials.

3.A speed indicator is provided on the barrel of the adjustment mechanism. The indicator provides speed indications in feet per minute and meters per minute. (The meters per minute values are shown in parenthesis on the indicator.)

4.The feed rates on the placard are expressed in meters per minute. The feed rate graduations available on the indicator may not match the recommended feed rate. An approximate speed may therefore be required. For example, to set a speed rate of 25 meters per minute, the indicator would be set about midway between 21 meters- per-minute and the 30 meters-per-minute gradu- ations.

WARNING: TO CHANGE SPEED, THE SAW MOTOR MUST BE OPERATING.

5.Turn the speed adjustment knob to the desired rate setting as determined by the material being cut.

7

Coolant

Pump

Switch

Figure 2: Coolant pump switch