Milwaukee 4204-1 Operator's Manual download pdf (Page 7)

page 7

Control Panel (Fig. 6)

Magnetic Holding Force

The electromagnetic drill press attaches magnetically to any ferrous

metal. It is designed for use on 1/2" or thicker ferrous stock. Holding

power will decrease on thinner stock, a backup plate must be used. The

magnetic base WILL NOT hold on non-magnetic grades of stainless steel.

Backing Plate

A backing plate must be used when the workpiece is less than 1/2"

thick because the electromagnet cannot provide sufficient holding force

on thickness less than 1/2". The backing plate must bring the combined

thickness of the workpiece and backing plate to at least 1/2". Make sure

the backing plate is larger than the magnet footprint. Clamp the backing

plate underneath the workpiece, directly below the magnet, before turn-

ing the magnet on.

The workpiece must be able to support the mag stands weight without

bending. A bent workpiece reduces the magnets contact area which

can result in the magnet coming loose.

Surface Preparation

Paint, rust, scale or uneven surfaces decrease the holding strength of

the magnet. Chips, burrs, dirt and other foreign materials on the surface

of the magnetic base will also decrease holding power. Use a smooth,

flat file to keep the magnet clean and free of nicks. Clean the surface

before attaching the drill stand to the material.

Rack and Pinion

These units have a 10:1 feed ratio: i.e. for every pound applied to the

handle, you create ten pounds on the drill point, thereby eliminating op-

erator fatigue. Even large bits only require a small amount of pressure on

the handle. Example: 20 Pounds on the handle creates 200 Pounds on

the drill point.

A safety chain is standard equipment with every unit. Should a power

loss occur, the mounting could come loose.

When mounting the tool to a vertical surface, the safety chain must be

used to secure the tool to the surface.

1. To mount the tool to a vertical surface, place the magnetic drill press

on the prepared surface. Push the magnet button on to activate the

magnet.

2. Route the safety chain through the lower carrying handle and wrap it

tightly around a solid, rigid structure as shown (Fig. 5).

3. Eliminate any slack in the chain. Hook the safety chain together

using the snaphook provided.

4. Secure the safety chain with a c-clamp or similar device. This will

hold the chain in place and prevent the tool from sliding down the

vertical surface.

Drill Rotation Speed - Fast/Slow (Fig. 6A)

Adjusting the dial changes the drill rotation speed electronically. The higher

numbers on the dial produce faster rotation.

Drill Buttons - Forward/Reverse (Fig. 6B, C)

The drill may be set to two positions: forward and reverse.

1. For forward (clockwise) rotation, push the green forward button.

Check the direction of rotation before use.

2. For reverse (counterclockwise) rotation, push the yellow reverse but-

ton. Check direction of rotation before use.

To reduce the risk of injury, always use a safety chain when

drilling overhead or on a vertical surface.

WARNING!

OPERATION

Safety Chain (Fig. 5)

Line Lockout

The line lockout prevents the drill motor from starting when line power is

first applied to the system or after a momentary power loss.

Motor/Magnet Interlock

The motor/magnet interlock is a feature that prevents power from being

applied to the drill motor if the magnet is not energized. The motor magnet

interlock also prevents the magnet from being de-energized while the

motor is running.

Diagnostic Light

Low current reduces the magnet's holding power. When current is low,

the detection light will flash and the drill motor will stop. When the magnet

light flashes, check for the following:

 Low voltage at the plug

 Loose motor connection

 Mag panel buttons are jammed or stuck

If the detection light continues to flash, take the entire unit to an autho-

rized service center.

Auto Base/Chip De-Mag (Motor must be OFF)

The metal chips formed while drilling have a tendency to retain some

residual magnetism and stick to the base once the electromagnet is de-

energized. In order to prevent this, a base/chip de-mag is accomplished

after the motor has stopped by pushing the magnet button. The indicator

light will turn off and the base will automatically de-mag.

Electronic Switching

The drill motor may be switched from forward to reverse without first hav-

ing to bring the motor to a full stop. Ideal for tapping.

Soft-Start

Soft-start is incorporated into the system to help increase drill motor life

and decrease stress on the overall system. This feature increases the

drill motor speed up from zero to the maximum speed set by the dial in

less than one (1) second.

Feedback/Speed Control

The electronic speed control system allows the user to obtain repeatable

speed selections, at a given speed dial setting, without the constant change

seen with standard speed controls.

Fig. 6

D, E

C-clamp

Fig. 5

1 2 3 4 5 6 7 8 9 10 11

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Milwaukee 4204-1 Operator's Manual Page 7

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