Festool C12 EC-TEC Bedienungsanleitung PDF herunterladen

Technical Review of

the C12 EC-TEC

Cordless Drill

By Rick Christopherson

Once again, Festool has shattered the expectations

of the drill industry with the release of the new

C12 cordless drill. The C12 is not just a cosmetic

change made to an existing design. The C12 is

packed with revolutionary motor and control

technology on several levels. Festool didn't just

leap forward in one area of this drill; they made

huge leaps forward in ALL areas of this drill. From

the motor, to the electronics, to the geartrain; this

drill raised the bar just past the fingertips of the

competition.

EC-TEC

Motor Technology

The heart of the C12 is the revolutionary EC-TEC

brushless motor. This isn't just your run-of-the-

mill motor. This is a permanent magnet, remotely

commutated, 3-phase, AC motor. This is the same

type of motor used as servo motors in robotic

systems where high torque, high speed, and

extreme durability are crucial.

So just how unique is this motor? Well, if you

mechanically turned the motor, it would generate

a 3-phase, sinusoidal AC output; just like

industrial diesel-electric generators do. (Do not

attempt this.

)

For years, the motor technology of cordless tools

has not changed. The brushed DC motor has been

the staple—albeit inefficient—motor for ages. The

brushed motor is simple, compact, and

inexpensive, but it suffers from inefficient use of

limited battery power. The greatest weakness of

the brushed motor is that the electricity to the

motor's windings passes through an electrical

connection that is constantly changing and

moving. Every time you see the brushes spark

inside of a brushed motor, it is a waste of energy

that is not available for use by the motor.

Never attempt to manually turn the output shaft of any

Festool drill or connect this drill to the output shaft of

another drill. The C12's output shaft has a mechanical lock

for bit changing and cannot be rotated manually.

To circumvent the

losses of the

brushed motor,

Festool

incorporated a

brushless DC

motor

into the

new C12 drill.

The electrical

connections to

the windings are

permanent, and

don't suffer from

the inefficiencies

of constantly

connecting and disconnecting as the motor rotates.

The brushless DC motor lasts longer, and requires

no maintenance, as compared to the brushed

motor. It is also smoother and quieter.

Electronics

There are some popular brand drills on the market

that are known to destroy themselves under a

normal, but heavy load. I know this first-hand

because I "smoked" a couple drills during my

investigation of drills (including the most

expensive drill my local home center carried).

A powerful drill is of little value if it is easily

damaged. The C12 has an intelligent electronic

controller that not only powers the motor, but

more importantly, monitors its health. Unlike

other drills on the market, the C12 won't let you

destroy the drill (or the battery) no matter how

hard you try.

It took less that 30 seconds to destroy a $270, 18-

volt drill, yet the 12-volt C12 handled the same

Even though this is a 3-phase, AC motor; it is the electronic

industry's practice to refer to this as a brushless DC (BLDC)

motor because the AC power signal is electronically created

and controlled from a DC (battery) power source.

1 2 3 4 5

Inhaltsverzeichnis

Seite 1 - Cordless Drill

Technical Review of the C12 EC-TEC Cordless Drill By Rick Christopherson Once again, Festool has shattered the expectations of the drill industry wi

Seite 2 - Battery Protection

load without causing damage. The C12 monitors the electrical power to the motor to ensure that the motor operates within safe parameters. However, ma

Seite 3 - Electromechanical C

asked of it, the drill will shut down to protebattery. This is an important feature that might be misunderstood by many users. Even though the drill s

Seite 4 - Conclusion

Another feature of the C12 gearbox is the integral shaft-lock to assist in bit changing. The motor can rotate the drill chuck, but the drill chuck can

Seite 5

► The C12 comes with the compact Centrotec bit holder, as shown, but also includes the standard keyless chuck (top image of the three attachments). T

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Festool C12 EC-TEC Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Kabellose Kombibohrer Festool C12 EC-TEC herunter. Festool C12 EC-TEC User's Manual Benutzerhandbuch

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