electronic_parking_brake

The RETRACTOR Electronic Parking Brake Tool does exactly what is says, it allows you to retract the brake calipers, replace your pads, contract the calipers back again to full rotor contact, then finally STEP retract the calipers to set the pad to rotor clearance. Read below to see how it works…

What is Electronic Parking Brake?

Almost any automotive make today is moving
towards the use of EPB or Electronic Parking Brakes. Why? It’s
simple, because the system is simpler to make and can be
adapted with extra features with just software, like uphill
brake hold. These systems employ an electrically geared
operated brake caliper in embedded to a normal hydraulic unit.
So the system works like a normal hydraulic caliper, but also
has a motor controlled mechanism using gears to advance the
caliper piston further mechanically. In this way, it effects
the parking brake. The EPB system is computer controlled. In
other words, there is a two terminal CD Motor controlled by
the computer. The computer/module reverses polarity to retract
or contract the caliper as needed.

Why is the RETRACTOR the best choice.

There are various other EPB Tools available,
mostly scanner based, as for VW/Audi systems like the VAG
scanner. These are fine, but not the best choice. Why? It is
simple, the RETRACTOR EPB Tool provides the highest current
possible needed to operate the motor and now fully PWM
controlled. Often, these motors momentarily seize internally
due to debris and dirt. The car’s computer may not provide the
needed current to retract the caliper when “Doing A
Brake-Job”. There may not be anything wrong with the caliper
itself, its gears are used to being in one position for a long
time and need a little help. That’s where the RETRACTOR EPB
Tool is king.

The RETRACTOR “EPB” Electronic Parking Brake
Tool with full PWM modulation, has industry dedicated
microprocessor and DRIVER transistors made exclusively for DC
Motor Control. Simply put, the electronics inside the
RETRACTOR EPB Tool is the best equipment money can buy.

The RETRACTOR EPB (Electronic Parking Brake)
Tool is also made for any and all cars that use a DC Motor for
the EPB calipers. To this day, they are all using DC Motors
for the EPB calipers. There may come a day when car makers
start using “Stepper” motors for these calipers, but not yet
and there’s no reason for that. As we’ve explained before,
these systems use a variable polarity/direction DC motor.

Is it necessary to reset these EPB systems after
a brake job? Not necessarily if you’ve done the procedure
right and here’s why. The EPB system uses a two terminal DC
Motor and no position sensor. The computer has no idea where
the caliper piston is at. It infers a position by “Ripple
Counting” the motor actuation. So, every time the caliper DC
Motor retract and contracts fully, the EPB computer counts the
motor commutator ripples and more or less determines the
caliper piston position. In actuality, all car makers do
provide a way to reset the caliper “WITHOUT” a scanner, even
VW Audi. But even if you don’t, the system does a
functionality check any time you start the car. Why? Because
as explained, inferring the caliper piston position from
counting motor ripple is not accurate. Furthermore, if you
follow the proper procedure for the RETRACTOR, it’ll be as
if you were never there.

Yes, that’s right, with the RETRACTOR is as if
you were never there. The RETRACTOR EPB Tool has a PUSH button
for fast motor actuation and also a super ACCURATE DIGITAL PWM
encoder for “Step-By-Step” DC Motor actuation. Pushing the
button steadily will rotate the DC Motor “At FULL CURRENT”,
then momentarily pushing the button will retract or contract
the caliper in steps. This is enough to finely adjust the pad
to rotor clearance. As we’ve mentioned before, “As if you
were never there”.

Finally, the RETRACTOR EPB Tool also has
specific PWM electronics that monitors the current flow
through the DC Motor. In essence, this tool will not let
excessive current flow at the DC Motor, thereby, protecting
it. The RETRACTOR electronics is microprocessor controlled,
like having a monitoring current probe at the DC motor. No
other electronic parking brake motor testing tool has this
much technology in it.

The RETRACTOR EPB WM Tool comes complete, with
all cables, operator’s manual on CD ROM or USB, and plastic
carrying case. A complete electronic parking brake tool.

RETRACTOR

Electronic Parking Brake Tool