Danfoss MCW104A Rotary Sensor/Controller Installation guide

Brand: Danfoss

Model: MCW104A Rotary Sensor/Controller

Type: Installation guide

MCW104A

BLN-95-8960-7 Issued: February 1998

Rotary Sensor/Controller

DESCRIPTION

The MCW104A Rotary Sensor/Controller is used to control

asphalt height on paving machines. The device is mounted

on one end of the asphalt auger such that the material level

in front of the auger rotates the Sensor’s paddle as it rises.

Height information is then sent to a proportional hydrostatic

transmission actuator to modulate the speed of the auger,

thus controlling material height.

FEATURES

• Sealed gain selection switch

• Heavy duty coil cord of eighteen gauge wire with neo-

prene insulation

• Coated printed circuit board resists effects of diesel fuel

• Flexibility with three-position gain switch

• Easy to install

• Vibration, shock, humidity and rain resistant

• May be mounted on either side of vehicle

TECHNICAL DATA

ELECTRICAL

SUPPLY VOLTAGE

11 to 15 Vdc

OUTPUT VOLTAGE

11.4 Vdc minimum at 14 Vdc supply into a 25 ohm load

CONNECTION DIAGRAM

ORDERING INFORMATION

SPECIFY

1. Model Number MCW104A1001 or MCW104A1027

Typical Hookup for the MCW104A.

1066A

PUMP

STROKER

12 Vdc

5 PIN

CONNECTOR

CONNECTING CABLE

MCW104A

PUMP

STROKER

12 Vdc

5 PIN

CONNECTOR

CONNECTING CABLE

MCW104A

THIS HOOKUP TURNS THE MCV104A ON WITH

COUNTERCLOCKWISE ROTATION OF THE INPUT SHAFT

THIS HOOKUP TURNS THE MCV104A ON WITH

CLOCKWISE ROTATION OF THE INPUT SHAFT

DIMENSIONS

1064

Dimensions of the MCW104A in Millimeters (Inches).

THEORY OF OPERATION

The MCW104A is composed of a shaft connected to a

potentiometer and a signal amplifier. Rotary Sensors are

positioned at the far ends of the asphalt auger. The cus-

tomer-supplied paddle arms rotate the input shaft in

proportion to asphalt height at the two ends. As the asphalt

rises and the arms rotate, the potentiometer wiper acts as the

input signal to a modified differential amplifier, where it

undergoes a gain determined by a network of resistors. A

gain selection switch modifies this resistor network. The

output of the differential amplifier is again amplified and fed

to the hydrostatic transmission actuator. The actuator modu-

lates the pump which varies the speed of the motor driving the

feed augers, thus controlling the height of the asphalt on the

auger and depth of the asphalt ahead of the screed. Propor-

tional control of auger speed thus allows the machine

operator to vary his forward speed while maintaining a

constant asphalt height.

Set your individual gain as desired. The High position

provides the greatest sensitivity in that a 15° rotation of the

input shaft will give full output. In the Medium position a 30°

rotation will give full output. The Low position requires 45° of

rotation for full output. The Medium position provides

smooth operation and will be satisfactory under most oper-

ating conditions.

PERFORMANCE

SHAFT ROTATION

220° between stops

PROPORTIONAL BAND

With 14 Vdc supply voltage and a 25 ohm load, the

clockwise shaft rotation beyond the switch-on point of

110° required to increase the output voltage from .1 to

11.4 Vdc shall be as follows:

GAIN SWITCH SETTING SHAFT ROTATION

Medium

Low

15°

30°

45°

High

BLN-95-8960-7

CUSTOMER SERVICE

NORTH AMERICA

ORDER FROM

Danfoss (US) Company

Customer Service Department

3500 Annapolis Lane North

Minneapolis, Minnesota 55447

Phone: (763) 509-2084

Fax: (763) 559-0108

DEVICE REPAIR

For devices in need of repair or evaluation, include a

description of the problem and what work you believe

needs to be done, along with your name, address and

telephone number.

RETURN TO

Danfoss (US) Company

Return Goods Department

3500 Annapolis Lane North

Minneapolis, Minnesota 55447

EUROPE

ORDER FROM

Danfoss (Neumünster) GmbH & Co.

Order Entry Department

Krokamp 35

Postfach 2460

D-24531 Neumünster

Germany

Phone: 49-4321-8710

Fax: 49-4321-871-184

BLN-95-8960-7

Danfoss MCW104A Rotary Sensor/Controller Installation guide

Danfoss MCW104A Rotary Sensor/Controller Installation guide

Danfoss MCW104A Rotary Sensor/Controller Installation guide

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