Replaced by the ENC4118 - Draw Wire Encoder (1m)
In complex mechanical systems, it is often very difficult to accurately measure the movement of a single part, especially if the linear alignment isn't guaranteed to be perfect. The draw wire encoder is a versatile solution to this very problem. When the wire is pulled out, the encoder produces a quadrature signal to describe the change in distance.
When the wire is pulled out, the sensor produces a quadrature signal to describe the length of wire exposed. The reel is spring loaded, so it will retract when there is no tension in the wire. Multiple draw wire sensors could be used to track the position in more than one dimension.
This quadrature encoder can be read by an encoder interface by fitting the end of the cable with the appropriate connector. See the Connection & Compatibility tab for details.
This draw-wire encoder must be read by an encoder interface. These interfaces will interpret the two quadrature signals in order to determine the continuous position of the draw wire. The following interfaces are compatible with this encoder:
| Product | Encoder Interface | ||
|---|---|---|---|
| Part Number | Price | Number of Encoder Inputs | Count Rate Max |
 PhidgetEncoder HighSpeed 4-Input
|
$75.00 | 4 | 1E+06 pulses/s |
 PhidgetEncoder HighSpeed 4-Input
|
$75.00 | 4 | 1E+06 pulses/s |
 PhidgetEncoder HighSpeed
|
$50.00 | 1 | 2E+06 pulses/s |
 PhidgetEncoder HighSpeed
|
$50.00 | 1 | 1E+06 pulses/s |
 PhidgetMotorControl 1-Motor
|
$75.00 | 1 | 500000 cycles/s |
 DC Motor Phidget
|
$75.00 | 1 | 400000 pulses/s |
 4A DC Motor Phidget
|
$40.00 | 1 | 400000 pulses/s |
 Quadrature Encoder Phidget
|
$15.00 | 1 | 400000 pulses/s |
You can easily connect this draw-wire encoder to a Phidgets encoder interface by cutting the end off of a Phidget encoder cable and soldering the wires to the encoder as described in this table. Below you'll find a list of available encoder cables:
|
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Alternatively, you could buy the male connector (Molex part 50-57-9405), and crimp it onto the end of the cable, if you have the appropriate tools.
| Product | Physical Properties | ||
|---|---|---|---|
| Part Number | Price | Cable Length | Cable Gauge |
 HighSpeed Encoder Cable 50cm
|
$5.00 | 500 mm | 26 AWG |
| Encoder Properties | |
|---|---|
| Output Circuit Type | Push-Pull |
| Draw Wire Resolution | 20 μm |
| Wire Pull Length | 500 mm |
| Electrical Properties | |
| Supply Voltage Min | 5 V DC |
| Supply Voltage Max | 26 V DC |
| Current Consumption Max | 60 mA |
| Physical Properties | |
| IP Rating | IP54 |
| Wire Load Maximum | 16 kg |
| Wire Pull Speed Max | 1 m/s |
| Weight | 300 g |
| Operating Temperature Min | -20 °C |
| Operating Temperature Max | 80 °C |
| Screw Thread Size | M5 |
| Customs Information | |
| Canadian HS Export Code | 9029.10.00 |
| American HTS Import Code | 9029.10.80.00 |
| Country of Origin | CN (China) |
| Product | Encoder Properties | Physical Properties | |||
|---|---|---|---|---|---|
| Part Number | Price | Output Circuit Type | Length Resolution | Wire Pull Length | Weight |
 Draw Wire Encoder (1m)
|
$75.00 | Push-Pull | — | 1 m | 305 g |
 Draw Wire Encoder (1.5m)
|
$80.00 | Push-Pull | — | 1.5 m | 485 g |
 Draw Wire Encoder (1m)
|
$100.00 | Push-Pull | — | 1 m | 400 g |
 Draw Wire Encoder (3m)
|
$150.00 | Push-Pull | — | 3 m | 790 g |
