Baldor iMN1800 Manual De Usuario

Installation & Operation 2-33

MN1800

Encoder type: Non contact optical, glass scale, open type.  Open scale linear encoders
are used primarily where environmental conditions are clean, dry and free of oils.  Due to
the fragile nature of the encoder scale, extra care should be taken to prevent physical
damage from impact or abrasion.

Mechanical design: Glass scale, optical scanning unit, high flex twisted shielded cable.
Encoder is adhered to stage surface with a two part, releasable bonding agent. (DO NOT
attempt to remove the scale from the stage surface, for this will permanently damage the
encoder scale.  Contact Baldor or an authorized distributor for assistance)

Maintenance: The encoder scale can be cleaned with alcohol.  Avoid chemicals such as
acetone, MEK, and other solvents and soaps that can damage the scale or leave a film.
The encoder optical scanning unit should be treated with great care as not to scratch or
mar the external read head surface.  If cleaning is required, the encoder read head
surface can be cleaned with alcohol. (Avoid submersion).  Using a cotton swab, lightly
wipe clean the contaminated surfaces.  If removal of the encoder optical read head is
required, consult with Baldor or an authorized distributor.

Wiring diagram: (for flying leads, high flex)  

Black

+5VDC

Encoder Power

0VDC Encoder 

GND

Green

A+

Incremental Signal

Yellow

A–

Incremental Signal

Orange

B+

Incremental Signal

Red

B–

Incremental Signal

Blue

C+

Incremental Signal

Violet

C–

Incremental Signal

Gray

Limit+

Limit

White

Limit–

Limit

Inner Shield

Inner Shield (Connect to 0VDC, Logic Ground)

Outer Shield

Outer Shield (Connect to Earth Ground)

Encoder Type:

Digital output, glass scale

Input power:

5VDC, 200mA

Output:

A/B quadrature and reference marks, differential line drive output

Resolution:

0.1, 1.0, 5.0, 10.0 micron

Accuracy:

±

3 micron after scaling*

Reference mark:

±

one count (bidirectional)

(reference marks separated by n x 50mm)

* Scaling is a calibration technique used to determine and communicate linear encoder

and positioning stage mechanical characteristics, (accuracy and resolution) to the
motion controller.

Note: Max speed is determined by the encoder resolution, the controller’s band

width and the mechanical limitations of the positioning stage.  Should you
need assistance in calculating the maximum speed for the positioning stage,
please consult with Baldor.