wiki:ElectroCraftThirtysixEighteen

Reliance Electric Electro-Craft E-3618-E-F00AN NEMA23 Brushless Servo Motor

http://factoryswblog.org/wp-content/uploads/2012/Electro-Craft_E3618.jpg
The E-3618-E-F00AN is a single stack NEMA 23 brushless servo motor with a Renco 77822-073 encoder 4000 count encoder.

Electro-Craft E-Series Data Sheet

As noted below, I did manage to find the E-Series Datasheet. I have scanned and uploaded it; it's linked at the bottom of the page. The PDF contains information on:

  • The Electro-Craft BDC Mini-Series Amplifier (this data sheet includes torque curves for various amp/motor combinations)
  • E-3618 brushless servo motor
  • E-3622 brushless servo motor
  • E-3626 brushless servo motor
  • E-3629 brushless servo motor
  • E-3633 brushless servo motor

Motor Notes

The history of Electro-Craft has lots of twists, and I couldn't find an authoritative history. In 1980 Robbins & Myers bought Electro-Craft. They sold it in 1991, probably to Reliance Electric. Reliance Electric was bought by Rockwell Automation in 1994. I'm pretty sure the Electro-Craft brand went dormant for a while, with the E-series motor dropped, but not at first: I do have Rockwell Automation / Electro-Craft catalog with the E-3622 and E-3633, but not the E-3618.

The Electro-Craft brand is currently owned by Eastern Air Devices, which is now using the Electro-Craft name.

Renco was part of Electro-Craft from 1977 to 1991, when it was sold it its current owner, Heidenhain.

I could not find any datasheets on the E-3618 online, but searching in some dark, dusty, seldom visited places I was able to scrounge up a 1993 Reliance Electric / Electro-Craft catalog with the E-3618.

I have to say the E-3618 is a pretty wimpy motor.

I could not find a datasheet for the 77822-073, but I think it's similar to the Renco RM15; the wire colors match up pretty well.

Motor Specifications

Mechanical Specifications

ParameterValueUnit
Cont Stall Torque11.5oz-in
Peak Torque50oz-in
Max Cont. Operating Speed5000RPM
Motor Inertia0.0002oz-in-sec-sec
Weight1.0lb

Winding Constants

ParameterValueUnit
Torque Constant5.9oz-in/A
Ke Voltage Constant4.4V/KRPM
Winding Resistance2.8Ohm
Winding Inductance2.9mH

Motor Connections

Power

PhaseWire Color
RBlue
SBrown
TViolet

Hall Sensor

The motor has three hall sensors built into its body.

PhaseWire Color
AYellow
BWhite
COrange
+5VDCRed
GNDBlack

Encoder

My standard is positive is when the motor, when viewed from the front, is turning clockwise. (My B+/B- connections are flipped when compared to the Renco RM15 wire colors).

SignalWire Color
GroundBlack
+5VDC Red
A+ White
A- Yellow
B+ Blue
B- Green
Index+Orange
Index-Brown
Last modified 3 years ago Last modified on Oct 22, 2014 12:48:03 AM

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