R. 171011
2
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
Tel: 615/595-6665
Fax: 615/595-6610
Introduction
The SUM-40 is an all-in-one motor and controller system featuring high-resolution closed-loop
control, zero-power hold, high direct drive torque, and quiet operation. The SUM-40 only needs
an external power supply and a communications connection to operate; no external feedback
devices are required. This document describes the setup and operating specifications of the
SUM-40 motor. A separate document (“SUM-40 Communication Protocol”) describes how to
communicate with the SUM-40 from a host. Note that the RS-232 level is full voltage and is not
TTL compatible. A level converter must be used to connect the RS-232 port to a microcontroller.
Specifications
Property
Value
Notes
Mechanical
Mounting pattern
3.4mm through holes on
31mm square
NEMA 17 hole pattern
Output shaft diameter
4 mm
With flat
Output shaft length
11 mm
Nominal length
Overall size
40 mm x 40 mm x 34.4 mm
Mass
82 g
Operating temperature
-10 C – 55 C
Shaft maximum radial load
20 N
Shaft maximum axial load
20 N away from motor,
10 N towards motor
Performance
Maximum speed
1800 deg/sec
No load
Maximum torque @ 700 deg/sec
100 mNm
See torque-speed information
below
Zero power hold torque
140 mNm
Feedback type
Optical encoder
Feedback resolution
46,592 counts/rev
0.0077 counts/degree
130 µrad
Range of motion
Continuous
Backlash
Zero
System is direct drive with no
gearing
Lifetime
2000 hours
Electrical/communications
Input voltage
12 V
Required power (max)
12 W
Idle power
<1 W
Baud rate
921600