BULLETIN LC6
Series 869X
LO-COG 26mm
Iron Core DC Motors
®
Pittman brand LO-COG® 26 millimeter diameter brush-commutated DC motors offer
smooth, quiet operation and long life. Armatures are skewed to minimize magnetic
cogging, even at low speeds, and windings are resin impregnated for greater reliability
in incremental motion applications. An innovative cartridge brush assembly reduces
audible and electrical noise and significantly improves brush life by maintaining
optimum brush force throughout the life of the motor. For precision motion control,
Hewlett-Packard® optical encoders are available in 2 or 3 channel versions with
several CPR ranges to meet your position, velocity and direction feedback needs.
Construction
Options
• 7 slot skewed armature
• 2 pole permanent magnet stators are
constructed of bonded neodymium iron
boron magnets
• Diamond turned commutators ensure
maximum brush life
• Standard copper graphite brushes
• Precision ground hardened stainless
steel shafts
• Silicon-steel laminations
• Ball bearings
• Custom cables
• Shaft modifications
• Shaft-mounted pulleys and gears
• Multiple windings
• RFI suppression
• Dynamic armature balancing
• Customized versions available in
production quantities
• Other brush materials available
• Optical encoders
Get same day shipment of sample motors for models
listed in the Pittman Express Catalog (Bulletin PE).
Series 869X™
• Available in 3 lengths
• Speeds up to 9,000 RPM
• Peak Torques up to 20 oz·in
• Encoder resolutions from 96 to 1024
Every Pittman motor is
subjected to automated
performance testing
prior to shipment.
LC6-1
SERIES 869X
Motor Data
Line No.
Parameter
Symbol
Units
8X91
8X92
8X93
1.93
0.014
2.44
0.017
3.17
0.022
1
Continuous Torque (Max.) 1
TC
oz·in
(N·m)
2
Peak Torque (Stall) 2
TPK
oz·in
(N·m)
8.86
(6.26 X 10 –2)
12.65
(8.93 X 10 –2)
20.17
(1.42 X 10 –1)
3
Friction Torque
TF
oz·in
(N·m)
.30
(2.1 X 10 –3)
.30
(2.1 X 10 –3)
.30
(2.1 X 10 –3)
4
No Load Speed
SNL
rpm
(rad/s)
7020
(735)
7350
(770)
8975
(940)
5
Rotor Inertia
JM
oz·in·s2
(kg·m2)
1.4 X 10 –4
(9.8 X 10–7)
1.7 X 10 –4
(1.2 X 10–6)
2.3 X 10 –4
(1.6 X 10–6)
6
Electrical Time Constant
τE
ms
0.58
0.62
0.61
7
Mechanical Time Constant
τM
ms
11.8
10.56
10.93
8
Viscous Damping—
Infinite Source Impedance
D
oz·in/krpm
(N·m/(rad/s))
.0087
(5.87 X 10 –7)
.0104
(7.01 X 10 –7)
.0147
(9.91 X 10 –7)
9
Damping Constant—
Zero Source Impedance
KD
oz·in/krpm
(N·m/(rad/s))
1.26
(8.49 X 10–5)
1.72
(1.16 X 10–4)
2.24
(1.51 X 10–4)
10
Maximum Winding
Temperature
θMAX
°F
(°C)
266
(130)
266
(130)
266
(130)
11
Thermal Impedance
RTH
°C/watt
18.9
17.9
16.4
12
Thermal Time Constant
τTH
min.
13.0
12.5
12.1
13
Motor Weight
(Mass)
WM
oz
(g)
2.68
(76)
3.05
(86)
3.74
(106)
14
Motor Constant 2
KM
oz·in/√W
(N·m/√W)
1.296
(9.15 X 10–3)
1.50
(10.6 X 10–3)
1.72
(12.1 X 10–3)
15
Motor Length
L1
in max.
(mm max.)
1.798
(45.67)
1.923
(48.84)
2.173
(55.19)
1 Continuous torque specified at 25°C ambient temperature
2 Theoretical values supplied for reference only.
and without additional heat sink.
©1999 Pittman, a PennEngineering company. LO-COG, ELCOM,
ELCOM SL, and ELCOM ST are brand names and trademarks for
motors manufactured exclusively by Pittman.
LC6-2
R
SERIES 869X
Model 8691
Model 8692
6.0
Motor Speed & Current vs. Torque
(24V Winding)
6.0
Motor Speed & Current vs. Torque
(24V Winding)
5.0
5.0
9000
9000
4.0
Speed (rpm)
1.0
Current (A)
3.0
5000
2.0
Continuous
Torque
Speed (rpm)
4500
7500
2.0
Continuous
Torque
3.0
5000
4.0
Current (A)
7500
4500
1.0
3000
3000
0.0
1500
8.0
7.0 (56.5)
6.0 (49.4)
)
(42.3
0
0.0
(0.0)
0.0
10.0
9.0 (70.6)
)
(63.6
15.0
.9)
(105
1500
10.0
)
(70.6
5.0
4.0
5.3)
3.0 (28.3) (3
•
2.0 (21.2)
•
1.0 (14.1)
)
(10.5
oz in )
m
e
Torqu (mN
5.0
)
(35.3
0
0.0
(0.0)
Model 8693
oz•in )
•m
e
Torqu (mN
6.0
Motor Speed & Current vs. Torque
(24V Winding)
5.0
9000
3.0
2.0
Continuous
Torque
Speed (rpm)
5000
Current (A)
4.0
7500
4500
1.0
3000
0.0
1500
0
0.0
(0.0)
5.0
)
(35.3
10.0
)
(70.6
15.0
.9)
(105
•
•
20.0
.3)
(141
25.0
.6)
(176
oz in )
m
e
Torqu (mN
R
LC6-3
SERIES 869X
Motor 869X
M2 X 0.4 ISO
(2) HOLES 180û APART
ON A ¯.669 B.C.
.200 DP. MAX.
L1 MAX.*
STANDARD LEAD WIRES
22 AWG, (7X30),
UL STYLE 1007/1569
18Ó ±1/2, RED & BLACK
.25
(6.35)
STRIP &
TIN (TYP.)
± .030 (.762)
.492
(12.50)
1.024
(26) DIA.
+ .000 (.00)
Ð .005 (.127)
± .020 (.5)
.050
(1.27)
.060
(1.52)
Motor 869X with Standard Encoder
1.180
(29.97)
5 4 3 2 1
.640
(16.26)
MAX.
A MAX.
+.000 -.005 (-0.13)
.060
(1.52)
.19
(4.83)
± 1/2Ó (12.70)
LEADS 18"
(457.20)
TYP.
.190
(4.83)
OPTIONAL LEAD
WIRES AVAILABLE
.520
(13.21)
.350 (8.89) MAX.
+.010 -.005 (+0.25 -0.13)
1.005 (25.53)
± .020 (.51)
.587
(14.91)
Encoder Connection Chart
Pin No.
Color
Connection
1
Black
Ground
2
Green
Index
3
Yellow
Channel A
4
Red
Vcc
5
Blue
Channel B
Notes:
• Unless otherwise specified, all tolerances are
to be ±.005 (.01)
• All measurements are in inches (mm)
R
LC6-4
SERIES 869X
Model 8691 Winding Data (Other windings available upon request)
Line No.
Symbol
Units
17
Reference Voltage
E
V
18
Torque Constant
KT
oz·in /A
(N·m/A)
1.08
1.37
1.74
2.17
2.71
3.44
4.35
5.47
6.92
8.70
(7.6 X 10–3) (9.7 X 10–3) (12.2 X10–3) (15.3X10–3) (19.1X10–3) (24.2X10–3) (30.7X10–3) (38.6X10–3) (48.8X10–3) (61.4X10–3)
19
Back-EMF Constant
KE
V/krpm
(V/rad/s)
0.79
1.01
1.28
1.61
2.01
2.54
3.22
4.05
5.12
6.43
(7.6 X 10–3) (9.7 X 10–3) (12.2 X10–3) (15.3X10–3) (19.1X10–3) (24.2X10–3) (30.7X10–3) (38.6X10–3) (48.8X10–3) (61.4X10–3)
20
Resistance
RT
Ω
0.80
1.22
1.87
2.89
4.47
7.08
21
Inductance
L
mH
0.41
0.66
1.05
1.63
2.55
22
No Load Current
INL
A
0.39
0.31
0.25
0.20
0.16
IP
A
7.49
6.21
5.10
4.15
3.38
23
Parameter
Peak Current
(Stall) 2
8691
6.00
7.58
9.55
12.0
15.1
19.1
24.0
30.3
38.2
48.0
11.26
17.77
28.20
44.67
4.10
6.55
10.23
16.59
26.20
0.13
0.095
0.08
0.06
0.05
2.69
2.13
1.70
1.35
1.07
19.1
24.0
Model 8692 Winding Data (Other windings available upon request)
Line No.
24
Parameter
Reference Voltage
Symbol
Units
E
V
8692
6.00
7.58
9.55
12.0
15.1
30.3
38.2
48.0
25
Torque Constant
KT
oz·in/A
(N·m/A)
1.05
1.32
1.76
2.11
2.64
3.30
4.18
5.28
6.64
8.40
(7.41X10–3) (9.32X10–3) (12.4X10–3) (19.9X10–3) (18.6X10–3) (23.3X10–3) (29.5X10–3) (37.3X10–3) (46.9X10–3) (59.3X10–3)
26
Back-EMF Constant
KE
V/krpm
0.78
0.97
1.24
1.56
1.95
2.44
3.09
3.90
4.91
6.21
(V/rad/s) (7.41X10–3) (9.32X10–3) (12.4X10–3) (19.9X10–3) (18.6X10–3) (23.3X10–3) (29.5X10–3) (37.3X10–3) (46.9X10–3) (59.3X10–3)
27
Resistance
RT
Ω
0.59
0.86
1.30
2.02
3.10
4.84
7.67
12.19
19.17
30.61
28
Inductance
L
mH
0.30
0.47
0.76
1.21
1.90
2.97
4.77
7.61
12.05
19.28
29
No Load Current
INL
A
0.419
0.338
0.268
0.213
0.166
0.134
0.103
0.087
0.063
0.055
30
Peak Current (Stall) 2
IP
A
10.17
8.81
7.35
5.94
4.87
3.95
3.13
2.48
1.99
1.57
12.0
15.1
19.1
24.0
30.3
38.2
48.0
Model 8693 Winding Data (Other windings available upon request)
Line No.
Symbol
Units
31
Reference Voltage
E
V
32
Torque Constant
KT
oz·in/A
(N·m/A)
0.86
1.09
1.38
1.73
2.19
2.77
3.46
4.32
5.47
6.92
(6.07X10–3) (7.69X10–3) (9.74X10–3) (12.2X10–3) (15.5X10–3) (19.6X10–3) (24.4X10–3) (30.5X10–3) (38.6X10–3) (48.9X10–3)
33
Back-EMF Constant
KE
V/krpm
(V/rad/s)
0.64
0.81
1.02
1.28
1.62
2.05
2.56
3.19
4.05
5.12
(6.07X10–3) (7.69X10–3) (9.74X10–3) (12.2X10–3) (15.5X10–3) (19.6X10–3) (24.4X10–3) (30.5X10–3) (38.6X10–3) (48.9X10–3)
34
Resistance
RT
Ω
35
Inductance
L
mH
0.15
0.24
0.39
0.61
0.98
1.56
2.44
3.81
6.12
9.77
36
No Load Current
INL
A
0.57
0.44
0.35
0.28
0.22
0.18
0.14
0.11
0.09
0.07
37
Peak Current (Stall) 2
IP
A
17.14
15.16
13.08
11.11
9.04
7.37
5.97
4.82
3.83
3.03
2 Theoretical
Parameter
8693
6.00
0.35
7.58
0.50
9.55
0.73
1.08
1.67
2.59
4.02
6.28
9.96
15.82
values supplied for reference only.
R
LC6-5
SERIES 22mm
R
Specifications subject to change without notice.
LC6-6
343 GODSHALL DRIVE
HARLEYSVILLE, PENNSYLVANIA 19438 U.S.A.
PHONE: 215-256-6601 • FAX: 215-256-1338
TOLL FREE: 877- PITTMAN (USA Only)
E-MAIL: info@pittmannet.com
WEB SITE: www.pittmannet.com
2/02