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QR12 Optical Encoder Design Features:
- Low profile assembled height
- Bearing design simplifies
encoder attachment
- Resolutions up to 20,000 lines per revolution
- 4, 6 or
8 pole commutation
- Multiple Bolt Circle mounting
- Through shaft sizes up to
0.375” (10mm) Diameter
- High Noise Immunity
- Cost Competitive with Modular Encoders
- 500 kHz Frequency
Response
- RoHS Construction
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Description:
Quantum Devices, Inc. Model QR12 Optical Encoder provides an improved Rotary Encoder feedback
solution in applications typically using modular encoders. With
an over all height of less than one inch and the stability of
a bearing encoder design, the model QR12 Optical Encodre can provide significant
performance upgrades in applications limited by traditional modular
encoder solutions. Outputs consist of a quadrature with index
pulse and three-phase commutation. A flexible member allows for
much greater tail shaft run out and TIR than can be tolerated
by modular encoder designs, plus it provides 30 degrees of rotation
for commutation timing.
QR12 Optical Encoder Ordering Information
Sample: QR12-1000-4-A-B-L-C-A
| Model |
PPR |
Poles |
Electrical |
Hub Configuration |
Hub Size |
Mounting |
Index |
| QR12 |
24*
256
360
500
512
1000
1024
1250
2000
|
2048
2500
4000
4096
5000
8192
10000
16384
20000 |
0=0
4=4
6=6
8=8 |
A=RS422 (TTL)
B=oc UVW |
| B= |
Bottom Mount Hub with Hole in Cover |
| C= |
Bottom Mount Hub with NO Hole in Cover |
|
C=5mm
D=6mm
E=8mm
F=10mm
L=.25"
M=.3125"
N=.375" |
A=SS 1.812" Flex
B=SS 1.575" Flex
C=SS 1.280" Flex |
A=Gated to AB, 90deg |
Consult Factory For Configurations Not Shown, * 24PPR only available
0 poles.
QR12 Optical Encoder Electrical Specifications
| Input Voltage |
5 VDC ± 5% |
| Input Current Requirements |
65mA Typ., 100mA Max Plus Interface Loads |
| Input Ripple |
2% Peak to Peak @ 5 VDC |
| Output Circuits |
(A) 26C31 RS 422A Line Driver (TTL Compatible)
(B) ABZ Line Driver, UVW Open Collector (No U’ V’ W’) |
| Incremental Output Format |
Quadrature with A leading B for CW rotation.
Index Pulse true over A and B High. |
| Frequency Response |
500 kHz |
| Symmetry |
180 Degrees ± 10% Typical |
| Minimum Edge Separation |
<4000PPR = 54 electrical degrees
≥4000PPR = 45 electrical degrees |
| Commutation Format |
Three Phase 4, 6 or 8 poles |
| Commutation Accuracy |
± 1° mechanical |
QR12 Optical Encoder Environmental Specifications
| Storage Temperature |
-40 to 125° C |
| Operating Temperature |
-20 to 115° C |
| IP Rating |
40 |
| Humidity |
90% Non-Condensing |
| Vibration |
20 g's @ 50 to 500 CPS |
| Shock |
50 g's @ 11mS Duration |
QR12 Optical Encoder Mechanical Specifications
| Through Shaft Diameter |
0.250", 0.3125", 0.375", 5mm
6mm ,8mm, 10mm
Tolerance: -0.0000, + 0.0006” |
| Recommended Shaft Engagement |
.50” Minimum |
| Radial Shaft Movement |
0.007" TIR |
| Axial Shaft Movement |
± 0.030" |
| Maximum Shaft Speed |
8000 RPM, Contact Customer Service
for Higher RPM |
| Interface Connector |
Connector: JAE P/N F1-W15P-HFE |
| Mounting |
1.28”, 1.575”, 1.812” Bolt
Circle |
| Moment of Inertia |
9.1 x 10-5 oz-in-S2 |
| Acceleration |
1x105 Radians/S2 |
| Accuracy |
± 1.5 arc minute |
QR12 Optical Encoder Output Waveforms
QR12 OPTICAL ENCODER SIZE 15 RESOLVER MOUNTS
Utilize
the optional resolver mount adapters to mate the QR12 - 1.280” Flex
mount option to Size 15 Pancake Resolver motor configurations.
Eliminate the expensive mounting servo clamps by attaching
either the two or three point adapters directly to the servo
clamp holes. Assemble the QR12 to the adapter plate using
(2) 4-40 screws. For jam nut attachment to threaded motor
shafts, refer to JR12 Jam Nut Mount Optical Encoder Literature.
OPTICAL ENCODER INSTALLTION INSTRUCTIONS
- Using two fingers slide the encoder
onto shaft.
- For additional security, Loctite can
be applied to the optical encoder hub set screws. Remove the encoder’s
set screws and using tip of toothpick apply appropriate amount
of Loctite thread locking adhesive. A non-permanent adhesive
is recommended.
- Insert and tighten encoder set screws
using a .050” hex wrench. Typical torque range of 50 to
80 oz-in.
- Fixture the stainless steel flex mount
to the mounting surface with #6-32 button head screws.
For brushless motors requiring commutation timing:
- Encoder
drawings indicate position of encoder hub to encoder body at
Z (index). Rotating the hub to this know position allows for
known U channel transition state (prior to step one above).
- Powering
appropriate motor windings allow for locking motor shaft location
to match the appropriate U transition (prior to step one above).
- While
mechanically back driving the motor, monitor motor winding EMF
position to the powered encoder position. Rotate the encoder
stainless steel flex mount to achieve accurate timing of encoder
commutation feedback channels to the appropriate motor winding
EMF. Tighten the screws retaining the encoder stainless steel
flex mounts.
Additional installation and handling instruction available at:
www.quantumdev.com/pdf/EncoderMountingInstr.pdf
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