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Interpolate encoders provide a higher degree of angular resolution. These
encoders are ideal for position readouts and position servo applications.
The major specifications of interest for this type of encoder are transition
accuracy and frequency response. In position readout situations the system
usually doesn’t know where it is within a particular count, so tight
transition accuracy specs tend to be wasted.
What is desired in these applications is the ability
to subdivide a “count” into smaller divisions to improve system
resolution. Interpolation provides this ability without any sacrifice
in mechanical integrity or internal electrical signal strength.
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The factory will be pleased to assist you in construction of the model
number.
Call toll-free: 800-350-ASAP (2727)
When constructing the model number for any one of BEI’s
standard encoders, insert the desired number of Cycles Per Turn, after
multiplication and the correct Interpolation designator, in the model
number between Shaft Seal Configuration and Number of Channels.
Example:
H25D-SS-7200-T2-ABZC-4469-SM18
(one possible encoder configuration with Interpolation Option T-2.)
Please refer to the Notes and Tables
page accordingly.
Interpolation Option T-2
|
Available in all models except HS25. |
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to Top |
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Electrical
Specifications
| Multiplication Factor: |
|
X 2 (T2) |
| Cycles per Turn (all Models, except
H20, HS35 and HS25): |
|
Up to 7200 (3600 X 2) |
| Cycles per Turn (H20 Model Only): |
|
Up to 2048 (1024 X 2) |
| Cycles per Turn (HS35 Model Only): |
|
Up to 10,000 (5000 X 2) |
| Supply Voltages Available: |
|
5-24 VDC ± 5%; (see Note
5) |
| Output Options (see
Note 5 for details): |
|
|
| Model H20, Line
Driver: |
|
7272, 7272 regulated |
| Model HS35, Line Drivers: |
|
4469, 7272, 7272 |
| Regulated Model H25, Open Collector:
|
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7406(R), 7406(R) regulated, 7273 |
| Line driver: |
|
8830, 4469 or 7272, regulated or unregulated |
| Current Requirements: |
|
TTL: 250 mA maximum, see Note
5
|
| Quadrature Accuracy: |
|
± 27°, measured at 1/5 maximum frequency
response. |
| Frequency Response: |
|
250 kHz, minimum count width = 1/10 base count. |
| Output Termination: |
|
see
Table
1 |
|
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Mechanical Specifications
See standard specifications for the encoder model of interest. Overall
length may increase up to 1.20” depending on options. Consult
factory.
|
Waveform
Pattern  |
Interpolation Option T-4
|
Available in all models except H20, HS35,
HS25. |
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to Top |
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Electrical
Specifications
| Multiplication Factor: |
|
X 4 (T4) |
| Cycles per Turn: |
|
Up to 14,400 (3600 X 4) |
| Supply Voltages Available: |
|
5-24 VDC ± 5%; (see Note
5) |
| Output Options (see
Note 5 for details): |
|
|
| Open Collector:
|
|
7406 (R), 7406 (R) Regulated,
7273 |
| Line Drivers: |
|
8830, 4469 or 7272, regulated or unregulated |
| Current Requirements: |
|
TTL: 250 mA maximum
|
| Transition Accuracy: |
|
± 1, measured at 1/5 maximum frequency
response. |
| Frequency Response: |
|
400 kHz, minimum count width = 1/10 base count |
| Output Termination: |
|
see
Table
1 |
| |
|
|
|
|
Mechanical Specifications
See standard specifications for the encoder model of interest. Overall
length may increase up to 1.20” depending on options. Consult
factory.
|
Waveform
Pattern 
|
Interpolation Option T-5
|
Available in all models except H20, HS35,
HS25. |
return
to Top |
|
|
Electrical
Specifications
| Multiplication Factor: |
|
X 5 (T5) |
| Cycles per Turn: |
|
Up to 18,000 (3600 X 5) |
| Supply Voltages Available: |
|
5-24 VDC ± 5%; (see Note
5) |
| Output Options (see
Note 5 for details): |
|
|
| Open Collector:
|
|
7406 (R), 7406 (R) Regulated,
7273 |
| Line Drivers: |
|
8830, 4469 or 7272, regulated or unregulated |
| Current Requirements: |
|
TTL: 250 mA maximum
|
| Transition Accuracy: |
|
± 1 count, measured at 1/5 maximum frequency
response. |
| Frequency Response: |
|
500 kHz, minimum count width = 1/10 base count |
| Output Termination: |
|
see
Table
1 |
|
|
Mechanical Specifications
See standard specifications for the encoder model of interest. Overall
length may increase up to 1.20” depending on options. Consult
factory.
|
Waveform
Pattern 
|
Interpolation Option T-10
|
Consult factory for model availability. |
return
to Top |
|
|
Electrical
Specifications
| Multiplication Factor: |
|
X 10 (T10) |
| Cycles per Turn: |
|
Up to 36,000 (3600 X 10) |
| Supply Voltages Available: |
|
5-24 VDC ± 5%; (see Note
5) |
| Output Options (see
Note 5 for details): |
|
|
| Open Collector:
|
|
7406 (R), 7406 (R) Regulated,
7273 |
| Line Drivers: |
|
8830 or 4469, regulated or unregulated |
| Current Requirements: |
|
TTL: 250 mA maximum
|
| Transition Accuracy: |
|
± 2 counts |
| Frequency Response: |
|
1 MHz, min. count width = 1/10 base count |
| Output Termination: |
|
see
Table
1 |
|
Mechanical Specifications
See standard specifications for the encoder model of interest. Overall
length may increase up to 1.20” depending on options. Consult
factory. |
Waveform
Pattern  |
Interpolation Option T-20
|
Consult factory for model availability. |
return
to Top |
|
Electrical
Specifications
| Multiplication Factor: |
|
X 20 (T20) |
| Cycles per Turn: |
|
Up to 72,000 (3600 X 20) |
| Supply Voltages Available: |
|
5-24 VDC ± 5%; (see Note
5) |
| Output Options (see
Note 5 for details): |
|
|
| Line Drivers: |
|
4469, unregulated to 15V only, 8830 or 4469 regulated |
| Current Requirements: |
|
TTL: 250 mA maximum
|
| Transition Accuracy: |
|
± 4 counts |
| Frequency Response: |
|
1 MHz, consult factory for higher response requirements,
minimum count width = 1/10 base count. |
| Output Termination: |
|
see
Table
1 |
|
Mechanical Specifications
See standard specifications for the encoder model of interest. Overall
length may increase up to 1.67” depending on options. Consult
factory. |
Waveform
Pattern
|
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