Incremental
Absolute
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| The MW-1 measuring wheel is 12.00” ± .01”
circumference and the MW-30 is 30.00cm ± .025cm circumference.
Both are designed for use with any Photocraft encoder. The wheel is cast
aluminum with a .38” wide urethane tire having a high coefficient of
friction (Shore hardness 83A), and a 10-24 set screw. |
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| The MW-1W and MW-30W are similar
to the MW-1 and MW-30 but have are 1" (25mm) wide urethane tire. |
| The MW-1R and MW-30R are made using the same
aluminum wheel as the MW-1 and MW-30, but have a replaceable O-ring
that can be ordered separately. |
| Need a larger or smaller measuring wheel? Ask about our
programmable encoder that can simulate a different wheel size, yet use a
standard size wheel. |
| To use a wheeled encoder on a curved section of conveyor,
see the IW modification for the RH
or RH-P wheeled encoders. |
| Aluminum, helical coil style flexible couplings are
available for shaft-to-shaft connection of the encoder. These
significantly reduce bearing wear caused by axial and angular misalignment
of the mating shafts. |
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All flexible mounting brackets are made from stainless steel that flexes to accommodate the axial
misalignment between the rigidly coupled encoder/motor shafts and the
motor mount. Failure to use a flexible mounting such as this can significantly
reduce the life of the encoder’s bearings.
The table shows the flexible mounting bracket model, mounting bolt circle,
the encoders it will fit, and a picture.
Note: click on the model for the datasheet.
Rigid tethers are used to hold the encoder stationary when the
encoder's shaft or hollow shaft is rigidly coupled to a motor shaft. However,
unlike a flexible tether (as shown above) the arm of the rigid tether cannot be
rigidly fastened to the motor housing. Rather it should be held in place by
fastening a pin to the motor housing that is parallel to the motor shaft and a
short distance from the shaft such that it engages the tether's slot. This holds
the tethered encoder stationary while still allowing it to float on the shaft,
and thus preventing damage to the encoder bearings.
The table shows the flexible mounting bracket model, mounting bolt circle,
the encoders it will fit, and a picture.
Note: click on the model for the datasheet.
| Datasheet |
MB-FB2A |
MB-FB2B |
Mounting
bolt circle |
4.3" to 6.8" (109 to 172mm)
bolt circle |
3.75" to 6.75" (96 to 171mm)
bolt circle |
| Encoder |
HS20, R20, RG,
RL |
HS20 |
| Picture |
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| Rigid aluminum couplings are available for shaft-to-shaft
connection of the encoder. These are appropriate where axial and angular
misalignment is not an issue.
The MB-085 (shown at the right) couples a 3/8" diameter
encoder shaft to a 1" diameter shaft.
The MB-085-.75 couples a 3/8" diameter encoder shaft to a
3/4" diameter shaft.
The MB-085-.375 couples a 3/8" diameter encoder shaft to a
3/8" diameter shaft.
Please inquire about other models.
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| Alloy steel shaft stub that can be threaded into a drilled
and tapped hole at the end of a conveyor roller. The shaft stub provides a
small diameter shaft for mounting a hollow shaft encoder. |
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Please call for more information about any of the following:
| Cable assemblies: consist of a mating
connector for the encoder and 10’ (3m) of cable, fully assembled and
tested (other lengths are available). |
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| Mating connectors: mating connector and
hardware for the encoder. |
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| Extension cables: consists of a cable
assembly with the encoder mating connector (socket) on one end and a plug
that will mate with another cable assembly on the other end. |
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| The adapters shown in the figures to the right can be
attached to the model R20, RG, RJ or
RS encoders as described in the datasheet.
They provide alternate bolt hole patterns or methods of mounting the
encoder. |
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| The MB-RD and MB-RD2 mounting brackets adapts the
R20, RG or RJ
encoders for use with a measuring wheel. It may be rigidly attached to a
mounting beam (not provided) or used with the Y-1G Yoke Assembly. |
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| The Y-1G provides a pivot point that allows
the model R20, RG or RJ encoder to ride on top of a conveyor belt, roller, or
web. The weight of the encoder is sufficient to maintain contact when
mounted above the moving material. |
The yoke assembly provides a single point of attachment that allows
the model RH pulse position indicator (PPI) to maintain alignment with the
conveyor belt or rollers, and therefore minimize wheel wear. With its
double wheel construction, the PPI is self-aligning when allowed to pivot
freely from the yoke, and its weight is sufficient to maintain contact when
mounted above the moving material.
| The Y-1 is 2.25" length
and includes a 1/4-28
mounting bolt |
Datasheet
(49k) |
| The Y-2A is 3.25" length
and includes a 3/8-16
mounting bolt |
Datasheet
(45k) |
| The Y-3 is 2.25" length
and includes a 3/8-16
mounting bolt |
Datasheet
(49k) |
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| The MB-UB1 Counter weight assembly facilitates mounting the
model RH or RH-P wheeled
encoder under the conveyor belt (or
roller) as shown in the figure. It provides a single pivot point so the wheels maintain contact and alignment with the belt, compensating for
up/down and some sideways movement of the belt. The MB-UB1A is identical to the MB-UB1 except it has 2
weights rather than 1. This doubles the force of the measuring wheels
against the conveyor belt.
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| The MB-UB2 was designed for the RH wheeled
encoder, and R20, RG or RJ encoders when used with an
MB-RD2 bracket and a
measuring wheel. It mounts to the side of a moving web and provides a
pivot point so the encoder measuring wheels can ride on the moving web.
The MB-UB2 can be ordered with either a 7” or an 11-1/4” arm. The
extension and height of the arm is fully adjustable |
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| Shown with RH or RH-P
encoder |
Shown with RG or RJ
encoder |
| The MB-UB3 Counter weight assembly facilitates mounting the
model RH or RH-P wheeled
encoder under the conveyor belt (or
roller) as shown in the figure. The pivot yoke rotates 360° relative to
the mounting plate giving maximum flexibility in locating the plate. The
pivot point allows for up and down movement of the encoder with the
conveyor belt while the two springs assure constant contact of the wheels
to the conveyor. The pivot point and pivot yoke are centered on the
encoder to automatically optimize alignment with the conveyor and minimize
wheel wear. |
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| The MB-UB4 Counter weight assembly facilitates mounting the
model RH or RH-P wheeled
encoder under the conveyor belt (or
roller) as shown in the figure. It provides a pivot point that allows for
up/down and some sideways movement of the encoder with the conveyor belt
while the springs assure constant contact of the wheels to the conveyor.
The pivot point is centered on the encoder to automatically optimize
alignment with the conveyor and minimize wheel wear. |
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| The MB-FL5 provides a rigid mounting bracket for the
RL encoder (see RL or RL-P
encoders). During installation it can be adjusted in all three dimensions
to optimize alignment with the mating shaft. Because it is a rigid
mounting, we recommend the use of a flexible shaft coupling when directly
coupling the encoder shaft to another shaft. |
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