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Mounting the REXT (partial rotation)
:
IMPORTANT
•
For partial rotation applications using a DSi, a REXT ring (two reference marks opposite each other) is required.
•
The ring must be installed so that, when the ring is rotated, each readhead only sees a single reference mark.
•
Both readheads must see a single reference mark to complete the initialisation sequence, see
•
The maximum angle of rotation of the rotor / hub is 357° (Figure 1).
•
The minimum angle of rotation of the rotor / hub is 3° (Figure 2).
•
The reference mark is output at 0° and will be the average detected difference between readhead (H1) and readhead (H2).
•
The position of the reference mark output can be set by the user; see
Figure 1: Maximum angle of rotation
H1
R1
18
TONiC
REXM20 / REXT20 angle encoder system installation guide
™
'Selecting a new reference mark output position (propoZ)'
0°
Maximum system
operating range:
0° ±178.5°
R2
H2
'Initialisation'
on page 32.
on page 33.
Figure 2: Minimum angle of rotation
H1
R1
0°
Minimum system
operating range:
0° ±1.5°
R2
H2
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