Control Techniques Epsilon EP-I Reference Manual page 136

Epsilon EP-I Indexing Drive and FM-2 Indexing Module Reference Manual
V . Use the figure below to determine the electrical angle at the rising edge of U. Determine the marker electrical angle in
TS
a similar manner.
Figure 113: CW Electrical Angle Plot
In Figure 76 the electrical angle decreases from left to right and the positive peak of V
Figure 77 the electrical angle increases from left to right and the negative peak of V
that with a CW reference rotation the negative peak of V
left to right.
Note
If you cannot obtain a stable angle measurement between U or Z and V
cycles per revolution for your motor's pole count.
Establishing a Standard Alignment
A typical encoder alignment practice is to set the rising edge of U to zero crossing of the rising wave of V
rotating CCW.
Dynamic Alignment Method
This method is used at Control Techniques to establish the alignment on motors. It is accomplished by spinning the motor
CCW with another device while monitoring U and V
on its mounting until the desired alignment is established. The encoder is then locked down. This will cause the rising edge
of V to line up with the rising edge zero crossing of V
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is at zero electrical degrees and the electrical angle decreases from
TS
, check the encoder to verify it has the proper
TS
. Then while the motor is spinning CCW, the encoder body is rotated
SR
when the encoder reference rotation is CCW.
RT
occurs at zero degrees electrical. In
TS
occurs at zero degrees electrical. Note
TS
with the motor
SR