User guide
CME 2 User Guide Motor Phasing
Copley Controls 103
10.2: Guidelines for Choosing Auto Phase Current and
Increment Rate Values
Here are some considerations in choosing Auto Phase Current and Increment Rate
values:
If friction is high, more current may be required to move the load.
High static friction may require more current to overcome stiction.
Transition from static friction to dynamic friction, and back, may produce jerky motion.
A faster rate will operate in the dynamic friction range.
A slower rate will operate in the static friction range.
If the friction is low, as in the case of air bearings, low frequency oscillations may
occur; thus, less current and slower rates may be required. If oscillations persist, then
friction may need to be temporarily added.
10.3: Troubleshoot the Auto Phase Process
1
Motor direction setup problems
If motor direction setup step failed:
Check Encoder or resolver power and signals.
Verify that the encoder is differential. (Contact factory if encoder is single-ended.)
Check shielding for proper grounding.
2
Motor wiring setup problems
If motor wiring setup step failed:
Verify that amplifier is disabled.
Check for mechanical jamming.
Check for smooth motion with no mechanical jerking.
Check for good connections to the motor power wires.
Disconnect motor power wires and measure for proper motor resistance.
3
Phase count test problems
If phase count test failed, verify that in the Motor/Feedback screen the following
parameters have been set correctly:
Number of Poles for rotary motors. See Verify the motor’s pole count (p. 109).
Magnetic Pole Pair Length for linear motors.
Encoder Lines or Fundamental Lines for rotary encoders.
Encoder Resolution for linear encoders.
4
Halls wiring setup problems
If Halls wiring setup step failed:
Check Halls power and signals.
Check for smooth motion with no mechanical jerking.
Check shielding for proper grounding.
If the auto phase procedure fails despite these corrective measures, see Phase Motor
Manually (p. 104).