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4 ph stepper motor 2
- Thread starter adavidi
- Start date
-
1
- #2
jbartos
Electrical
- Jan 15, 2000
- 6,440
Suggestions marked ///\\I need to check stepper motor (4 phase) for:
1. Shaft moment with or without load.
///Dynamometer might be used.\\2. Wire connection.
///There may or may not be one. A visual inspection is usually performed.\\3. Rotation direction.
///Phase sequence meter might potentially be applied.\\4. Bearings.
///Bearings can be tested for vibration, temperature, etc.\\Does anyone know about test device in the market that can check these parameters?
///There appears to be a need for more than one test device.\\Thanks in advance.
Aharon
1. Shaft moment with or without load.
///Dynamometer might be used.\\2. Wire connection.
///There may or may not be one. A visual inspection is usually performed.\\3. Rotation direction.
///Phase sequence meter might potentially be applied.\\4. Bearings.
///Bearings can be tested for vibration, temperature, etc.\\Does anyone know about test device in the market that can check these parameters?
///There appears to be a need for more than one test device.\\Thanks in advance.
Aharon
- Thread starter
- #3
-
1
- #4
Ada,
The best place to start is with the manufacture of the
motor. Typically they can provide hook-up info and
the winding resistance of each phase.
If this info is not available check that the pahses
have equal resistance.
re: rotation; direction is determined by how the phases
are hooked up to the driver.
re: torque; this would be hard to do on a dyno without
heating up the motor.
I use to check magnet integrity [which generates the
torque] by attaching a torque watch to the shaft and
energizing all the phases. Typically there's a current value on the label - apply voltage up to that current level. Note: This all must be done quickly.
The shaft will lock on a step - evenly apply torque to
the watch and read the torque before the shaft clicks to the next step.
Sometime they have this torque value on the label.
re: bearings; remove the end covers and spin the bearings
- if the bearing spin freely, without noise, the bearings
are probably O-K. Whatever you do - do not remove the
rotor!
Hope this helps...
P.
The best place to start is with the manufacture of the
motor. Typically they can provide hook-up info and
the winding resistance of each phase.
If this info is not available check that the pahses
have equal resistance.
re: rotation; direction is determined by how the phases
are hooked up to the driver.
re: torque; this would be hard to do on a dyno without
heating up the motor.
I use to check magnet integrity [which generates the
torque] by attaching a torque watch to the shaft and
energizing all the phases. Typically there's a current value on the label - apply voltage up to that current level. Note: This all must be done quickly.
The shaft will lock on a step - evenly apply torque to
the watch and read the torque before the shaft clicks to the next step.
Sometime they have this torque value on the label.
re: bearings; remove the end covers and spin the bearings
- if the bearing spin freely, without noise, the bearings
are probably O-K. Whatever you do - do not remove the
rotor!
Hope this helps...
P.
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- #5
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