EM882S Digital Stepper Drive User Manual
Motion Control Products Ltd. Tel.: (+44) 01202 599922
12.
Troubleshooting
In the event that your driv
e doesn’t operate properly, the first step is to identify whether the
problem is electrical or
mechanical in nature. The next step is to isolate the system component that is causing the problem. As part of this
process you may have to disconnect the individual components that make up your system and verify that they
operate independently. It is important to document each step in the troubleshooting process. You may need this
documentation to refer back to at a later date, and these details will greatly assist our Technical Support staff in
determining the problem should you need assistance.
Many of the problems that affect motion control systems can be traced to electrical noise, controller software errors,
or mistake in wiring.
Problem Symptoms and Possible Causes
Trouble
Solution Measures
Motor is not rotating
No power, to start power supply
Pulse/revolution setting is wrong
DIP switch current setting is wrong
Fault condition exists or the drive is disabled
Motor rotates in the wrong
direction
Motor phases may be connected in reverse
Pulse mode may be wrong
Red light blinking
Red light blinks 1 time or always on, try not to connect the motor and restart the
power supply
Red light blinks 2 times, check the power voltage and restart the power supply
Red light blink 5 times means motor stall
Erratic motor motion
Current setting is too small, losing steps
Wrong motor connection or has broken circuit in motor coil.
The current of the control signals is not in the range of 7-15mA
Control signals don
’
t meet the requirements of
of the control signals
Motor stalls or loss steps
Output current of the drive is too small or motor torque is not enough
Acceleration is set too high
Power supply voltage too low
Modify the activated edge value in the ProTuner or the control signal is
interfered with.
Excessive motor and drive
heating
Inadequate heat sinking / cooling
Automatic current reduction function not being utilized
Reduce output current
