DM870 Digital Stepping Driver Manual V1.0
Tel: +086 0755-26434369 13 Web Site: www.leadshine.com
Over-voltage Protection
When power supply voltage exceeds 91
±
1 VDC, protection will be activated and RED LED will
turn on twice within each periodic time (3 s).
Phase Error Protection
Motor power lines wrong & not connected will activate this protection. RED LED will turn on four
times within each periodic time (3 s).
Attention:
When above protections are active, the motor shaft will be free or the LED will turn red.
Reset the Drive by repowering it to make it function properly after removing above problems. Since
there is no protection against power leads (
﹢
,
﹣
) reversal, it is critical to make sure that power
supply leads correctly connected to Drive. Otherwise, the Drive will be damaged instantly.
Protection Indications
Priority
Time(s) of ON
Sequence wave of RED LED
Description
1
st
1
Over-current protection
2
nd
2
Over-voltage protection
3
rd
4
Phase error protection
12. Frequently Asked Questions
In the event that your Drive 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.
DM870 Digital Stepping Driver Manual V1.0
Tel: +086 0755-26434369 14 Web Site: www.leadshine.com
Problem Symptoms and Possible Causes
Symptoms
Possible Problems
No power
Microstep resolution setting is wrong
DIP switch current setting is wrong
Fault condition exists
Motor is not rotating
The Drive is disabled
Motor rotates in the wrong direction
Motor phases may be connected in reverse
DIP switch current setting is wrong
The Drive in fault
Something wrong with motor coil
Control signal is too weak
Control signal is interfered
Wrong motor connection
Something wrong with motor coil
Erratic motor motion
Current setting is too small, losing steps
Current setting is too small
Motor is undersized for the application
Acceleration is set too high
Motor stalls during acceleration
Power supply voltage too low
Inadequate heat sinking / cooling
Automatic current reduction function not being utilized
Excessive motor and Drive heating
Current is set too high