M880/M840 Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 11 Web Site: www.leadshine.com
b)
t2: DIR must be ahead of PUL active edge by 5
m
s to ensure correct direction;
c)
t3: Pulse width not less than 1.2
m
s;
d)
t4: Low level width not less than 1.2
m
s.
11. Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Over-voltage protection
When power supply voltage e96VDC, protection will be activated and power indicator LED
will turn red. When power supply voltage is lower than +22VDC, the driver will not works properly.
Over-current Protection
Protection will be activated when continuous current reaches to 14A.
Short Circuit Protection
Protection will be activated in case of short circuit between motor coils or between motor coil and ground.
Wrong Motor Connection Protection
Protection will be activated when the motor is connected in a wrong way.
When above protections are active, the motor shaft will be free or the LED will turn red. Reset the
driver by repowering it to make it function properly after removing above problems.
Attention
:
Since there is no protection against power leads (
﹢
,
﹣
) reversal, it is critical to make
sure that power supply leads correctly connected to driver. Otherwise, the driver will be damaged
instantly.
12. Frequently Asked Questions
In the event that your driver 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.
M880/M840 Microstepping Driver Manual V1.0
Tel: +086 0755-26434369 12 Web Site: www.leadshine.com
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
Symptoms
Possible Problems
No power
Microstep resolution setting is wrong
DIP switch current setting is wrong
Fault condition exists
Motor is not rotating
The driver is disabled
Motor rotates in the wrong direction
Motor phases may be connected in reverse
DIP switch current setting is wrong
The driver 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 driver heating
Current is set too high
