DMA860H Fully Digital Stepper Drive Manual V1.0
11
a) t1: ENA must be ahead of DIR by at least 5
s. Usually, ENA+ and ENA- are NC (not connected). See
“Connector P1 Configurations” for more information.
b) t2: DIR must be ahead of PUL effective edge by 5
s to ensure correct direction;
c) t3: Pulse width not less than 2.5
s;
d) t4: Low level width not less than 2.5
s.
11. Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Priority
Time(s) of
Blink
Sequence wave of red LED
Description
1st
1
Over-current protection activated when peak
current exceeds the current limit.
2nd
2
Over-voltage protection activated when drive
working voltage exceeds the voltage limit.
When above protections are active, the motor shaft will be free or the red LED blinks. Reset the driver by repowering it
to make it function properly after removing above problems.
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.
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
Motor is not rotating
No power
Microstep resolution setting is wrong
DIP switch current setting is wrong
Fault condition exists