PM752 Microstepping Driver Manual V1.0
Tel: +44 (0)1202 237770 11
10. Sequence Chart of Control Signals
In order to avoid some fault operations and deviations, PUL, DIR and ENA should abide by some
rules, shown as following diagram:
Figure 11: Sequence chart of control signals
Remark:
a)
t1: ENA must be ahead of DIR by at least 5
µ
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
µ
s to ensure correct direction;
c)
t3: Pulse width not less than 1.5
µ
s;
d)
t4: Low level width not less than 1.5
µ
s.
11. Protection Functions
To improve reliability, the driver incorporates some built-in protections features.
Short-voltage and Over-voltage protection
When power supply voltage is lower than +17VDC, short-voltage protection will be activated and the
power indicator LED will turn off. When the power supply voltage is back to normal operation range,
the driver will automatically reset and power indicator LED will turn on.
When power supply voltage e95VDC, over-voltage protection will be activated and power
indicator LED will turn red.
P
M752 Microstepping Driver Manual V1.0
Tel: +44 (0)1202 237770 12
Over-current Protection
Protection will be activated when continuous current reaches to 16A.
Short Circuit Protection
Protection will be activated in case of short circuit between motor coils or between motor coil and
ground.
When above protections are active, the motor shaft will be free or the LED will turn red (except
short-voltage protection). 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.
