8
M850 High Performance Microstepping Driver
____________________________________________________________________________________________
a number of built-in protections features.
ndicator LED will turn red.
h
, the driver will not work properly.
otherwise damage the
riv
ads are correctly connected to driver. Otherwise, the driver will be damaged instantly.
ams illustrate connection to various kinds
of m
Note at when two coils are parallelly connected, coil inductance is reduced by half and motor speed can be
ignificantly increased. Serial connect
the motor can be run well only at
ffer a high degree of flexibility to the system designer in that they may be connected in series or parallel,
us satisf
tance, the performance will start to degrade at higher speeds. Divide the
W
_
8.
Protection Functions
To improve reliability, the driver incorporates
a. Over-voltage
protection
When power supply voltage e80VDC
*
, protection will be activated and power i
W en power supply voltage is lower than +18VDC
b. Coil-ground Short Circuit Protection
Protection will be activated in case of short circuit between motor coil and ground.
c. Over-current
Protection
Protection will be activated in case of excessive current (such as a short circuit) which may
d
er.
Attention
:
since there is no protection against power leads (
﹢
,
﹣
) reversal, it is critical to make sure that power
upply le
s
9.
Driver Connection to Step Motors
WM850 driver can drive 4, 6, 8 lead hybrid step motors. The following diagr
or leads:
ot
Figure 4: Driver Connection to Step Motor
th
s
lo
ion will lead to increased inductance and thus
wer speeds.
9.1 Connecting to 8-Lead Motors
lead motors o
8
th
ying a wide range of applications.
Series Connection
A series motor configuration would typically be used in applications where a higher torque at lower speeds is required.
Because this configuration has the most induc
motor's unipolar (peak) current rating by 1.4 for the RMS current, or the motor's bipolar current rating is the RMS
current.
* For the European Market – the maximum input voltage must be limited to 70VDC to comply with CE regulations.
