MSE570_1 Datasheet, PDF (4/5 Pages) List of Unclassifed Manufacturers – Bipolar Stepper Motor Drive Board

Motor current setting
The output current per phase is normally set using a
four way DIP switch as follows:
Switch setting
SW2-1 SW2-2
off
off
off
off
off
off
off
off
off
on
off
on
off
on
off
on
on
off
on
off
on
off
on
off
on
on
on
on
on
on
on
on
SW2-3
off
off
on
on
off
off
on
on
off
off
on
on
off
off
on
on
SW2-4
off
on
off
on
off
on
off
on
off
on
off
on
off
on
off
on
Nominal output
current per phase
0.0A
0.5A
0.9A
1.2A
1.3A
1.6A
1.85A
2.1A
2.3A
2.5A
2.7A
2.9A
3.0A
3.1A
3.3A
3.5A
The above setting are approximate and may be
influenced by the motors resistance and inductance.
The output current should ideally be checked during
commissioning, using an analogue meter.
Status LED’s (user fit option)
Provision has been made for the user to fit five status
light emitting diodes. These may be soldered into their
locations at the front of the board.
LED1
LED2
LED3
LED4
LED5
green
yellow
red
red
yellow
power is on
output is disabled
overtemperature fault detected
overload fault detected
home phase output
On board oscillator (user fit option)
A simple voltage controlled oscillator may be
constructed on the drive board by the addition of a few
components. These parts are located at the lower front
of the board at the edge and may be soldered in without
removal of the heatsink. The output of this oscillator may
be connected directly to the step pulse input (pin 14c).
The motor current may be reduced from the value set on
the DIP switch by connecting a resistor from the current
program input to 0V. This may be used to set the phase
current by the connector the unit is plugged into, or to
reduce the motor current on application of an external
signal such as at standstill.
The external resistor should be selected to give the
required voltage on the current program input of
approximately 0.47 x required current per phase.
Thermal protection (user fit option)
A thermal sensor may be fitted to prevent overheating of
the heatsink and output devices. The sensor should be
a switching type that opens on excessive temperature
such as AIRPAX type 67L080, that operates at 80ºC.
This device may be clipped onto the heatsink bracket
and soldered into the location SW3.
This feature will give a warning on the overtemperature
output, that the heatsink is too hot. This condition may
be latched by setting switch SW1-2 (LT) on. The drive
may be automatically disabled on overtemperature by
setting switch SW1-1 on
Oscillator external controls
The external controls for the oscillator may be
connected via the 32 way DIN41612 connector or
alternatively, if front panel controls are required, may be
connected via a 5 pin MOLEX connector (P3).
+12V
P3-5 or pin 26a
VR2 high speed set
Max
0V
P3-4 or pin 30a
VCO speed i/p
P3-3 or pin 22a
VCO base speed
P3-2 or pin 24a
VCO run/stop
P3-1 or pin 24c
Min
Base speed
High speed
VR1 base
speed set
close for run
MSE570 data sheet
Page 4 of 5
Issue 002