Anaheim MICROSTEP DRIVER MDM40001 User Manual
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MICROSTEP SELECTION
FULLSTEP OUTPUT SIGNAL
The number of microsteps per step is selected by switches 1, 2, 3, and 4 of the DIP
The MDM40001 has an active LOW open drain output at Connector P1, Pin 7 labeled
switch. Table 5 shows the standard resolution values along with the associated inputs
ON F/S OUT. This output is TRUE (active low) for the duration of the full step. A full
for the select switches 1, 2, 3 and 4. The standard waveforms are sinusoidal.
step occurs when either Phase 1&3 or Phase 2&4 cross through zero (ie. full current in
Resolution
Steps/
Select 1
Select 2
Select 3
Select 4
Rev
2
400
ON
ON
ON
ON
4
800
OFF
ON
ON
ON
8
1,600
ON
OFF
ON
ON
16
3,200
OFF
OFF
ON
ON
32
6,400
ON
ON
OFF
ON
64
12,800
OFF
ON
OFF
ON
128
25,600
ON
OFF
OFF
ON
256
51,200
OFF
OFF
OFF
ON
5
1,000
ON
ON
ON
OFF
10
2,000
OFF
ON
ON
OFF
25
5,000
ON
OFF
ON
OFF
50
10,000
OFF
OFF
ON
OFF
125
25,000
ON
ON
OFF
OFF
250
50,000
OFF
ON
OFF
Open
TABLE 5
In order to select the microstepping
swicthes the top cover plate of the driver
must be removed. The dip switches are
located on the top left hand corner as
show on the drawing to the right.
one winding and 0 current in the other winding). This full step position is a common
position no matter what resolution is selected.
This output can be used to count the number of mechanical full steps the motor has
traveled without having to count the number of microsteps in between. A controller that
utilizes this output can greatly reduce its position tracking overhead and thus
substantially increase its throughput.
This high speed MOSFET output is non-isolated and has the ability to sustain the
maximum driver voltage at 25mA maximum.
OPTICALLY ISOLATED INPUTS
The following inputs to the MDM40001 are Optically Isolated.
Item
Pin #
Clock
1
Direction
2
On/Off
4
Reset
5
WARNING! If using a voltage other than +5VDC, the current through the optocoupler
must NOT exceed the maximum limit.
The Isolated inputs may be powered by a DC voltage other than +5 VDC. In doing so,
care should be taken to limit this current, an external resistor should be placed in series
with the input pins (1-2, 4-5). The value of the resistor should be calculated such that the
input current is approximately equal to the value listed in the Electrical Specifications.