Moons' MSST10-S - Page 21

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Rev:5.0
6/08/2010
Rev:5.0
6/08/2010
MSST5/10-S UserManual
MSST5/10-S UserManual
Steps/Rev allows adjustment of the way the drive responds to incoming step pulses. If a step mo-
tor drive in an existing application is being replaced with a new drive, the new drive can be cong-
ured here to have the same number of steps/rev as the old one.
In a new application, this value should be entered in accordance with the pulse source or indexer.
The motor will provide smoother, more precise motion with a higher step count, but when the
frequency of the indexer is limited, the steps/rev may need to be reduced to achieve the desired
speed range. For example, in an application requiring a maximum speed of 20 revs/second where
the indexer is limited to a 100kHz maximum pulse rate, the steps/rev should be no higher than
5000.
A particular value may also be entered to make one step result in a convenient increment of mo-
tion. For example, in a linear motion application using a lead screw with a pitch of 5 turns per inch,
20,000 steps/rev will provide a nominal movement of .00001 inches per step. Move lengths can be
more easily calculated with this method. For a metric application with the same lead screw, 50,800
steps/rev would result in .00001 mm per step.
Encoder following applications can also be easily congured with a particular Steps/Rev value. To
drive the motor two turns for every one turn of a 2000 count/rev (500 line) encoder, the value of
1000 steps/rev would be entered.
Other I/O Settings
Functions can also be assigned to the EN input and the output in the Pulse & Direction Control
box.