Instruction Manual PSx3xxPL
37
To ensure that the position value 1,200,000 is at the upper end of the
maximum possible positioning range, as specified (i.e. at the upper limit), we
add the safety margin of three rotations to this value and thus obtain our value
for the upper mapping end:
upper mapping end = 1,200,000 + 3 * 5,000 = 1,215,000
The device then recalculates the positioning range limits:
lower limit = upper mapping end - 253 * 5,000 = -50,000
upper limit = upper mapping end - 3 * 5,000 = 1,200,000
This positioning range can then be restricted as required, i.e. the lower limit
can be increased and the upper limit can be reduced.
4.6.5 Step-by-step instructions for determining the positioning range
The following section describes the procedure for determining those parameters that
have an influence on the target and actual position as well as the positioning range.
The individual steps must be carried out in the specified order.
1) Setting the direction of rotation:
The direction of rotation determines with which direction of rotation of the
output shaft the position values increase and with which direction of rotation of
the output shaft the position values decrease.
2)
Setting numerator and denominator:
The numerator and denominator determine the number of steps into which
one rotation of the output shaft is divided.
3) Setting referencing value:
The referencing value is used to assign a specific value of the actual position
to a specific physical position of the axle.
The referencing value is written either directly or by setting the actual position.
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