Delta RMC101 - Manual (Page 812)

RMC100 and RMCWin User Manual
C-42
C.3.9 Steps/Rev
Default: 1
Range: 1 to 65535
This parameter is available on stepper axes only. It is used with the Pos Units/Rev parameter to
determine the scaling between position units and steps output by the RMC. These steps can be
interpreted by the stepper drive as either a full step or microstep.
The use of this parameter is summarized by the following equation, which is applied every control
loop to convert the change in the Target Position to steps that are output.
As the name implies, the recommended value to enter in this parameter is the number of steps
required to move the motor one revolution. Therefore, for a step motor with 48 steps per
revolution and drive with 100 microsteps per step, you would enter a 4800 in this field. However,
there may be times when you will not want to enter this value, but instead adjust this field in
conjunction with the QUAD CNTS/REV and POS UNITS/REV fields. For a full discussion,
including examples, on scaling with stepper modules, see Stepper Scaling.
C.3.10 Pos Units/Rev
Default: 1
Range: 1 to 65535
This parameter is available on stepper axes only. It is used with the Steps/Rev parameter to
determine the scaling between position units and steps. It is also used with Quad Cnts/Rev to
determine the scaling between position units and quadrature counts. Therefore it is used in the
following two conversions:
Because this parameter is used in both scales, changing its value will change the effective scale
between position units and both quadrature counts and steps. For more information on the
quadrature scale, see Quad Cnts/Rev. For more information on the step scale, see Steps/Rev.
As this parameter’s name implies, the intended use of this parameter is to enter the number of
position units you wish to have in one revolution. This works well in applications where the
stepper, quadrature encoder, and position units are all taken from the same axis and there are a
whole number of position units per revolution. The following are some possible values:
Position Units Pos Units/Rev