Scaling page

Use the settings on the
Scaling
 page in the
Axis Properties
 dialog box to enter scaling options to convert between raw internal and motion units. For example, the software program can convert the Feedback Counts or Planner Counts to a preferred unit of measure, such as revolutions, degrees, meters, or inches.
Select the
Load Type
 that best matches the mechanical linkage between the motor and the load. The software calculates the
Conversion Constant
,
Unwind
, and
Planner Resolution
 values when selecting
Apply.
 If there are invalid values, a message appears to adjust the scaling values. Adjust the value and select
Apply
 again.
TIP: To open the Scaling page:
  1. In the
    Controller Organizer
    , expand the
    Motion Groups
     folder, then right-click the axis and select
    Properties
    .
  2. From the
    Axis Properties
     dialog box, in
    Categories
    , select
    Scaling
    .
The appearance of the page changes based on the
Travel Mode
 selection.
Parameter
Description
Load Type
Select a load type. Valid values include:
  • Direct Coupled Rotary -
    the load is directly coupled to the linear motor moving mass
  • Rotary Transmission -
    the rotational load is coupled to the motor through a geared transmission
  • Linear Actuator
     - the linear load is coupled to a rotary motor through a rotary to linear mechanical system
I:O Ratio
Enter an I:O ratio.
This parameter is available when
Load Type
 is set to
Rotary Transmission
or
Linear Actuator
.
Actuator Parameters
These parameters specify the characteristics of the linear actuator mechanics by the
Actuator Type
.
Type
Enter the type of actuator.
Valid values include:
  • <none>
  • Screw
  • Belt and Pulley
  • Chain and Sprocket
  • Rack and Pinion
Lead/Pitch
The lead or pitch of a screw actuator.
Diameter
Enter the diameter and the unit of measure (millimeter or inch) of the Actuator.
Scaling Units
Enter a value for the scaling units. The units value updates and is used throughout the Axis Properties.
Scaling
Enter a scaling value based on the units in
Scaling Units
.
per
Enter a value per the number of motor units entered in
Scaling
.
The numerator units are the position units specified in
Units
. The denominator units are based on the Motion Unit attribute and may be based on the motor unit or the feedback unit.
The motion unit is read-only and may have the following possible selections:
Control Setting Value of Motion Unit
Motor Rev 0
Load Rev 1
Feedback Rev 2
Motor mm 3
Load mm 4
Feedback mm 5
Motor Rev/s 9
Motor m/s 11
The
Motor Unit
 or the
Feedback Unit
 selections determine the value of the motion
Units
. The unit value to use depends on the
Axis Configuration
 and
Feedback Configuration
 selections on the
General
 page.
Travel Parameters
Travel parameters change as the mode selection changes.
Mode
Select a mode of travel for an axis.
  • Unlimited.
    Travel for axes that run continuously without limit, but are not cyclic.
  • Limited.
    Travel for axes that have limits for travel.
  • Cyclic.
    Travel for axes with positions that repeat in a production cycle.
Tip:
 Selecting
Cyclic
disables Soft Travel Limits on the linear axis.
Range
Enter a travel range in position units.
Range
 is available when
Travel Mode
 is set to
Limited
.
Unwind
Set the number of unwind cycles per motor revolutions.
The numerator units are position units. The denominator unit is fixed at motor rev.
Unwind
 is available when
Travel Mode
 is set to
Cyclic
.
Soft Travel Limits
Select to enable software overtravel checking for an axis.
An overtravel fault occurs when:
  • Soft travel limits is enabled
  • The axis passes beyond the maximum travel limits (positive or negative)
This parameter is not available when
Travel Mode
 is set to
Cyclic
.
Maximum Positive
Enter the maximum positive used for software overtravel checking in position units. The
Maximum Positive
limit is always be greater than the
Maximum Negative
 limit.
Maximum Negative
Enter the maximum negative position used for software overtravel checking in position units. The
Maximum Negative
 limit is always be less than the
Maximum Positive
 limit.
Parameters
Opens the
Motion Axis Parameters
 page to modify existing or additional parameters.
Tip:
 The
Parameter List
 page may contain more attributes than the associated page. In some cases, attributes that display on the
Parameter List
 page do not display on the associated page.
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